KR101021511B1 - Laminated Sheet Integrated with Antenna Coil Including RF Chip Module and A Method for Manufacturing the Same - Google Patents

Abstract

The present invention relates to an antenna coil laminated sheet including an RF chip module and a method of manufacturing the same.

In the present invention, using the two sheets of the same thickness, which is 1/2 of the thickness of the chip module in order to position the antenna coil in the center of the cross section of the laminated sheet using a sheet of the antenna coil interposed between the laminated sheet is produced, and the thermocompression process In order to prevent the deformation in the internal hole, the thermosetting resin is filled and used in the space of the inner hole to prevent the deformation of the sheet in which the RF chip module is laminated. In addition, by forming a terminal joining hole in the sheet in which the antenna coil is embedded, and processing the terminal joining hole to pass through the U-shape, and then bonded to the terminal of the RF chip module through the terminal joining hole physical durability of the RF card Can greatly improve.

Antenna, coil, RF chip, module

Description

Laminated Sheet Integrated with Antenna Coil Including RF Chip Module and A Method for Manufacturing the Same}

The present invention relates to an antenna coil laminated sheet including an RF chip module capable of improving the durability of a card by improving the configuration of the antenna coil laminated sheet and a method of connecting the coil and the terminal, and a method of manufacturing the same.

In general, the configuration of an antenna coil laminated sheet including an RF chip module is composed of four sheets (two transparent sheets and two white sheets having different thicknesses), and the position where the coil is embedded is one side of the sheet when laminated. Tend to be biased. That is, the conventional technology uses an adhesive or the like to secure the RF chip module to the sheet, and in consideration of the deformation in the thermocompression process, the thickness of the lead frame and the dam portion is set to the thickness of the sheet to the antenna coil laminated sheet Prepared. As shown in FIG. 1, an antenna coil embedded between the first sheet and the second sheet is formed by stacking the first sheet (250 μm) equal to the dam thickness of the RF chip and the second sheet (150 μm) equal to the terminal thickness. The layer is biased to one side on the sheet cross section. For this reason, the pre-laminated inlay sheet tends to be poor in warpage and durability.

On the other hand, the Republic of Korea Patent No. 0373063 "wire conductor connection method and apparatus" has adopted a structure in which the wire conductor passes through the terminal region or the region accommodating the terminal region in a straight line, but the wire conductor is straight through the terminal portion. In this case, the outer end surface of the RF card terminal and the contact portion of the antenna coil may be easily shorted by physical bending. In addition, in Korean Patent No. 0555639, a conductive tape is attached to a portion where both ends of the antenna coil are heat-sealed to prevent the flow of current due to short circuit between the board and the antenna coil by bending the RF card. However, it is disadvantageous in that the manufacturing and attaching process of the conductive tape has to be added.

The present invention is an antenna coil laminated sheet including an RF chip module for manufacturing an RF card, the antenna coil is positioned in the center on the cross-sectional structure of the laminated sheet and through the structural improvement of the junction portion of the antenna coil and the RF chip terminal An object of the present invention is to provide an antenna coil laminated sheet including a RF chip module and a method of manufacturing the same, which can improve physical durability of an RF card.

The present invention relates to an antenna coil laminated sheet including an RF chip module, a method of manufacturing the same, and an RF card manufactured from the antenna coil laminated sheet including the RF chip module. In the present invention, the RF chip module is loaded on the lead frame forming the terminal portion in the form of a chip on board (COB), and a dam formed of an epoxy resin wraps the RF chip on the lead frame to protect the RF chip. It is a structure that is formed. Therefore, the outer shape consists of the lower terminal portion and the upper dam portion, and the upper dam portion is usually narrower than the width of the lower terminal portion. The antenna coil laminate sheet according to the present invention includes at least one RF chip module and an antenna coil surrounding the terminal coil. A plurality of RF cards are manufactured through a process of thermocompression bonding, punching, and the like from the antenna coil laminate sheet according to the present invention.

