WO2015015863A1 - アンテナ一体型無線モジュールおよびこのモジュールの製造方法 - Google Patents
アンテナ一体型無線モジュールおよびこのモジュールの製造方法 Download PDFInfo
- Publication number
- WO2015015863A1 WO2015015863A1 PCT/JP2014/062808 JP2014062808W WO2015015863A1 WO 2015015863 A1 WO2015015863 A1 WO 2015015863A1 JP 2014062808 W JP2014062808 W JP 2014062808W WO 2015015863 A1 WO2015015863 A1 WO 2015015863A1
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- WIPO (PCT)
- Prior art keywords
- antenna
- region
- resin sealing
- sealing layer
- wireless
- Prior art date
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/526—Electromagnetic shields
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
Definitions
- the present invention relates to an antenna-integrated radio module including a radio function unit having an RF circuit and an antenna unit having an antenna conductor, and a manufacturing method thereof.
- an antenna-integrated radio module as shown in FIG. 25 has been proposed (see, for example, Patent Document 1).
- a radio function unit 502 having an RF circuit formed of circuit components such as a baseband IC, an RFIC, and a memory IC is arranged from one end side portion of the substrate 501 to the center portion.
- a cap-shaped metal case 503 is attached to the upper surface of the substrate 501 from the one end side portion to the center portion so as to cover the surface-mounted component forming the RF circuit.
- the antenna portion 504 is disposed on the other end portion of the substrate 501 by providing a helical antenna conductor 504 a made of a helical line inside the other end portion of the substrate 501.
- a matching circuit 505 for matching impedances of the wireless function unit 502 and the antenna unit 504 is provided on the other end portion of the substrate 501.
- the wireless function unit 502 is connected to a feeding point of the antenna conductor 504 a included in the antenna unit 504 via the matching circuit 505.
- the wireless function unit 502 and the antenna unit 504 are formed so as to be adjacent to different regions in the substrate 501, the shielding ground electrode pattern provided in the metal case 503 or the substrate 501 serves as the antenna unit 504. The influence which it has on can be suppressed.
- the metal case 503 is necessary to suppress the influence of the electromagnetic waves radiated from the wireless function unit 502 on the external device, which hinders miniaturization of the antenna-integrated wireless module 500. ing.
- the present invention has been made in view of the above-described problems, and provides a technology capable of easily manufacturing an antenna-integrated radio module that does not require a metal case and can be miniaturized.
- the purpose is to provide.
- an antenna-integrated radio module of the present invention includes a board in which a radio area and an antenna area are arranged at different positions in a plan view from one main surface side, and the radio area.
- a radio functional unit having an RF circuit provided on at least one of the main surface of the substrate and the inside thereof, and disposed on the antenna region, on at least one of the main surface of the substrate and the inside thereof
- An antenna portion having an antenna conductor provided; a resin sealing layer provided on one main surface of the substrate so as to cover at least one main surface side of the substrate in the radio region and the antenna region; and at least the A shield layer formed on the surface of the resin sealing layer so as not to cover a portion of the upper surface of the resin sealing layer directly above the antenna region. It is characterized in that.
- the resin sealing layer provided on one main surface of the substrate so as to cover at least one main surface side of the radio region and the antenna region is opposite to the surface facing the one main surface of the substrate.
- a shield layer is formed so as not to cover the portion directly above the antenna region. Therefore, the electromagnetic wave radiated from the wireless function unit having the RF circuit disposed in the wireless region and provided on at least one of the main surface of the substrate and the inside thereof is formed on the wireless region side of the resin sealing layer. It can be suppressed by the shield layer. Therefore, since the conventional metal case is unnecessary, the antenna integrated wireless module can be reduced in size.
- the shield layer is formed on the upper surface of the resin sealing layer so as not to cover the portion directly above the antenna region, for example, the shield layer and the antenna conductor are arranged in a position where they overlap in a plan view. In comparison, the antenna characteristics of the antenna formed by the antenna conductor can be suppressed from being deteriorated by the shield layer that is grounded, and the antenna characteristics can be improved.
- the shield layer may be formed only on the upper surface of the resin sealing layer only in a region overlapping the radio region in the plan view.
- the shield layer is only on the upper surface of the resin sealing layer provided on the one principal surface of the substrate so as to cover at least one principal surface side of the wireless region and the antenna region and overlaps the wireless region in plan view. Is formed. Therefore, the electromagnetic wave radiated from the wireless function unit having the RF circuit disposed in the wireless region and provided on at least one of the main surface of the substrate and the inside thereof is applied to the upper surface of the resin sealing layer on the wireless region side. It can suppress reliably by the formed shield layer.
- the shield layer is formed only in the region on the radio region side on the upper surface of the resin sealing layer, for example, compared with a configuration in which the shield layer and the antenna conductor are arranged in a position overlapping in plan view, The antenna characteristics of the antenna formed by the antenna conductor can be prevented from being deteriorated by the grounded shield layer, and the antenna characteristics can be improved.
- the thickness of the portion of the resin sealing layer that overlaps the antenna region in the plan view is formed to be thinner than the thickness of the portion that overlaps the wireless region in the plan view, and between the wireless region and the antenna region. It is preferable that a step is formed in the resin sealing layer.
- the radio area and the antenna area are arranged at different positions when viewed from the one main surface side, and the thickness of the resin sealing layer on the antenna area side where the antenna portion is arranged is formed thin.
- the thickness of the resin sealing layer on the antenna area side where the antenna portion is arranged is formed thin.
- the shield layer may also be formed to extend to the side surface of the step portion of the resin sealing layer.
- the shield layer extends and is formed on the side surface of the step portion formed in the resin sealing layer at the boundary between the wireless region and the antenna region, the region overlaps the wireless region in plan view. It is possible to suppress the electromagnetic wave radiated laterally from the wireless function unit arranged in the antenna from spreading to the adjacent antenna unit. Therefore, it is possible to improve the shielding effect of the shield layer that shields radiation from the wireless function unit. Therefore, it is possible to improve the isolation characteristics between the wireless function unit disposed in the region overlapping the wireless region in plan view and the antenna unit disposed in the region overlapping the antenna region in plan view.
- the resin sealing layer is formed with a groove approaching or reaching one main surface of the substrate along the side surface of the step portion, and the shield layer is formed to extend to the inner surface of the groove. May be.
- a groove is formed in the resin insulating layer along the side surface of the step portion so as to approach or reach the one main surface of the substrate, and the shield layer is formed extending to the inner surface of the groove.
- the wireless function unit and the antenna unit are separated from each other by a shield layer. Therefore, it is possible to more effectively suppress the electromagnetic wave radiated from the wireless function unit from affecting the antenna unit.
- the shield layer may be extended and formed on the side surface of the resin sealing layer surrounding the radio area.
- the shield layer since the shield layer is extended and formed in the side surface of the resin sealing layer surrounding a radio
- a predetermined recognition mark may be formed on the upper surface of the resin sealing layer in the antenna region.
- prescribed recognition mark for recognizing the arrangement direction of a module and a module type will be formed in the area
- the space on the module surface can be effectively used. Therefore, it is not necessary to newly secure a space for forming a predetermined recognition mark in the module, so that the antenna-integrated radio module can be reduced in size.
- the shield layer may be further formed on at least a part of the side surface of the resin sealing layer surrounding the antenna region.
