JP5975936B2 - Antenna sheet and manufacturing method thereof - Google Patents

Description

  The present invention relates to an antenna sheet having an antenna coil and a manufacturing method thereof.

  An identification system that combines a transmission / reception device that transmits a specific frequency and an IC card having a resonance circuit that responds wirelessly to the transmission / reception device wirelessly, such as a commuter pass for transportation such as a railway, and a highway Have already been put to practical use in automatic fee collection systems, merchandise management systems in the distribution industry, etc.

  Further, a generally known IC card has been manufactured by a method of embedding an antenna wire and an IC chip in a PET resin film for an IC card. However, such an IC card has a problem that the thickness is large and the number of parts is large, resulting in an increase in cost.

  Therefore, today, a PET resin film in which an aluminum foil is laminated on the surface via an adhesive layer is prepared, and a part of the aluminum foil on the PET resin film is removed by etching, and a spiral shape is formed on the PET resin film. An antenna sheet provided with an antenna coil pattern and a pad (contact) is formed, and an IC chip, a capacitor or a conductive member (hereinafter collectively referred to as “IC chip etc.”) is mounted on the antenna sheet. An IC card having a simplified structure is also known and has already been put into practical use (for example, see Patent Document 1).

  In that case, in the IC chip or the like, one electrode terminal is electrically coupled to a pad connected to the outermost line pattern of the antenna coil, and the other electrode terminal is connected to the innermost line pattern of the antenna coil. It is electrically coupled to the pad.

JP-A-2005-45161.

  As described above, when an IC chip or the like is mounted on the antenna sheet, one electrode terminal of the IC chip or the like is electrically coupled to the pad connected to the outermost line pattern of the antenna coil, and the other electrode The terminal is electrically coupled to a pad provided on the innermost line pattern of the antenna coil. Therefore, when an IC chip or the like is disposed inside the spiral antenna coil, a part of the outermost line pattern of the antenna coil crosses over the antenna coil and is electrically connected to the antenna coil. Must be crossed in an electrically isolated state.

  Therefore, conventionally, an antenna is provided in a state in which an insulation layer is separately provided on a portion where the outermost line pattern intersects with the antenna coil, or an insulating sheet printed with a bridge connection wire pattern is attached and insulated from the antenna coil. A part of the line pattern on the outermost periphery of the coil is guided to the inside of the antenna coil.

  Therefore, the conventional antenna sheet has a problem that the manufacturing process is large and the number of parts is large, resulting in high cost.

  Therefore, there is a technical problem to be solved in order to provide an antenna sheet having a small number of parts and capable of reducing the cost, and a method for manufacturing the antenna sheet, and the present invention solves this problem. Objective.

The present invention has been proposed to achieve the above object, and the invention according to claim 1 is an antenna comprising an insulating sheet material and a spirally wound line pattern formed on the surface of the insulating sheet material. A coil, a first pad formed on the outermost line pattern of the antenna coil, formed on the surface of the antenna sheet, and formed on the surface of the insulating sheet material; a second pad provided on the circumferential line pattern, wherein formed on the surface of the insulating sheet material, and a third pad provided inside the antenna coil region, in the antenna sheet wherein the first The first pad and the sheet of the third pad are folded at the back side of the insulating sheet material by a cut formed so as to surround a part of the third pad. Are opposed polymerized via the insulating sheet material, said first pad and the third pad and the holes in the overlapping region is formed, and the first pad and the third pad is pressurized Provided is an antenna sheet that is coupled by fastening and is electrically coupled through the hole .

According to this configuration, a portion of the third pad cut is placed folded on the back side of the insulating sheet, and its third state in which a part was allowed to first pad and facing the polymerization of the pad, the insulation A hole is drilled in the sheet material, and between the part of the counter-polymerized third pad and the first pad, between the part of the counter-polymerized third pad and the first pad. It is fixed by caulking through the hole and electrically coupled. As a result, an antenna sheet in which the outermost line pattern of the antenna coil is guided inside the same antenna coil region as the innermost line pattern of the antenna coil can be easily obtained. Therefore, the manufacturing process of the antenna sheet can be simplified, the number of parts can be reduced, and the manufacturing cost of the antenna sheet can be reduced.

