WO2005006548A1 - 圧電デバイスとその製造方法 - Google Patents
圧電デバイスとその製造方法 Download PDFInfo
- Publication number
- WO2005006548A1 WO2005006548A1 PCT/JP2004/009810 JP2004009810W WO2005006548A1 WO 2005006548 A1 WO2005006548 A1 WO 2005006548A1 JP 2004009810 W JP2004009810 W JP 2004009810W WO 2005006548 A1 WO2005006548 A1 WO 2005006548A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- piezoelectric element
- package
- piezoelectric
- plate
- longitudinal direction
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 21
- 238000003825 pressing Methods 0.000 claims abstract description 6
- 238000000605 extraction Methods 0.000 claims description 20
- 230000005284 excitation Effects 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 230000007423 decrease Effects 0.000 claims description 6
- 238000001179 sorption measurement Methods 0.000 claims description 4
- 239000013078 crystal Substances 0.000 description 51
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 239000010931 gold Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000005304 joining Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 238000005219 brazing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910001020 Au alloy Inorganic materials 0.000 description 1
- 229910001128 Sn alloy Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 239000002091 nanocage Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
- H03H9/02—Details
- H03H9/05—Holders or supports
- H03H9/10—Mounting in enclosures
- H03H9/1007—Mounting in enclosures for bulk acoustic wave [BAW] devices
- H03H9/1014—Mounting in enclosures for bulk acoustic wave [BAW] devices the enclosure being defined by a frame built on a substrate and a cap, the frame having no mechanical contact with the BAW device
- H03H9/1021—Mounting in enclosures for bulk acoustic wave [BAW] devices the enclosure being defined by a frame built on a substrate and a cap, the frame having no mechanical contact with the BAW device the BAW device being of the cantilever type
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
- H03H9/15—Constructional features of resonators consisting of piezoelectric or electrostrictive material
- H03H9/17—Constructional features of resonators consisting of piezoelectric or electrostrictive material having a single resonator
- H03H9/19—Constructional features of resonators consisting of piezoelectric or electrostrictive material having a single resonator consisting of quartz
Definitions
- the present invention c on the usefulness of a piezoelectric device and a manufacturing method thereof in ultrasonic bonding
- a piezoelectric device having a structure in which stud bumps are used to support a piezoelectric element plate has been devised (see, for example, JP-A-8-298423).
- a gap is formed between the piezoelectric element plate and a member to which the piezoelectric element plate is attached by stud bumps.
- the gap can absorb horizontal distortion caused by a difference in thermal expansion coefficient between the piezoelectric element and the mounting member. Also, there is an effect that the piezoelectric element plate is joined to the package while keeping the horizontal attitude.
- thermocompression bonding method and an ultrasonic welding method of a piezoelectric element using bumps are already known (see, for example, JP-A-10-284972).
- the ultrasonic welding method is more efficient because the heating temperature can be lower than the thermocompression bonding method.
- a flat plate is generally used in order to obtain high-frequency vibrations.
- the method described in 84972 can be applied. While obtaining relatively low frequency vibration.
- the vibration energy is lost due to the shape of the AT plate. Therefore, in order to reduce the vibration energy loss, the AT plate is subjected to bevel processing or convex processing.
- the piezoelectric element when the piezoelectric element is attached to the package by suctioning the nozzle with the nozzle, the piezoelectric element is inclined and comes into contact with the electronic components such as the nanocage or the IC mounted on the package, making mounting difficult. Can also occur. This is because the mounting reference surface of the crystal blank is unstable, for example, it is attracted by horns during mounting.
- the excitation electrode portion near the center of the piezoelectric element plate has a shape of a flat plate or a shape close to a flat plate, if the vicinity of the center is sucked by a suction nozzle, the piezoelectric element plate is almost stably placed in a horizontal state.
- the excitation electrode mounted on the upper surface of the piezoelectric element plate may be damaged by adsorbing this portion.