- the shield layer can suppress the influence on the antenna characteristics and the antenna directivity to the minimum, so that the stable An antenna-integrated radio module having characteristics can be provided.
- an antenna electrode connected to the antenna unit and a signal electrode connected to the wireless function unit are provided on the other main surface of the substrate.
- the characteristics of the wireless function unit connected to the signal electrode, the reflection characteristics of the antenna conductor connected to the antenna electrode, etc. can be easily inspected individually and individually.
- the radio function part and the antenna part can be easily connected by connecting the signal electrode and antenna electrode using the wiring pattern on the other mounting board. Can be connected to.
- the antenna electrode may include an antenna electrode for one end connected to one end of the antenna conductor and an antenna electrode for the other end connected to the other end of the antenna conductor.
- the manufacturing accuracy of the antenna part can be easily determined based on the measured passing characteristics of the antenna conductor.
- a plurality of the antenna areas are provided on the substrate so as to sandwich the radio area, and in each of the antenna areas, the antenna conductor is provided on at least one of the main surface of the substrate and the inside thereof. It may be done.
- a plurality of antennas formed by the antenna conductors provided on at least one of the main surface of the substrate and at least one of the inside of each antenna region provided on the substrate so as to sandwich the wireless region are provided.
- each antenna correspond to a predetermined communication method and a predetermined frequency band, it is possible to provide an antenna-integrated radio module that supports multiband and multimode.
- the manufacturing method of the antenna integrated wireless module of the present invention is a substrate in which the wireless region and the antenna region are disposed at different positions in plan view from one main surface side, and is disposed in the wireless region,
- a radio functional unit having an RF circuit provided on at least one of the main surface of the substrate and the inside thereof, and disposed in the antenna region, provided on at least one of the main surface of the substrate and the inside thereof
- a resin sealing layer Forming a resin sealing layer, forming a conductive layer covering the surface of the resin sealing layer with a conductive material, and forming a conductive layer on the upper surface of the resin sealing layer.
- the conductive layer covering the surface of the resin sealing layer formed on the one principal surface of the substrate so as to cover at least one principal surface side of the substrate in the wireless region and the antenna region is conductive. Formed of material. In the conductive layer formed on the upper surface of the resin sealing layer, the conductive material on the antenna region side is removed, so that the upper surface of the resin sealing layer is not covered with the portion directly above the antenna region. A shield layer is formed by the layers. Therefore, the electromagnetic wave radiated from the wireless function unit having the RF circuit arranged in the wireless region can be suppressed by the shield layer formed on the wireless region side of the resin sealing layer, and the conventional metal case is unnecessary and the size is small. Therefore, it is possible to easily manufacture an antenna-integrated radio module that can be realized.
- a shield layer may be formed by the conductive layer only in a region overlapping the wireless region in the plan view on the upper surface of the resin sealing layer.
- the conductive material on the antenna region side of the conductive layer formed on the upper surface of the resin sealing layer is removed, so that the region overlapping the wireless region in plan view on the upper surface of the resin sealing layer. Only the conductive layer is formed with a shield layer. Therefore, the electromagnetic wave radiated from the wireless function unit having the RF circuit arranged in the wireless region can be effectively suppressed by the shield layer formed on the upper surface of the resin sealing layer on the wireless region side.
- a part of the resin sealing layer on the antenna region side is made conductive so that the thickness of the resin sealing layer on the antenna region side is thinner than the thickness on the wireless region side. It may be removed together with the material.
- the resin sealing layer on the antenna region side where the antenna portion is disposed is formed thin, so that the antenna characteristics of the antenna formed by the antenna conductor cover the antenna region side. It can suppress that it deteriorates with a layer. Therefore, it is possible to easily manufacture an antenna-integrated radio module in which the antenna characteristics of the antenna formed by the antenna conductor are improved.
- the conductive layer may be formed also on the inner surface of the groove formed in the groove forming step.
- the conductive layer forming step In the above, the inner surface of the groove is covered with a conductive material, so that a conductive layer can be easily formed on the inner surface of the groove.
- a side surface facing the antenna region side is formed in the resin sealing layer on the wireless region side by the inner surface of the groove. Therefore, in the conductive layer forming step, by forming the conductive layer on the inner side surface of the groove, the shield layer can be easily formed by extending to the side surface facing the antenna region side of the resin sealing layer on the wireless region side. it can. Therefore, since a shield layer can be formed between the radio area and the antenna area, the shielding effect by the shield layer can be improved, and an electromagnetic wave antenna radiated from the radio function part to the side. The influence on the part can be reduced.
- the depth of the groove from the upper surface of the resin sealing layer may be formed shallower than the thickness of the resin sealing layer, or by forming the same as the thickness of the resin sealing layer, The surface may be exposed.
- the groove depth may be formed deeper than the thickness of the resin sealing layer by providing a concave groove constituting the bottom of the groove on one main surface of the substrate.
- a marking step of forming a predetermined recognition mark on the upper surface of the resin sealing layer on the antenna region side may be further provided.
- a predetermined recognition mark for recognizing the arrangement direction of the module and the module type can be formed in a region where the shield layer on the antenna region side is not formed. Therefore, the space on the module surface can be effectively utilized. Therefore, it is not necessary to newly secure a space for forming a predetermined recognition mark in the module, so that the antenna-integrated radio module can be reduced in size.
- modules can be manufactured in a batch by a practical manufacturing method using a so-called parent substrate method.
- the portion directly above the antenna region is not covered on the upper surface of the resin sealing layer provided on the one main surface of the substrate so as to cover at least the one main surface side of the substrate of the radio function unit and the antenna unit.
- the shield layer is formed, the electromagnetic wave radiated from the wireless function unit arranged in the wireless region can be suppressed by the shield layer. Therefore, since the conventional metal case is unnecessary, the antenna integrated wireless module can be reduced in size.
- FIG. 1 is a perspective view showing an antenna-integrated radio module according to a first embodiment of the present invention. It is sectional drawing of the module of FIG. FIG. 2 is a diagram showing an example of a method for manufacturing the module of FIG. 1, and (a) to (f) show different states. It is a perspective view which shows the modification of the module of FIG. FIG. 5 is a cross-sectional view of the module of FIG. 4. It is a figure which shows an example of the manufacturing method of the module of FIG. It is sectional drawing which shows the modification of the module of FIG. It is a figure which shows an example of the manufacturing method of the module of FIG. It is a perspective view which shows the modification of the module of FIG. FIG. 10 is a cross-sectional view of the module of FIG. 9.
- FIG. 13 is a diagram showing an example of a method for manufacturing the module of FIG. 12, in which (a) to (d) show different states. It is a perspective view which shows the modification of the module of FIG. It is sectional drawing which shows the antenna integrated radio
- FIG. 1 is a perspective view showing an antenna-integrated radio module according to a first embodiment of the present invention
- FIG. 2 is a cross-sectional view of the module of FIG.
- FIG. 3 is a diagram showing an example of a method for manufacturing the module of FIG. 1, and (a) to (f) show different states.
- the shield layer 6 is filled with dots for easy understanding. 4, 9, 12, 14, 16, 19, and 20 to 22 referred to in the later description, the shield layer 6 (conductive layer 61) is similarly painted with dots, but in the later description The description is omitted.
- the antenna-integrated radio module 1 (hereinafter simply referred to as “module”) is mounted on a mounting board provided in a communication portable terminal (not shown) such as a mobile phone, a smartphone, or a tablet.