According to a second aspect of the present invention, in the configuration of the first aspect, one electrode terminal of an IC chip, a capacitor or a conductive member is connected to the second pad, and is connected to the third pad. The fourth pad provides an antenna sheet to which the other electrode terminal of the IC chip, capacitor or conductive member is connected.

  According to this configuration, inside the antenna coil region, the second pad provided in the innermost line pattern of the antenna coil and the third pad connected to the outermost line pattern of the antenna coil, respectively. When the electrode terminals of the IC chip, the capacitor or the conductive member are connected, a data carrier such as a non-contact IC card in which the IC chip, the capacitor or the conductive member is mounted on the antenna sheet can be easily formed.

The invention according to claim 3 is: (1) An unnecessary portion of the aluminum foil that is detachably attached to one surface of the insulating sheet material is removed, and the spirally wound antenna coil, and the outermost periphery of the antenna coil Forming a first pad provided in the line pattern, a second pad provided in the innermost line pattern of the antenna coil, and a third pad provided inside the antenna coil region; (2) a step of forming a cut in the insulating sheet material so as to surround a part of the third pad; and (3) a part of the third pad from the cut portion to the back surface of the insulating sheet material. And folding the folded third pad through the first pad and the insulating sheet material, and (4) the first pad of the insulating sheet material and the third pad. The area where the pad overlaps Forming a hole in, and a (5) treating electrically conductive through the hole causes the said made to face polymerized first pad and the third pad coupled by caulking, Provided is a method for manufacturing an antenna sheet.

According to this manufacturing method, for example, after printing an antenna coil, each of the first, second, and third pads on an insulating sheet material that is rolled up in a roll with aluminum foil attached to one surface Etching is performed to form the antenna coil and the first, second, and third pads. After that, a cut is made, and a part of the third pad is folded to the back side from the cut. The first pad is oppositely polymerized, a part of the third pad is folded to the back side of the insulating sheet material, a hole is formed in the insulating sheet material, and the third part of the oppositely polymerized third pad and the first pad The antenna sheet can be easily manufactured by a series of operations such as conducting conduction between the first and third pads that are oppositely polymerized by simply crimping and fixing between the pads and the other pads through holes. can do.

  According to the invention, since the number of parts of the antenna sheet can be reduced and the manufacturing process can be simplified, an effect of reducing the manufacturing cost of the antenna sheet and providing it at low cost is expected.

The top view of the antenna sheet by the embodiment of the present invention. The AA line expanded sectional view of the antenna sheet | seat shown in FIG. The top view which shows the state in the middle of manufacture of the antenna sheet | seat shown in FIG. The flowchart explaining the manufacturing process of the antenna sheet by this embodiment.

In order to achieve the object of providing an antenna sheet having a reduced number of parts and a cost reduction method and a method for manufacturing the antenna sheet, an insulating sheet material and a spiral formed on the surface of the insulating sheet material are provided. An antenna coil formed of a line pattern that circulates in a shape, a first pad formed on the outermost line pattern of the antenna coil, formed on the surface of the insulating sheet material, and the surface of the insulating sheet material A second pad formed on the innermost line pattern of the antenna coil, a third pad formed on the surface of the insulating sheet material and provided inside the antenna coil region, in the antenna sheet wherein the third pad, a notch is formed so as to surround a portion of the third pad, one end of the insulating sheet material Folded on the side being opposite polymerized through the sheet material and the first pad, the insulating sheet material, holes are formed in a region between the first pad and the third pad overlap, The first pad and the third pad are realized by being coupled by caulking and being electrically coupled through the hole .

  Hereinafter, an example of an antenna sheet according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a plan view of an antenna sheet according to an embodiment of the present invention, and FIG. 2 is an AA line enlarged cross-sectional view of the antenna sheet shown in FIG. FIG. 3 is a plan view showing a state in the middle of manufacturing the antenna sheet. 1 to 3, the antenna sheet 10 includes an insulating sheet material 11, an antenna coil 12 formed on the insulating sheet material 11, a first pad 13, a second pad 14, a third pad 15, It consists of the fourth pad 16 and the like.

  The insulating sheet material 11 is made of a synthetic resin such as a PET resin film. On the other hand, the antenna coil 12, the first pad 13, the second pad 14, the third pad 15, and the fourth pad 16 are each formed of the same material, such as gold, silver, copper, and aluminum. It is made of metal with good conductivity.