- An object of the present invention is to provide a method of manufacturing a piezoelectric device in which a piezoelectric element plate is mounted on a package and bonded, which enables stable bonding without damaging an excitation electrode important for device characteristics, and A piezoelectric device.
- the piezoelectric plate constituting the piezoelectric device has a rectangular shape in a top view, and one surface is formed flat and the other surface is long. Processing is performed so that the thickness of the both ends in the direction becomes gradually smaller according to the directional force on the end face.
- the package and the piezoelectric element are joined to each other via a bump formed between the upper surface of the package and one end in the longitudinal direction of the non-flat surface of the piezoelectric element.
- a first aspect of the method for manufacturing a piezoelectric device according to the present invention is a method for manufacturing a piezoelectric device on a package.
- a piezoelectric element plate having a rectangular shape in a top view, an upper surface formed flat, and a lower surface formed on both ends in the longitudinal direction such that the thickness gradually decreases toward the end surface. Placing the piezoelectric element on a package so that one end of the lower surface in the longitudinal direction is connected to the package via the bump; and applying the piezoelectric element to the package. Bonding the piezoelectric element to the package via the bumps while applying pressure.
- one end in the longitudinal direction of the piezoelectric element plate is suctioned by a suction nozzle with the flat surface of the upper surface of the piezoelectric element as a reference position, and is placed on the package. And bonding the piezoelectric element to the package by applying ultrasonic waves while pressing the piezoelectric element against the package with the suction nozzle.
- a second aspect of the method for manufacturing a piezoelectric device according to the present invention is rectangular in a top view, the upper face is formed flat, and the lower face is formed at both ends in the longitudinal direction toward the end face.
- one end in the longitudinal direction of the upper surface of the piezoelectric plate is provided with an excitation electrode mounted on the upper surface of the piezoelectric plate.
- an excitation electrode mounted on the upper surface of the piezoelectric plate.
- the suction nozzle may have a recess at the tip end for sucking the piezoelectric plate while avoiding the lead electrode.
- the piezoelectric device of the present invention by virtue of bevel processing or convex processing at both ends in the longitudinal direction of one surface of the piezoelectric element plate, vibration energy is transferred to the inside of the piezoelectric element plate. Can be confined.
- the pressure by flattening the other surface of the piezoelectric element plate, when an arbitrary part of the flat surface is sucked by the suction noise, the pressure must be reduced. Since the element plate is located in a plane perpendicular to the axis of the suction nozzle, the piezoelectric element is mounted on the package while always maintaining a constant attitude with respect to the suction nozzle.
- the bevel shape ⁇ convex shape is related to the processing. Since the variation is extremely large, there is a risk that the posture of the piezoelectric plate with respect to the suction nozzle may be changed in various ways depending on the suction site. Adsorption also eliminates the risk of damaging the excitation electrodes there.
- the position where the suction nozzle sucks the piezoelectric element plate can be formed in advance between the cage and the piezoelectric element, and can be a position corresponding to the position of the bump. Therefore, the suction nozzle can suck the piezoelectric element in a fixed posture, press the piezoelectric element against the bumps, and apply ultrasonic waves to the bumps.
- FIG. 1 is a plan view showing an embodiment of a crystal resonator according to the present invention.
- FIG. 2 is a sectional view showing a section taken along line XX of FIG. 1.
- FIG. 3 is a top view, a bottom view, and a side view for explaining the shape of the crystal unit shown in FIG. 2;
- FIG. 3A is a cross-sectional view showing a state before a crystal blank is mounted on a package;
- End 4B is a cross-sectional view showing a state where the crystal piece is being mounted on the package.
- FIG. 5 is a sectional view showing a section taken along line YY of FIG. 4B.
- the crystal unit 1 includes a crystal blank 2 that is a piezoelectric element and is rectangular in a top view, a package 3 made of ceramics, and a lid member 5 that seals the package.
- the crystal blank 2 has a rectangular shape in a top view in which the direction of vibration displacement is a long side (dimension p) and the side perpendicular to it is a short side (dimension q).