- a communication portable terminal such as a mobile phone, a smartphone, or a tablet.
- a communication portable terminal such as a mobile phone, a smartphone, or a tablet.
- a communication portable terminal such as a mobile phone, a smartphone, or a tablet.
- a communication portable terminal not shown
- a communication portable terminal such as a mobile phone, a smartphone, or a tablet.
- a communication portable terminal not shown
- a communication portable terminal not shown
- W-CDMA Standard Wideband Code Division Multiple Access
- LTE Standard Long Term Evolution Standard
- Bluetooth Registered Trademark
- the module 1 includes a board 2 provided with a radio area 21 and an antenna area 22, and one main surface 2 a of the board 2 so as to cover the radio area 21 and the antenna area 22. And a provided resin sealing layer 3.
- the resin sealing layer 3 is applied (filled) to one main surface 2a of the substrate 2 so that a general thermosetting resin for molding such as epoxy resin or cyanate resin covers the radio region 21 and the antenna region 22. Is formed.
- the wireless function unit 4 including the RF circuit 41 is disposed in a region that overlaps the wireless region 2 of the substrate 2 in plan view, and is an electronic component 42 such as an RFIC, a switch IC, or a filter element, and various chip-type passive elements such as resistors, inductors, and capacitors. (Not shown), various circuits (not shown) formed by electrode patterns in the substrate 2 are combined and formed.
- various electronic components 42 and various chip-type passive elements included in the RF circuit 41 may be mounted on one main surface 2a of the substrate 2 or any of the inside thereof.
- the antenna unit 5 including the antenna conductor 51 is disposed.
- the antenna conductor 51 has a shape corresponding to a frequency band used for communication, and is formed of a metal material on the antenna region 22 of the one main surface 2a of the substrate 2.
- the configuration of the antenna conductor 51 provided in the antenna unit 5 is not limited to the above example, and the antenna unit 5 may include an antenna conductor formed by a wiring pattern provided in the substrate 2.
- the antenna unit 5 may include a so-called chip antenna as an antenna conductor. Note that the radio area 21 and the antenna area 22 are arranged at different positions when viewed from the one main surface 2a side of the substrate 2.
- the wireless function unit 4 (electronic component 42) disposed on the one principal surface 2a of the wireless region 21 of the substrate 2 and the antenna unit 5 (antenna conductor 51) disposed on the one principal surface 2a of the antenna region 22 of the substrate 2.
- the resin sealing layer 3 is provided with a groove 31 formed along the boundary between the radio region 21 and the antenna region 22.
- the thickness H1 of the region overlapping the antenna region 22 of the resin sealing layer 3 is formed to be thinner than the thickness H2 of the region overlapping the wireless region 21, the resin sealing between the wireless region 21 and the antenna region 22 is achieved.
- a step 32 is formed in the stop layer 3.
- the shield layer 6 is formed only in a region overlapping the radio region 21 in plan view on the surface (upper surface) opposite to the surface facing the one main surface 2a of the substrate 2 of the resin sealing layer 3.
- the shield layer 6 is formed on the outer surface of the resin sealing layer 3 that surrounds the outer periphery of the wireless region 21, and the shield layer 6 is formed on the side surface of the step 32 portion of the resin sealing layer 3.
- the side surface of the resin sealing layer 3 surrounding the wireless region 21 by extending to the inner side surface of the groove 31 formed so as to be close to the one main surface 2a of the substrate 2 along this side surface, that is,
- the shield layer 6 is formed to extend over the entire surface of the resin sealing layer 3 on the radio area 21 side.
- the shield layer 6 is adjacent to the side surface of the step 32 portion of the resin sealing layer 3 and the one main surface 2a of the substrate 2 along this side surface.
- the shield layer 6 is also formed on the side surface of the resin sealing layer 3 surrounding the antenna region 22 by being formed to extend to the inner side surface of the groove 31 formed in this manner.
- the shield layer 6 is formed by applying a general conductive paste (conductive material) containing Ag, Cu, or the like to the surface of the resin sealing layer 3.
- a general conductive paste conductive material containing Ag, Cu, or the like
- a predetermined recognition mark 7 is formed in a region overlapping the antenna region 22 in plan view.
- the recognition mark 7 is used for recognizing the arrangement direction of the module 1 and recognizing the type of the module 1.
- the recognition mark 7 is formed by a general method such as silk printing or laser printing.
- the substrate 2 is formed of a multilayer ceramic substrate formed by laminating and firing a plurality of ceramic green sheets.
- the ceramic green sheet is a sheet obtained by forming a slurry in which a mixed powder such as alumina and glass is mixed with an organic binder and a solvent.
- a via hole is formed at a predetermined position of the ceramic green sheet by laser processing or the like, and the formed via hole is filled with a conductive paste containing Ag, Cu, or the like to form a via conductor 23 for interlayer connection.
- Various electrode patterns 24 are formed at predetermined positions on the ceramic green sheet by printing with a conductive paste. Thereafter, the ceramic green sheets are laminated and pressure-bonded to form a ceramic laminate. And the board
- substrate 2 is formed by what is called low-temperature baking of the ceramic laminated body at low temperature of about 1000 degreeC.
- An internal wiring pattern is formed by via conductors 23 and electrode patterns 24 inside the substrate 2 configured in this manner.
- mounting electrodes (not shown) on which various electronic components 42, various chip-type passive elements constituting a matching circuit and the like are mounted are formed.
- a signal electrode 25 connected to the wireless function unit 4 by an internal wiring pattern
- an antenna conductor 51 antenna conductor 51 (antenna unit 5)
- An antenna electrode 26 connected by the internal wiring pattern and a ground electrode 27 connected by the shield layer 6 by the internal wiring pattern are formed.
- the shield layer 6 is connected to the ground electrode 27 via the via conductor 23 by being electrically connected to the end face of the electrode pattern 24 exposed from the outer surface of the substrate 2.
- the antenna electrode 26 is connected to the feeding point of the antenna conductor 51 through the via conductor 23.
- a matching circuit (not shown) is connected to the feeding point of the antenna conductor 51.
- the substrate 2 may be formed of a printed board using a resin or a polymer material, an alumina substrate, a glass substrate, a composite material substrate, a single layer substrate, a multilayer substrate, or the like.
- the substrate 2 may be formed by selecting an optimal material as appropriate.
- the signal electrode 25 and the antenna electrode 26 are electrically connected by a wiring pattern provided on the external mounting board. Radio signals are input and output between the radio function unit 4 and the antenna unit 5.
- the modules 1 are manufactured by being separated into individual pieces.
- an assembly of the substrates 2 provided with the via conductors 23 and the electrode patterns 24 at predetermined positions is prepared (preparation process).
- a plurality of formation areas of the module 1 are provided on one main surface 2a of the assembly of the substrates 2, and a radio area 21 and an antenna area 22 are provided in the formation area.
- the wireless function unit 4 having the RF circuit 41 (electronic component 42) provided on at least one of the main surface 2a of the substrate 2 and the inside thereof. Is arranged.
- the antenna unit 5 having the antenna conductor 51 provided on at least one of the main surface 2a of the substrate 2 and the inside thereof is disposed.
- the cutting line CL shown with the broken line in the figure has shown the cutting position in the aggregate
- the wireless function unit 4 disposed in the wireless region 21 and the antenna unit 5 disposed in the antenna region 22 are included so as to cover the wireless region 21 and the antenna region 22.