  The antenna coil 12 is spirally formed on one surface of the insulating sheet material 11 by printing or the like. As shown in FIGS. 1 and 2, the first pad 13 that protrudes toward the center of the antenna coil 12 is formed on a part of the outermost line pattern 12 a of the antenna coil 12. It is formed integrally with the pattern 12a. In addition, in the location where the 1st pad 13 protruded, in order to avoid a contact with the 1st pad 13, a part of each wire | line is bent in the U shape toward the center side of the antenna coil 12. As shown in FIG. 1, the outer peripheral shape of the antenna coil 12 is formed in a substantially rectangular shape in plan view.

  On the other hand, one end side of the innermost line pattern 12b of the antenna coil 12 is routed to a position opposite to the first pad 13 as shown in FIG. 14 is integrally provided so as to face the first pad 13 substantially.

  As shown in FIG. 1, an auxiliary line pattern 19 is formed along the innermost line pattern 12b in the inner region 18 surrounded by the antenna coil 12. One end side of the auxiliary line pattern 19 extends to a position corresponding to the first pad 13, and the other end side extends to a position adjacent to one end portion of the innermost line pattern 12b. Then, the third pad 15 is integrally provided on one end side of the auxiliary line pattern 19, and the fourth pad 16 is integrally provided on the other end side in parallel with the second pad 14.

  As shown in FIG. 3, in the course of manufacturing the antenna sheet 10, a U-shape in which the insulating sheet material 11 surrounds a part of the third pad 15 and the side facing the first pad 13 is opened. The notch 20 is provided. And in the part of the notch | incision 20, the 3rd pad 15 is folded by the direction shown by the arrow 24 in FIG. 2 with the insulating sheet material 11, ie, the back surface side of the insulating sheet material 11, and the insulating sheet 11 used as a receiving side. It is arranged in a state of close contact with the back surface of the plate. Further, in the folded state, the tip portion of the third pad 15 is disposed at a position facing the first pad 13, that is, facing and superposed on the first pad 13. However, in the state of being simply folded to the back side, the first pad 13 and the third pad 15 are opposed to each other via the insulating sheet material 11 and thus are not electrically joined.

  Therefore, in this antenna sheet 10, for example, a plurality of heated needles are directed from one surface side to the other surface side in a part of the portion 21 where the first pad 13 and the third pad 15 are opposed to each other. A plurality of holes are formed in the insulating sheet material 11 by pressing, and through the plurality of holes, a part of the first pad 13 and a part of the third pad 15 are electrically connected, and at the same time, caulking is fixed. Thereby, the first pad 13, the third pad 15, the auxiliary line pattern 19, and the fourth pad 16 are made conductive. Note that the conduction process between the first pad 13 and the third pad 15 is not limited to this.

  Therefore, the antenna sheet 10 configured in this way can be formed from a single sheet material having an aluminum foil or the like adhered on one surface, thereby reducing the number of parts and simplifying the manufacturing process. can do. Thereby, it becomes possible to reduce the manufacturing cost of the antenna sheet 10 and to provide it at low cost.

  The antenna sheet 10 thus formed is provided with one electrode terminal (not shown) provided on the IC chip, capacitor, or conductive member, that is, the IC chip 22 or the like, in the antenna coil region 18. If the second electrode terminal 14 is connected and fixed, and the other electrode terminal is mounted and fixed to the fourth pad 16 that is also provided in the antenna region 18, the data carrier can be easily configured. Will be able to.

  FIG. 4 is a flowchart showing an example of the manufacturing process of the antenna sheet. An example of the manufacturing method will be described in the order of step (a) to step (g) according to the flowchart of FIG.

  Step (a): In manufacturing the antenna sheet 10 of this embodiment, first, in step S1, a flexible sheet in which a conductive metal foil is formed on one surface of the insulating sheet material 11 and the insulating sheet material 11 is prepared. In the flexible sheet of this embodiment, the insulating sheet material 11 has a thickness of about 38 microns. Then, an adhesive layer having a thickness of about 2 microns is applied to the surface of the insulating sheet material 11, and an aluminum foil having a thickness of about 20 microns is further adhered thereon. However, the flexible sheet is not necessarily limited to this. Also, the insulating sheet material 11 and the aluminum foil may be bonded by melting the resin without providing an adhesive layer and directly bonding the aluminum foil to the film surface extruded by the extruder. In any case, a continuous flexible sheet in which an aluminum foil is bonded to the surface of the insulating sheet material 11 is prepared here.