- One face UF of this crystal blank 2 (hereinafter, referred to as UF The upper surface) is a flat surface, and the other surface LF (hereinafter referred to as the lower surface) is formed into a beveling arc shape in which the thickness decreases at both ends in the longitudinal direction as it moves toward the tip.
- a plurality of arcs c represent contour lines.
- the package 3 includes a cavity 3b having a step 3a on which the crystal blank 2 is placed.
- connection electrodes 31 and 32 are formed of metallized layers at portions corresponding to the extraction electrodes 21a and 22a of the crystal blank 2 placed thereon, respectively.
- connection electrodes 31, 32 and the terminal electrodes 33, 34 are electrically connected to each other by wiring (not shown) inside the package 3. Further, on the upper end surface of the package 3, a frame-shaped lid member joining portion 35 is formed with a metallized layer so as to surround the cavity 3b.
- Gold plating is applied to all of the connection electrodes 31, 32, the terminal electrodes 33, 34, and the metallized layer constituting the lid member joint 35.
- reference numeral 4 denotes a plurality of stud bumps formed of a wire containing Au as a main component, and ultrasonic waves are previously applied to the surfaces of the extraction electrodes 21 a and 22 a or the surfaces of the connection electrodes 31 and 32. And pressed by solid phase diffusion.
- the extraction electrode 21a and the connection electrode 31, and the extraction electrode 22a and the connection electrode 32 are joined via the stud bumps 4, 4, respectively.
- the cover member 5 has a flat plate shape, and a portion made of a metal material having a low melting point and a melting temperature such as an Au / Sn alloy is provided at a portion corresponding to the cover member joining portion 35 formed on the upper end surface of the package 3. Material layer 51 are formed in advance. As a result, since the brazing material layer 51 of the cover member 5 is joined to the cover material joining portion 35 of the package 3, the cavity 3b of the package 3 is kept airtight.
- the lid member 5 can be joined by various methods other than brazing, such as a seam welding method or a laser welding method. In addition to AuZSu, various joining materials such as low-melting glass can be used. It is possible.
- the surface whose thickness gradually decreases toward both ends in the longitudinal direction of the piezoelectric element is bonded to the package via bumps with the flat plate side of the upper surface as a mounting reference. If the device can be mounted with the top surface parallel to the package, and if a very thin piezoelectric device can be obtained, both ends of the bottom surface will be beveled. Therefore, it is possible to obtain stable vibration.
- FIGS. 1 and 2 a method of manufacturing the crystal resonator shown in FIGS. 1 and 2 will be described with reference to FIGS. 4A, 4B, and 5.
- a method of mounting the crystal blank 2 in the package 3 which is a feature of the present invention among the manufacturing methods of the crystal resonator will be described.
- reference numeral 6 denotes a tip portion of a vacuum suction nozzle that can apply ultrasonic waves
- 7 denotes a hot plate.
- the package 3 is placed on the hot plate 7 in order to preheat the package 3.
- stud bumps 4 are formed on the connection electrodes 31 and 32 of the package 3 using Au wires. Note that the formation of the stud bumps can be performed in advance in another process.
- the end of the upper surface (flat surface) of the crystal blank 2 on which the extraction electrode 21a is located is suction-held by the suction nozzle 6, and the crystal blank 2 is held as shown in FIG. 4A. Place it just above package 3.
- the surface of the crystal blank 2 is captured by a camera. By processing the image, it can be determined whether or not arc-shaped contour lines appear.
- the shapes of the excitation electrodes 21 and 22 and the extraction electrodes 21a and 22a can be captured by a camera, and the shape can be determined from the characteristics of the shapes.
- the portion of the upper surface (flat surface) of the crystal blank 2 where the suction nozzle 6 sucks is the end on the side where the extraction electrode 21a is located. Therefore, as shown in FIG. 5, when the suction surface of the suction nozzle 6 is flat, the force at which a part of the suction surface comes into contact with the extraction electrode 21a, and the remaining part faces the upper surface of the crystal blank 2 at an interval. Will do. However, since the thickness of the extraction electrode 21a is as thin as about 1000 A, it does not hinder the suction by the nozzle 6.