- the resin sealing layer 3 is formed by applying (filling) the thermosetting resin for molding over the entire surface of the one main surface 2a of the assembly of the substrates 2 (sealing step).
- grooves 31 and 33 are formed in the resin sealing layer 3 by a general apparatus such as a dicer (groove forming step). Specifically, a groove 31 whose depth from the upper surface of the resin sealing layer 3 is shallower than the thickness of the resin sealing layer 3 is formed along the boundary between the radio region 21 and the antenna region 22. Further, a groove 33 having a depth from the upper surface of the resin sealing layer 3 deeper than the thickness of the resin sealing layer 3 is formed at the position of the cutting line CL.
- the substrate 2 is excavated together with the resin sealing layer 3 to form the groove 33, whereby the electrode pattern 24 formed at the position of the cutting line CL in the substrate 2 is cut, and the cut surface Is exposed in the groove 33.
- the groove 31 may be formed so that the depth from the upper surface of the resin sealing layer 3 is the same as the thickness of the resin sealing layer 3. In this case, the one main surface 2 a of the substrate 2 is exposed in the groove 31.
- the groove 31 may be formed such that the depth from the upper surface of the resin sealing layer 3 is deeper than the thickness of the resin sealing layer 3.
- a general conductive paste (conductive material) containing Ag, Cu, or the like is applied to the surface of the resin sealing layer 3 while filling the grooves 31 and 33.
- the conductive layer 61 covering the surface of the resin sealing layer 3 is formed (conductive layer forming step).
- FIG. 3E the conductivity of a region overlapping with the antenna region 22 in a plan view among the conductive layer 61 formed on the upper surface of the resin sealing layer 3 by dicer, leuter, or laser processing. Material is removed (removal step).
- the shield layer 6 is formed by the conductive layer 61 only in a region overlapping the wireless region 21 in plan view.
- the resin sealing layer in the region overlapping the antenna region 22 so that the thickness H1 of the region overlapping the antenna region 22 of the resin sealing layer 3 is thinner than the thickness H2 of the region overlapping the radio region 21. Part of 3 is removed together with the conductive material. Therefore, a step 32 is formed in the resin sealing layer 3 at the boundary between the radio region 21 and the antenna region 22.
- a predetermined recognition mark 7 for recognizing the arrangement direction and type of the module 1 is formed on the upper surface of the resin sealing layer 3 so as to overlap the antenna region 22 in plan view by silk printing or laser printing. (Marking process).
- the resin sealing provided on the one main surface 2a of the substrate 2 so as to cover the electronic component 42 provided in the wireless region 21 and the antenna conductor 51 provided in the antenna region 22 is performed.
- the shield layer 6 is formed only in a region overlapping the radio region 21 in plan view. Therefore, the electromagnetic wave radiated from the wireless function unit 4 having the RF circuit 41 provided in at least one of the main surface 2a of the substrate 2 and the inside thereof is disposed in a region overlapping the wireless region 21 in plan view. It can be suppressed by the shield layer 6 formed on the upper surface of the resin sealing layer 3 on the radio area 21 side.
- the RF circuit 41 of the wireless function unit 4 can be protected from external electromagnetic noise. Therefore, since the conventional metal case is unnecessary, the module 1 can be reduced in size.
- the shield layer 6 can suppress radiation of electromagnetic waves from the wireless function unit 4 arranged in a region overlapping the wireless region 21 in plan view. Therefore, the cost of the module 1 can be reduced. Further, the shield layer 6 is formed only in a region overlapping the wireless region 21 in plan view on the upper surface of the resin sealing layer 3. Therefore, for example, when compared with a configuration in which the shield layer 6 and the antenna conductor 51 are arranged at positions where they overlap each other in plan view, the antenna characteristics of the antenna formed by the antenna conductor 51 are deteriorated by the grounded shield layer 6. Can be suppressed, and the antenna characteristics can be improved.
- the thickness of the resin sealing layer 3 that overlaps the antenna region 22 side where the antenna unit 5 is disposed is thin. Therefore, it is possible to suppress deterioration of the antenna characteristics of the antenna formed by the antenna conductor 51 due to the resin sealing layer 3 covering the antenna region 22. Therefore, the antenna characteristics of the antenna formed by the antenna conductor 51 can be improved.
- the shield layer 6 is formed to extend in the groove 31 formed in the resin sealing layer 3 at the boundary between the radio region 21 and the antenna region 22. Therefore, it is possible to improve the shielding effect of the shield layer 6 that shields radiation from the wireless function unit 4 arranged in a region overlapping the wireless region 21 in plan view. Therefore, it is possible to improve the isolation characteristics between the wireless function unit 4 disposed in the region overlapping the wireless region 21 in plan view and the antenna unit 5 disposed in the region overlapping the antenna region 22 in plan view. .
- the shield layer 6 is formed so as to extend on all side surfaces of the resin sealing layer 3 surrounding the radio area 21, the radio arranged in the area overlapping the radio area 21 in plan view.
- the shield effect of the shield layer that shields radiation from the functional unit 4 can be further improved.
- a predetermined recognition mark 7 for recognizing the arrangement direction of the module 1 and the type of the module 1 is formed in a region where the shield layer 6 overlapping the antenna region 22 in plan view is not formed. Is formed. Therefore, the space on the surface of the module 1 can be effectively used. Therefore, it is not necessary to newly secure a space for forming the predetermined recognition mark 7 in the module 1, so that the module 1 can be reduced in size.
- the conductive layer 61 that covers the surface of the resin sealing layer 3 formed on the one principal surface 2a of the substrate 2 so as to cover the radio region 21 and the antenna region 22 is conductive. Formed of material. Then, in the conductive layer 61 formed on the upper surface of the resin sealing layer 3, the conductive material in the region overlapping the antenna region 22 in plan view is removed, so that the wireless region is formed on the upper surface of the resin sealing layer 3.
- the shield layer 6 made of the conductive layer 61 is formed only in a region overlapping with 21 in plan view.
- the shield layer 6 formed on the upper surface of the resin sealing layer 3 on the wireless region 21 side causes the electromagnetic wave radiated from the wireless function unit 4 having the RF circuit 41 disposed in a region overlapping the wireless region 21 in plan view.
- the antenna-integrated radio module 1 that can be suppressed and does not require a conventional metal case and can be reduced in size can be easily manufactured.
- the resin sealing layer 3 that overlaps the antenna region 22 side where the antenna unit 5 is disposed is formed thin, so that the antenna characteristics of the antenna formed by the antenna conductor 51 are changed to the antenna region 22. It can suppress that it deteriorates with the resin sealing layer 3 which coat
- the groove 31 is formed in the resin sealing layer 3 along the boundary between the wireless region 21 and the antenna region 22, and therefore, the resin on the wireless region 21 side is formed by the inner surface of the groove 31.
- a side surface facing the antenna region 22 side is formed in the sealing layer 3. Therefore, in the conductive layer forming step, the conductive layer 61 is formed on the inner side surface of the groove 31, so that the shield layer 6 is extended to the side surface facing the antenna region 22 side of the resin sealing layer 3 on the wireless region 21 side. It can be formed easily.
- a predetermined area for recognizing the arrangement direction of the module 1 and the type of the module 1 in an area where the shield layer 6 overlapping the antenna area 22 in plan view is not formed. Therefore, the space on the surface of the module 1 can be effectively used.
- the wireless function unit 4 connected to the signal electrode 25 is provided.