  Step (b): Subsequently, in Step S2, the antenna coil 12 shown in FIG. 3 and the first pad 13, respectively, are formed on the surface of the aluminum foil using acid resistant or alkaline resistant ink having etching resistance. The second pad 14, the third pad 15, and the fourth pad 16 are printed by a gravure method or the like.

  Step (c): Next, an etching process is performed in Step S3 to remove the aluminum foil portion other than the printed pattern, and the antenna coil 12, the first pad 13, and the second pad are formed on one surface of the insulating sheet material 11. The pad 14, the third pad 15, and the fourth pad 16 are formed.

  Step (d): Next, as shown in FIG. 3, a cut 20 provided so as to surround a part of the third pad 15 is formed in the insulating sheet material 11.

  Step (e): Next, as shown in FIG. 1, a part of the insulating sheet material 11 surrounded by the notch 20 and a part of the third pad 15 are folded together on the back side of the insulating sheet material 11, The folded third pad 15 is oppositely polymerized with the first pad 13 through the insulating sheet material 11. A part of the folded insulating sheet material 11 may be adhered and fixed to the receiving insulating sheet material 11.

  Step (f): Subsequently, the portions 21 of the first pad 13 and the third pad 15 that are oppositely superposed are caulked and fixed to each other, and the conduction process between the first pad 13 and the third pad 15 is performed. I do. Thereby, the antenna sheet 10 is completed.

  Step (g): Further, an IC chip 22 or the like is mounted on the insulating sheet material 11, and then the insulating sheet material 11 is cut and separated individually at the portion of the planned cutting line 23 shown in FIG. A career is made. Moreover, a protective film etc. are affixed on the front and back of this data carrier as needed.

  It should be noted that the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones. For example, although the insulating sheet material 11 of the present embodiment uses a PET resin film, paper or the like can be used instead of the PET resin film.

  The present invention can be applied to a general electronic circuit board in addition to a data carrier in a non-contact IC card or the like.

10 antenna sheet 11 insulating sheet material 12 antenna coil 12a outermost line pattern 12b innermost line pattern 13 first pad 14 second pad 15 third pad 16 fourth pad 17 bent in a U-shape Part 18 Antenna coil inner area 19 Auxiliary line pattern 20 Notch 21 Conducted part 22 IC chip etc. 23 Planned cutting line 24 Folding direction

Claims (3)

Insulating sheet material, an antenna coil comprising a spirally wound line pattern formed on the surface of the insulating sheet material, and provided on the outermost line pattern of the antenna coil formed on the surface of the insulating sheet material Formed on the surface of the insulating sheet material, a second pad provided on the innermost line pattern of the antenna coil, and formed on the surface of the insulating sheet material, In an antenna sheet provided with a third pad provided inside the antenna coil region ,
The third pad has a notch formed so as to surround a part of the third pad, so that one end side is folded to the back side of the insulating sheet material, and the first pad and the sheet material are interposed therebetween. Oppositely polymerized ,
In the insulating sheet material, a hole is formed in a region where the first pad and the third pad overlap,
The antenna sheet, wherein the first pad and the third pad are coupled by caulking and are electrically coupled through the hole . One electrode terminal of the IC chip, capacitor or conductive member is connected to the second pad, and the IC chip, capacitor or conductive member is connected to the fourth pad connected to the third pad. claim 1 Symbol placement of the antenna sheet other electrode terminals is characterized in that it is connected. An antenna sheet manufacturing method comprising the following steps.
(1) An unnecessary portion of the aluminum foil that is releasably attached on one surface of the insulating sheet material is removed, and a spiral antenna coil and a first line pattern provided on the outermost line pattern of the antenna coil are provided. Forming a pad, a second pad provided in the innermost line pattern of the antenna coil, and a third pad provided inside the antenna coil region;
(2) forming a cut in the insulating sheet material so as to surround a part of the third pad;
(3) A part of the third pad is folded from the cut portion to the back side of the insulating sheet material, and the folded third pad is counter-polymerized via the first pad and the insulating sheet material. The process of
(4) forming a hole in a region where the first pad and the third pad of the insulating sheet material overlap;
(5) A step of electrically coupling the first pad and the third pad, which are oppositely polymerized, by caulking and fixing, and through the hole .

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