- the effect of confining vibration energy inside is obtained by forming one surface of the crystal blank 2 into a beveling arc shape or convex shape, and the other surface is Flatten any part of the surface, especially one end side corresponding to the longitudinal bump, so that the attitude of the crystal blank 2 with respect to the suction nozzle 6 when the suction nozzle 6 is sucked is always constant. I have.
- the suction nozzle 6 when mounting the crystal blank 2 in the package 3, the suction nozzle 6 is used to attach the end of the flat surface of the crystal blank 2 (corresponding to the position where the stud bump is formed).
- the crystal piece 2 sucked by the suction nozzle 6 is always positioned on a plane perpendicular to the axis of the suction nozzle 6, ie, a posture parallel to the bottom surface of the package 3. To be placed.
- the present invention by flattening one surface of the crystal blank, even if the end portion of the flat surface avoiding the portion where the excitation electrode exists is sucked by the suction nozzle, water
- the crystal piece can be held in a horizontal position, and the center excitation electrode is not damaged due to the suction by the nose, and the flat surface of the crystal piece is placed parallel to the package bottom, so that miniaturization is possible as much as possible.
- the ultrasonic wave is applied to the stud bump from the suction nozzle at that position.
- the operation of applying the target can be performed efficiently and stably.
- an oscillator can be formed by combining a crystal blank and an IC.
- connection electrodes 31 and 32 of the package 3 are not connected to the terminal electrodes 33 and 34 for external connection.
- the suction surface of the suction nozzle 16 is provided with a concave portion 16a which is a relief portion for preventing the suction nozzle 16 from coming into contact with the extraction electrode 21a extracted from the upper excitation electrode. I have.
- the suction nozzle 16 holds the crystal piece 2 without damaging the extraction electrode 21a because the tip surface of the suction nozzle 16 contacts the surface of the crystal piece but does not contact the extraction electrode 21a during suction. be able to.
- the plurality of stud bumps 4 are formed in advance on the surfaces of the connection electrodes 31 and 32, that is, on the package 3 side.
- the plurality of stud bumps 4 may be formed instead. It may be formed in advance on the surfaces of the extraction electrodes 21a and 22a, that is, on the quartz piece 2 side.
- the number of stud bumps to be formed may be one or more. For example, two pieces on one connection electrode 31 and two pieces on the other connection electrode 32 may be arranged at a certain interval in the longitudinal direction of the crystal blank 2.
- the AT plate of a crystal unit as a piezoelectric device has been described.
- the present invention can be applied to other piezoelectric devices such as a resonator and an oscillator. is there.
- the beveling shape of the crystal blank 2 is not limited to the arc shape, but may be a slope shape.
- an oscillator as described above, a crystal blank and an IC are combined. It is one that has, c omitted because the details are known techniques
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005511535A JPWO2005006548A1 (ja) | 2003-07-10 | 2004-07-09 | 圧電デバイスとその製造方法 |
US10/563,882 US20060175939A1 (en) | 2003-07-10 | 2004-07-09 | Piezoelectric device and method of producing the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-194684 | 2003-07-10 | ||