- the characteristics and the characteristics of the antenna conductor 51 (antenna unit 5) connected to the antenna electrode 26 can be independently separated and inspected individually. Therefore, at the time of product shipment, it is generally possible to separate the antenna unit 5 having a large variation in its characteristics and independently evaluate the characteristics of only the wireless function unit 4.
- the signal electrode 25 and the antenna electrode 26 are connected using the wiring pattern on the other mounting substrate side, and the wireless function unit 4 and the antenna unit 5 (antenna The conductor 51) can be easily connected. Further, even when the resin sealing layer 3 is provided on the one main surface 2a of the substrate 2, a high-frequency connector or the like is not required as in the prior art, so that the characteristics of the wireless function unit 4 and the antenna unit 5 are independent of each other. Can be evaluated.
- the wireless function unit 4 and the antenna unit 5 can be connected via a matching circuit, a switching circuit, a filter circuit, an attenuator, or the like provided on the other mounting board side.
- the mounting of the matching circuit on the substrate 2 can be omitted.
- the antenna characteristics of the antenna formed by the antenna conductor 51 can be easily adjusted by a matching circuit or attenuator connected to the antenna conductor 51. Further, depending on the situation, it is possible to connect the antenna provided on the other mounting substrate side and the radio function unit 4 without connecting the radio function unit 4 and the antenna unit 4. The degree of freedom in designing the device on which 1 is mounted is improved.
- the antenna characteristics of the antenna conductor 51 provided in the antenna unit 5 are subject to interference from objects and hands arranged in all directions of the antenna conductor 51. That is, when a person uses the case of the device on which the antenna integrated wireless module 1 is mounted in his / her hand, the antenna characteristics and directivity of the antenna conductor 51 have an effect on the hand of the person holding the case of the device. As a result, it may be difficult to maintain stable communication quality.
- the shield layer 6 is further formed on the side surface of the resin sealing layer 3 surrounding the antenna region 22. Therefore, even when the hand is approaching from the outer surface side of the antenna region 22, the influence on the antenna characteristics and the antenna directivity by the shield layer 6 can be suppressed to the minimum. It is possible to provide an antenna-integrated wireless module 1 including the above.
- the conductive layer 61 is formed by filling the grooves 31 and 33 formed in the groove forming step with a conductive paste or by applying a conductive paste to the inner side surfaces of the grooves 31 and 33. Therefore, by adjusting the position where the grooves 31 and 33 are formed and the depth from the upper surface of the resin sealing layer 3, the configuration such as the position where the shield layer 6 is formed and the shape thereof can be arbitrarily changed. Can do.
- grooves 33 formed around the formation region of the module 1 are formed in the resin sealing layer 3 provided on the one main surface 2 a of the assembly of the substrates 2.
- the position and shape of the shield layer 6 provided to extend from the upper surface of the resin sealing layer 3 to the outer surface can be arbitrarily changed.
- FIG. 3C if the width or depth of the groove 31 formed in the resin sealing layer 3 is changed along the boundary between the wireless region 21 and the antenna region 22, the resin sealing is performed.
- the position and shape of the shield layer 6 formed in the boundary region between the radio region 21 and the antenna region 22 of the stop layer 3 can be arbitrarily changed.
- the thickness H1 of the resin sealing layer 3 on the antenna region 22 side is adjusted. It can be changed easily.
- the antenna-integrated wireless module 1 is manufactured, so that the upper surface of the resin sealing layer 3 on the wireless region 21 side is formed. Only the module 1 provided with the shield layer 6 can be mass-produced very efficiently.
- Modification (1) 4 is a perspective view showing a modification of the module of FIG. 1
- FIG. 5 is a cross-sectional view of the module of FIG. 4
- FIG. 6 is a diagram showing an example of a manufacturing method of the module of FIG.
- This modification (1) is different from the first embodiment described with reference to FIG. 1 in that a part of the resin sealing layer 3 that overlaps the antenna region 22 is not removed in the removing step, and the resin sealing is performed.
- the thickness of the stop layer 3 is uniform.
- the groove 33 is not formed at a position corresponding to the end surface on the antenna portion 5 (antenna region 22) side in the longitudinal direction of the module 1. Therefore, in the example shown in FIGS. 4 to 6, the shield layer 6 is not formed at a position corresponding to the end face on the antenna portion 5 (antenna region 22) side in the longitudinal direction of the module 1.
- the time for removing a part of the resin sealing layer 3 in the removing step can be shortened, so that the manufacturing time of the module 1 and the manufacturing cost can be reduced. Since other configurations are the same as those of the above-described embodiment, description of the configurations is omitted by assigning the same reference numerals.
- the recognition mark 7 may be formed on the upper surface of the resin sealing layer 3.
- the recognition mark 7 may be formed similarly in each modified example and each embodiment described below, but the description thereof is omitted in the following description.
- Modification (2) 7 is a cross-sectional view showing a modification of the module of FIG. 1, and FIG. 8 is a view showing an example of a method for manufacturing the module of FIG.
- This modification (2) differs from the modification (1) described with reference to FIG. 4 in that, as shown in FIG. 7 and FIG.
- the groove 31 is not formed in the resin sealing layer 3 at the boundary.
- the shield layer 6 is not formed so as to extend at the boundary portion between the radio region 21 and the antenna region 22. Since other configurations are the same as those of the above-described embodiment, description of the configurations is omitted by assigning the same reference numerals.
- Modification (3) 9 is a perspective view showing a modification of the module of FIG. 1
- FIG. 10 is a cross-sectional view of the module of FIG. 9
- FIG. 11 is a diagram showing an example of a method for manufacturing the module of FIG.
- This modification (3) is different from the modification (2) described with reference to FIG. 7 in that the thickness H1 of the region overlapping the antenna region 22 of the resin sealing layer 3 is different from that shown in FIGS.
- the step 32 is formed in the resin sealing layer 3 at the boundary between the radio area 21 and the antenna area 22 so as to be thinner than the thickness H2 of the area overlapping the radio area 21.
- FIGS. 9 to 11 as in the examples shown in FIGS.
- FIG. 12 is a perspective view showing an antenna-integrated radio module according to the second embodiment of the present invention.
- FIG. 13 is a diagram showing an example of a method of manufacturing the module of FIG. 12, and (a) to (d) show different states.
- the module 1a in this embodiment differs from the first embodiment described above in that, as shown in FIGS. 12 and 13 (c) and 13 (d), in the conductive layer forming step, a conductive paste is formed in the grooves 31 and 33.
- the conductive layer 61 is formed on the inner surfaces of the grooves 31 and 33 without being filled. Further, in the groove forming step, the groove 31 is formed deeper than the thickness of the resin sealing layer 3.
- the conductive layer 61 may be formed on the inner surfaces of the grooves 31 and 33 by a general thin film forming technique such as sputtering or plating. Since the other configuration is the same as that of the first embodiment described above, description of the configuration is omitted by attaching the same reference numerals.
- the module 1a of this embodiment is manufactured as described below, similarly to the module 1 of the first embodiment described above.
- the wireless function unit 4 disposed in the wireless region 21 and the antenna unit 5 disposed in the antenna region 22 are included so as to cover the wireless region 21 and the antenna region 22.
- the resin sealing layer 3 is formed (sealing process).
- grooves 31 and 33 are formed in the resin sealing layer 3 by a general apparatus such as a dicer (groove forming step).
- a conductive layer 61 covering the surface of the resin sealing layer 3 including the inner surfaces of the grooves 31 and 33 is formed by a conductive paste (conductive material) (conductive).
- Layer forming step a conductive paste (conductive material) (conductive).
- FIG. 3D the conductive material in the region overlapping the antenna region 22 in plan view is removed from the conductive layer 61 formed on the upper surface of the resin sealing layer 3 (removal step). ).
- the shield layer 6 is formed by the conductive layer 61 only in a region overlapping the wireless region 21 in plan view.
- the shield layer 6 is formed on all side surfaces of the resin sealing layer 3 surrounding the antenna region 22, as in the first embodiment described above.
- the resin sealing layer 3 in the region overlapping the antenna region 22 is formed such that the thickness of the region overlapping the antenna region 22 of the resin sealing layer 3 is thinner than the thickness of the region overlapping the radio region 21. A portion is removed along with the conductive material. Therefore, a step 32 is formed in the resin sealing layer 3 at the boundary between the radio region 21 and the antenna region 22.
- a marking step for forming a predetermined recognition mark 7 in a region overlapping the antenna region 22 in plan view on the upper surface of the substrate 2 of the resin sealing layer 3 may be performed.
- the assembly of the substrates 2 is separated into pieces along the cutting line CL, thereby completing the module 1a.
- FIG. 14 is a perspective view showing a modification of the module of FIG.
- This modified example (4) differs from the second embodiment described with reference to FIG. 12 in that the groove 31 is formed in the groove forming step as in the modified example (3) described with reference to FIG. That is not the point. Therefore, in the example shown in FIG. 14, the shield layer 6 is not formed on the resin sealing layer 3 at the boundary portion between the radio region 21 and the antenna region 22. Since other configurations are the same as those of the above-described embodiment, description of the configurations is omitted by assigning the same reference numerals.
- FIG. 15 is a cross-sectional view showing an antenna-integrated radio module according to a third embodiment of the present invention.
- the module 1b in this embodiment differs from the first embodiment described with reference to FIG. 1 in that the connection method between the shield layer 6 and the ground electrode 27 is different. Further, the shield layer 6 is not formed on the side surface on the antenna region 22 side in the longitudinal direction of the module 1b. Since the other configuration is the same as that of the first embodiment described above, description of the configuration is omitted by attaching the same reference numerals.
- electrode posts 28 are provided by burying electrode pins in the resin sealing layer 3.
- the ground electrode 27 is connected to the shield layer 6 via the via conductor 23 and the electrode post 28.
- the ground electrode 27 and the shield layer 6 are formed by a via conductor formed by filling the via hole (via hole) formed in the resin sealing layer 3 with a conductive paste. It may be connected.
- the same effects as those of the first embodiment described above can be obtained.
- the groove 31 is not formed in the resin sealing layer 3, and the shield layer 6 is not extended and arranged at the boundary between the radio region 21 and the antenna region 22. Also good.
- FIG. 16 is a perspective view showing an antenna-integrated radio module according to the fourth embodiment of the present invention.
- the module 1c in this embodiment is different from the first embodiment described with reference to FIG. 1 in that the plurality of antenna regions 22 are arranged on one side of the substrate 2 so as to sandwich the wireless region 21 as shown in FIG. This is a point provided on the surface 2a.
- each antenna region 22 is a region overlapping in plan view, and an antenna conductor 51 (not shown) is provided on at least one of the main surface 2a of the substrate 2 and the inside thereof.
- the shield layer 6 is provided so as to extend from the radio region 21 side to the antenna region 22 side over the entire surface of both side surfaces of the module 1 c in the short direction. Since the other configuration is the same as that of the first embodiment described above, description of the configuration is omitted by attaching the same reference numerals.
- the antenna integrated radio module 1c corresponding to communication by diversity or carrier aggregation is provided by using a plurality of antennas formed by the antenna conductors 51 provided in areas overlapping each antenna area 22 in plan view. be able to. Further, by making each antenna correspond to a predetermined communication method and a predetermined frequency band, it is possible to provide the antenna-integrated radio module 1c compatible with multiband and multimode.
- FIG. 17 is sectional drawing which shows the antenna integrated radio module concerning 5th Embodiment of this invention.
- the module 1d in this embodiment is different from the first embodiment described with reference to FIG. 1 in that the radio functional unit 4 and the antenna conductor 51 are connected to one main surface 2a of the substrate 2 or the like as shown in FIG. This is that they are connected by a wiring pattern formed by a via conductor 23 and an electrode pattern 24 provided inside. Since the other configuration is the same as that of the first embodiment described above, description of the configuration is omitted by attaching the same reference numerals.
- the electromagnetic wave radiated from the wireless function unit 4 having the RF circuit 41 can be suppressed by the shield layer 6 formed on the upper surface of the resin sealing layer 3 on the wireless region 21 side.
- the same effects as those of the first embodiment can be obtained.
- FIG. 18 is a sectional view showing an antenna integrated radio module according to the sixth embodiment of the present invention.
- the module 1e in this embodiment is most different from the first embodiment described with reference to FIG. 1 in that the antenna electrode connected to the antenna unit 5 is connected to one end of the antenna conductor 51 as shown in FIG.
- the other end antenna electrode 26b is connected to the other end of the antenna conductor 51.
- the shield electrode 6 is provided over the entire area of both side surfaces in the short direction of the module 1e (side surfaces on the back side and the near side toward the paper surface of FIG. 18). It is formed to extend from the 21 side to the antenna region 22 side. Since the other configuration is the same as that of the first embodiment described above, description of the configuration is omitted by attaching the same reference numerals.
- antennas are often designed with an open end configuration. For this reason, generally the input impedance of the antenna seen from the connector terminal for measurement etc. can be measured. However, it has been difficult to confirm the state of the antenna conductor such as the passing characteristics of the antenna by confirming the path loss of the antenna.
- the conventional antenna by using the antenna electrode for one end connected to one end of the antenna conductor 51 and the antenna electrode for other end connected to the other end of the antenna conductor 51, the conventional antenna The transmission characteristic of the transmission line of the antenna conductor 51 that could not be evaluated can be confirmed. Therefore, for example, when the product is shipped, the manufacturing accuracy of the antenna unit 5 can be easily determined based on the measured passing characteristics of the antenna conductor 51.
- the resin sealing layer 3 and the shield layer 6 can be formed in various forms. Further, the above-described embodiments are modified as shown in FIGS. be able to. 19 to 24 are diagrams showing modifications of the antenna-integrated radio module. In the following description, differences from the above-described embodiments will be mainly described, and other configurations will be denoted by the same reference numerals, and description of the configurations will be omitted.
- the module 1 shown in FIG. 19 is different from the example shown in FIG. 1 in that the shield layer 6 is not formed on the resin sealing layer 3 at the boundary between the radio region 21 and the antenna region 22.
- the module 1a shown in FIG. 22 differs from the example shown in FIG. 20 in that when the module 1a is separated into pieces, the conductive layer 61 and the substrate 2 at the boundary between the radio area 21 and the antenna area 22 are ground. Thus, the shield layer 6 on the radio area 21 side and the shield layer 6 on the antenna area 22 side are electrically insulated. In each of the embodiments described above, even if the shield layer 6 on the radio area 21 side and the shield layer 6 on the antenna area 22 side are electrically insulated by removing a part of the shield layer 6. Good.