JP2003194684A JP2005033390A (ja) | 2003-07-10 | 2003-07-10 | 圧電デバイスとその製造方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005006548A1 true WO2005006548A1 (ja) | 2005-01-20 |
Family
ID=34055696
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/009810 WO2005006548A1 (ja) | 2003-07-10 | 2004-07-09 | 圧電デバイスとその製造方法 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20060175939A1 (ja) |
JP (2) | JP2005033390A (ja) |
CN (1) | CN1820414A (ja) |
WO (1) | WO2005006548A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011205516A (ja) * | 2010-03-26 | 2011-10-13 | Seiko Epson Corp | 圧電振動素子、及び圧電振動子 |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004180274A (ja) * | 2002-11-15 | 2004-06-24 | Nippon Dempa Kogyo Co Ltd | 水晶振動子 |
JP2010187333A (ja) * | 2009-02-13 | 2010-08-26 | Seiko Instruments Inc | 圧電振動子、圧電振動子の製造方法および発振器 |
US9035538B2 (en) * | 2011-11-02 | 2015-05-19 | Nihon Dempa Kogyo Co., Ltd. | Piezoelectric vibrating piece and piezoelectric device |
JP2013165404A (ja) * | 2012-02-10 | 2013-08-22 | Seiko Instruments Inc | 振動デバイス及び発振器 |
CN103346749A (zh) * | 2013-06-20 | 2013-10-09 | 电子科技大学 | 一种ltcc集成封装表面贴晶体振荡器 |
JP2015088579A (ja) * | 2013-10-30 | 2015-05-07 | セイコーエプソン株式会社 | パッケージ、光学デバイス、光センサー、電子デバイスおよび電子機器 |
JP6508326B2 (ja) * | 2015-03-12 | 2019-05-08 | 株式会社村田製作所 | 加速度検出装置及びその製造方法 |
JP6831260B2 (ja) * | 2017-02-17 | 2021-02-17 | 日本電波工業株式会社 | 圧電デバイス |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55153416A (en) * | 1979-05-17 | 1980-11-29 | Matsushima Kogyo Co Ltd | Piezoelectric crystal oscillator and its manufacture |
JPH08298423A (ja) * | 1995-04-25 | 1996-11-12 | Kinseki Ltd | 圧電振動子 |
JPH10284972A (ja) * | 1997-04-04 | 1998-10-23 | Toyo Commun Equip Co Ltd | 圧電振動子のパッケージ内支持構造 |
JP2001292048A (ja) * | 2000-04-05 | 2001-10-19 | Seiko Epson Corp | 圧電振動片のマウント構造とマウント方法及び圧電デバイス |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3659615A (en) * | 1970-06-08 | 1972-05-02 | Carl C Enger | Encapsulated non-permeable piezoelectric powered pacesetter |
FR2568443B1 (fr) * | 1984-07-27 | 1986-11-14 | Cepe | Boitier a fermeture a froid supportant les hautes temperatures |
EP0703613A3 (en) * | 1994-09-26 | 1996-06-05 | Motorola Inc | Protection of electronic components in acidic and basic environments |
JP3669463B2 (ja) * | 1997-08-05 | 2005-07-06 | Tdk株式会社 | 樹脂封止表面実装型電子部品 |
-
2003
- 2003-07-10 JP JP2003194684A patent/JP2005033390A/ja active Pending
-
2004
- 2004-07-09 WO PCT/JP2004/009810 patent/WO2005006548A1/ja active Application Filing
- 2004-07-09 US US10/563,882 patent/US20060175939A1/en not_active Abandoned
- 2004-07-09 CN CN200480019674.0A patent/CN1820414A/zh active Pending
- 2004-07-09 JP JP2005511535A patent/JPWO2005006548A1/ja active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55153416A (en) * | 1979-05-17 | 1980-11-29 | Matsushima Kogyo Co Ltd | Piezoelectric crystal oscillator and its manufacture |
JPH08298423A (ja) * | 1995-04-25 | 1996-11-12 | Kinseki Ltd | 圧電振動子 |
JPH10284972A (ja) * | 1997-04-04 | 1998-10-23 | Toyo Commun Equip Co Ltd | 圧電振動子のパッケージ内支持構造 |
JP2001292048A (ja) * | 2000-04-05 | 2001-10-19 | Seiko Epson Corp | 圧電振動片のマウント構造とマウント方法及び圧電デバイス |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011205516A (ja) * | 2010-03-26 | 2011-10-13 | Seiko Epson Corp | 圧電振動素子、及び圧電振動子 |
Also Published As
Publication number | Publication date |
---|---|
JP2005033390A (ja) | 2005-02-03 |
JPWO2005006548A1 (ja) | 2006-10-26 |
US20060175939A1 (en) | 2006-08-10 |
CN1820414A (zh) | 2006-08-16 |
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