- the module 1 shown in FIG. 23 differs from the example shown in FIG. 1 in that the groove 31 is formed so that its depth reaches one main surface 2 a of the substrate 2. Further, the module 1 shown in FIG. 24 is different from the example shown in FIG. 1 in that the groove 31 is formed by grinding the substrate 2 together with the resin insulating layer 3 in the groove forming step. Therefore, in the example shown in FIG. 24, the shield layer 6 is formed so as to reach the inside of the substrate 2.
- the antenna conductor 51 is formed on the substrate 2.
- the shield layer 6 on the inner surface of the groove 31 by making the depth of the groove 31 the same as the thickness of the resin sealing layer 3 or deeper than the thickness of the resin sealing layer 3.
- the wireless function unit 4 and the antenna unit 5 are partitioned by the shield layer 6. Therefore, it is possible to suppress the electromagnetic wave radiated from the wireless functional component such as the RF circuit 41 from entering the antenna unit 5 and to suppress the electromagnetic wave radiated from the wireless functional component from adversely affecting the antenna unit 5.
- the groove 31 may be formed in the same manner as in the example shown in FIGS.
- a plurality of antenna-integrated radio modules are integrally formed by using the assembly of the substrates 2 and then separated into individual pieces, whereby the antenna-integrated radio modules are manufactured. May be manufactured.
- the wireless function unit 4 is disposed in a region overlapping the wireless region 21 in plan view
- the antenna unit 5 is disposed in a region overlapping the antenna region 22 in plan view.
- the antenna section may further include a matching circuit connected to the feeding point of the antenna conductor 51.
- the antenna-integrated radio module may be configured as follows, for example. That is, the wireless function unit 4 having the RF circuit 41 and the antenna unit 5 having the antenna conductor 51 are arranged separately on both sides in the longitudinal direction of the antenna-integrated wireless module, and between the wireless region 21 and the antenna region 22.
- a filter circuit such as a switch IC or a SAW filter may be arranged on the transmission line at the boundary portion.
- the conductive material for forming the shield layer and the antenna conductor is not limited to the above example, and various commonly used materials can be used.
- the antenna integrated radio module mounted on the other mounting board is resin-sealed on the other mounting board. It may be.
- the shield layer 6 should just be formed in the area
- the present invention can be widely applied to an antenna-integrated radio module including a radio function unit having an RF circuit and an antenna unit having an antenna conductor, and a manufacturing method thereof.
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Abstract
Description
本発明の第1実施形態について図1~図3を参照して説明する。図1は本発明の第1実施形態にかかるアンテナ一体型無線モジュールを示す斜視図、図2は図1のモジュールの断面図である。また、図3は図1のモジュールの製造方法の一例を示す図であり、(a)~(f)はそれぞれ異なる状態を示す。また、図1では、理解を容易なものとするために、シールド層6を点で塗りつぶしている。なお、後の説明で参照する図4,9,12,14,16,19,20~22についても、同様に、シールド層6(導電層61)を点で塗りつぶしているが、後の説明ではその説明は省略する。
アンテナ一体型無線モジュール1(以下、単に「モジュール」と称する)は、携帯電話やスマートフォン、タブレットなどの通信携帯端末(図示省略)が備える実装基板に搭載されるものであり、例えば、GSM(登録商標)規格、W-CDMA規格、LTE規格、Bluetooth(登録商標)規格など、それぞれ異なる通信規格による通信を行う複数の通信システムや、それぞれ同一の通信規格で異なるバンド(周波数帯域)において通信を行う複数の通信システムを備え、複数の通信規格により複数の周波数帯域を利用して通信を行うマルチモード、マルチバンドに対応した通信携帯端末に搭載される。
アンテナ一体型無線モジュール1の製造方法の各工程について説明する。
次に、溝形成工程により形成される溝31,33の構成を変更したり、除去工程において除去されるアンテナ領域22側の樹脂封止層6の量を変更することにより形成されるアンテナ一体型無線モジュールの変形例について図4~図11を参照して説明する。なお、溝形成工程および除去工程の構成を変更することにより形成されるモジュールの変形例は、以下に例示する変形例に限定されるものではない。
図4は図1のモジュールの変形例を示す斜視図、図5は図4のモジュールの断面図、図6は図4のモジュールの製造方法の一例を示す図である。この変形例(1)が図1を参照して説明した第1実施形態と異なるのは、除去工程において、アンテナ領域22に重なる樹脂封止層3の一部が除去されておらず、樹脂封止層3の厚みが均一である点である。また、図4および図5に示すように、溝形成工程において、モジュール1の長手方向におけるアンテナ部5(アンテナ領域22)側の端面に相当する位置に溝33が形成されていない。したがって、図4~図6に示す例では、モジュール1の長手方向におけるアンテナ部5(アンテナ領域22)側の端面に相当する位置にシールド層6が形成されていない。
図7は図1のモジュールの変形例を示す断面図、図8は図7のモジュールの製造方法の一例を示す図である。この変形例(2)が図4を参照して説明した変形例(1)と異なるのは、図7および図8に示すように、溝形成工程において、無線領域21とアンテナ領域22との間の境界の樹脂封止層3に溝31が形成されていない点である。したがって、図7および図8に示す例では、図4~図6に示す例と異なり、無線領域21とアンテナ領域22との間の境界部分にシールド層6が延出して形成されていない。その他の構成は上記した実施形態と同様であるため、同一符号を付すことによりその構成の説明は省略する。
図9は図1のモジュールの変形例を示す斜視図、図10は図9のモジュールの断面図、図11は図9のモジュールの製造方法の一例を示す図である。この変形例(3)が図7を参照して説明した変形例(2)と異なるのは、図9~図11に示すように、樹脂封止層3のアンテナ領域22に重なる領域の厚みH1が、無線領域21に重なる領域の厚みH2よりも薄く形成されて、無線領域21とアンテナ領域22との間の境界の樹脂封止層3に段差32が形成されている点である。また、図9~図11に示す例では、図7および図8に示す例と同様に、モジュール1の短手方向における両側面の全面に渡って、無線領域21側からアンテナ領域22側に延出してシールド層6が設けられている。その他の構成は上記した実施形態と同様であるため、同一符号を付すことによりその構成の説明は省略する。
本発明の第2実施形態について図12および図13を参照して説明する。図12は本発明の第2実施形態にかかるアンテナ一体型無線モジュールを示す斜視図である。図13は図12のモジュールの製造方法の一例を示す図であり、(a)~(d)はそれぞれ異なる状態を示す。
図14は図12のモジュールの変形例を示す斜視図である。この変形例(4)が図12を参照して説明した第2実施形態と異なるのは、図9を参照して説明した変形例(3)と同様に、溝形成工程において溝31が形成されていない点である。したがって、図14に示す例では、無線領域21とアンテナ領域22との間の境界部分において樹脂封止層3にシールド層6が形成されていない。その他の構成は上記した実施形態と同様であるため、同一符号を付すことによりその構成の説明は省略する。
本発明の第3実施形態について図15を参照して説明する。図15は本発明の第3実施形態にかかるアンテナ一体型無線モジュールを示す断面図である。
本発明の第4実施形態について図16を参照して説明する。図16は本発明の第4実施形態にかかるアンテナ一体型無線モジュールを示す斜視図である。
本発明の第5実施形態について図17を参照して説明する。図17は本発明の第5実施形態にかかるアンテナ一体型無線モジュールを示す断面図である。
本発明の第6実施形態について図18を参照して説明する。図18は本発明の第6実施形態にかかるアンテナ一体型無線モジュールを示す断面図である。
上記した各実施形態に示すように、種々の形態で樹脂封止層3およびシールド層6を形成することができるが、さらに、上記した各実施形態を図19~図24に示すように変形することができる。図19~図24は、それぞれ、アンテナ一体型無線モジュールの変形例を示す図である。なお、以下では、上記した各実施形態と異なる点を中心に説明を行い、その他の構成については、同一符号を付すことによりその構成の説明は省略する。
2 基板
2a 一方主面
21 無線領域
22 アンテナ領域
25 信号電極
26 アンテナ電極
26a 一方端用アンテナ電極
26b 他方端用アンテナ電極
3 樹脂封止層
31 溝
32 段差
4 無線機能部
41 RF回路
5 アンテナ部
51 アンテナ導体
6 シールド層
61 導電層
7 認識マーク
H1 厚み
Claims (17)
- 無線領域とアンテナ領域とが一方主面側からの平面視において異なる位置に配置された基板と、
前記無線領域に配置され、前記基板の一方主面およびその内部の少なくともいずれか一方に設けられたRF回路を有する無線機能部と、
前記アンテナ領域に配置され、前記基板の一方主面およびその内部の少なくともいずれか一方に設けられたアンテナ導体を有するアンテナ部と、
前記無線領域および前記アンテナ領域の前記基板の一方主面側を少なくとも被覆するように前記基板の一方主面に設けられた樹脂封止層と、
少なくとも前記樹脂封止層の上面の前記アンテナ領域の直上部分を被覆しないようにして前記樹脂封止層の表面に形成されたシールド層と
を備えることを特徴とするアンテナ一体型無線モジュール。 - 前記シールド層は、前記樹脂封止層の上面において、前記無線領域に前記平面視で重なる領域にのみ形成されていることを特徴とする請求項1に記載のアンテナ一体型無線モジュール。
- 前記樹脂封止層の前記アンテナ領域と前記平面視で重なる部分の厚みが、前記無線領域と前記平面視で重なる部分の厚みよりも薄く形成され、前記無線領域と前記アンテナ領域との間の前記樹脂封止層に段差が形成されていることを特徴とする請求項1または2に記載のアンテナ一体型無線モジュール。
- 前記シールド層は、前記樹脂封止層の前記段差部分の側面にも延出して形成されていることを特徴とする請求項3に記載のアンテナ一体型無線モジュール。
- 前記樹脂封止層に、前記段差部分の側面に沿って前記基板の一方主面に近接または到達する溝が形成され、前記シールド層は、前記溝の内側面に延出して形成されていることを特徴とする請求項3または4に記載のアンテナ一体型モジュール。
- 前記無線領域を囲む前記樹脂封止層の側面に前記シールド層が延出して形成されていることを特徴とする請求項1ないし5のいずれかに記載のアンテナ一体型無線モジュール。
- 前記アンテナ領域側の前記樹脂封止層の上面に、所定の認識マークが形成されていることを特徴とする請求項1ないし6のいずれかに記載のアンテナ一体型無線モジュール。
- 複数の前記アンテナ領域が、前記無線領域を挟むように前記基板に設けられ、前記各アンテナ領域それぞれにおいて、前記基板の一方主面およびその内部の少なくともいずれか一方に前記アンテナ導体がそれぞれ設けられていることを特徴とする請求項1ないし7のいずれかに記載のアンテナ一体型無線モジュール。
- 前記アンテナ領域を囲む前記樹脂封止層の側面の少なくとも一部に前記シールド層がさらに形成されていることを特徴とする請求項1ないし8のいずれかに記載のアンテナ一体型無線モジュール。
- 前記基板の他方主面に、前記アンテナ部と接続されたアンテナ電極と、前記無線機能部と接続された信号電極とが設けられていることを特徴とする請求項1ないし9のいずれかに記載のアンテナ一体型無線モジュール。
- 前記アンテナ電極は、前記アンテナ導体の一方端と接続された一方端用アンテナ電極と、前記アンテナ導体の他方端と接続された他方端用アンテナ電極とを備えることを特徴とする請求項10に記載のアンテナ一体型無線モジュール。
- 無線領域とアンテナ領域とが一方主面側からの平面視において異なる位置に配置された基板であって、前記無線領域に配置され、前記基板の一方主面およびその内部の少なくともいずれか一方に設けられたRF回路を有する無線機能部と、前記アンテナ領域に配置され、前記基板の一方主面およびその内部の少なくともいずれか一方に設けられたアンテナ導体を有するアンテナ部とが設けられた前記基板を用意する用意工程と、
前記基板の一方主面側の全てを被覆するように前記基板の一方主面の全面に渡って樹脂を付与して樹脂封止層を形成する封止工程と、
導電性材料により前記樹脂封止層の表面を被覆する導電層を形成する導電層形成工程と、
前記樹脂封止層の上面に形成された前記導電層のうち、前記アンテナ領域側の導電性材料を除去することにより、少なくとも前記樹脂封止層の上面の前記アンテナ領域の直上部分を被覆しないようにして前記樹脂封止層の表面に前記導電層によりシールド層を形成する除去工程と
を備えることを特徴とするアンテナ一体型無線モジュールの製造方法。 - 前記除去工程において、前記樹脂封止層の上面において前記無線領域に前記平面視で重なる領域にのみ前記導電層によりシールド層を形成することを特徴とする請求項12に記載のアンテナ一体型無線モジュールの製造方法。
- 前記除去工程において、前記アンテナ領域側における前記樹脂封止層の厚みが、前記無線領域側の厚みよりも薄くなるように、前記アンテナ領域側の前記樹脂封止層の一部を導電性材料と一緒に除去することを特徴とする請求項12または13に記載のアンテナ一体型無線モジュールの製造方法。
- 前記封止工程の後であって、前記導電層形成工程の前に、前記無線領域と前記アンテナ領域との間において前記樹脂封止層に溝を形成する溝形成工程をさらに備え、前記導電層形成工程において、前記溝形成工程において形成された前記溝の内側面にも前記導電層が形成されることを特徴とする請求項12ないし14のいずれかに記載のアンテナ一体型無線モジュールの製造方法。
- 前記除去工程の後に、前記アンテナ領域側の前記樹脂封止層の上面に、所定の認識マークを形成するマーキング工程をさらに備えることを特徴とする請求項12ないし15のいずれかに記載のアンテナ一体型無線モジュールの製造方法。
- 前記用意工程において前記基板の集合体を用意し、前記工程の全てが実行された後に前記基板の集合体を前記基板単位に個片化することを特徴とする請求項12ないし16のいずれかに記載のアンテナ一体型無線モジュールの製造方法。
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Also Published As
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US9887454B2 (en) | 2018-02-06 |
US11108152B2 (en) | 2021-08-31 |
US20160149300A1 (en) | 2016-05-26 |
US20180115061A1 (en) | 2018-04-26 |
CN105409060A (zh) | 2016-03-16 |
US20200144715A1 (en) | 2020-05-07 |
CN105409060B (zh) | 2018-09-04 |
JP2018026825A (ja) | 2018-02-15 |
JP6469572B2 (ja) | 2019-02-13 |
US10581157B2 (en) | 2020-03-03 |
JPWO2015015863A1 (ja) | 2017-03-02 |
JP6489182B2 (ja) | 2019-03-27 |
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