In the antenna coil laminate sheet including the RF chip module according to the present invention, the first hole for inserting the dam portion of the RF chip module and the second and third holes for joining the terminal portion of the RF chip module formed on both sides of the first hole are perforated. First plastic sheet;

The one end and the other end surround the first hole, the second hole, and the third hole, respectively, and pass through the second hole and the third hole, respectively, and the passing portion is U-shaped open to the opposite side of the first hole. An antenna coil layer embedded on one surface of the first plastic sheet;

An RF chip module having a terminal portion joined to the antenna coil through the second and third holes for joining the terminal portion and a dam portion inserted into the first hole;

A second plastic sheet laminated on a surface on which an antenna coil layer of the first plastic sheet is formed so that a fourth hole having an RF chip terminal portion shape is drilled and the RF chip module is opened; And

A first protective layer sheet and a second protective layer sheet laminated on outer surfaces of the laminated first plastic sheet and the second plastic sheet, respectively;

It is made, including.

In addition, the present invention provides a method for manufacturing an antenna coil laminated sheet including an RF chip module, including the following manufacturing steps.

a) on one surface of the first plastic sheet in which the first hole for inserting the dam portion of the RF chip module, the second hole and the third hole for joining the terminal portion of the RF chip module formed on both sides of the first hole,

Embed the antenna coil so as to surround the first hole, the second hole, and the third hole, and one end and the other end of the second hole and the third hole for joining the terminal part, respectively, but the part passing through the second hole is opposite to the first hole. Manufacturing an antenna embedding sheet to be opened in a U-shape;

b) matching the antenna embedding sheet using the first hole to a tool in which an RF chip module is arranged, and the terminal part of the antenna coil and the RF chip module through the second hole and the third hole for joining the terminal part. Splicing;

c) stacking a second plastic sheet having a perforated fourth hole in the shape of an RF chip terminal portion on an embedded surface of the antenna coil layer of the first plastic sheet to open the RF chip module; And

d) laminating a first protective layer sheet and a second protective layer sheet on outer surfaces of the laminated first plastic sheet and the second plastic sheet, respectively.

In the present invention, a laminated sheet having an antenna coil layer interposed therebetween was prepared using two sheets of the same thickness, one half of the thickness of the RF chip module, in order to position the antenna coil at the center of the cross section of the laminated sheet. In order to prevent deformation in the pressing process, the thermosetting resin was filled and used in the space of the inner hole to prevent deformation of the RF chip module subsheet.

In addition, as shown in FIG. 3, the junction part of the conventional antenna coil and the RF chip module terminal part is configured such that the antenna coil passes through the RF chip module terminal part in a straight line so that the RF card is subjected to deformation such as physical bending. There is a problem that the coil passing through the outer surface of the chip module terminal portion can be easily shorted by friction with the front end portion of the outer surface of the terminal portion. A hole for forming the terminal portion is formed in the sheet into which the antenna coil is embedded, and the terminal portion bonding hole is U. After passing through the shape (b) and then bonded to the terminal portion of the RF chip module through the terminal portion joining hole to eliminate the friction between the front end portion of the terminal portion and the antenna coil was able to greatly improve the physical durability.

In the antenna coil laminated sheet including the RF chip module according to the present invention and a method of manufacturing the same, the ratio (A: B) of the first plastic sheet thickness A and the second plastic sheet thickness B is 1: 1.0 to 1.3. If it is preferable to be out of the above range and the antenna coil is off the center portion, physical durability may be weak. The sum of the first plastic sheet thickness A and the second plastic sheet thickness B preferably matches the thickness of the RF chip module.

The antenna coil may be a copper coil coated with an insulating material such as enamel. In addition, the resin filled in the second hole and the third hole for joining the terminal portion, and the fourth hole of the RF chip module shape may be a thermosetting epoxy resin.

The first plastic sheet and the second plastic sheet, the first protective layer sheet and the second protective layer sheet are independently a polyvinylchloride (PVC) sheet, a polycarbonate (PC) sheet, a glycol modified polyethylene terephthalate (PETG) sheet, or a PVC ( Sheets made of polyvinylchloride (Acrylonitrile Butadiene Styrene) resin, polycarbonate (PC) and glycol modified polyethylene terephthalate (PETG) resins or polyester-based synthetic paper may be used. The polyester-based synthetic paper is made of a plastic sheet in the form of a paper and is specially processed by imparting opacity, handwriting, and printability. In addition, it is preferable that the first plastic sheet and the second plastic sheet, the first protective layer sheet, and the second protective layer sheet are made of a plastic sheet of the same material in terms of integration in the thermocompression bonding process. Can be used.

In the antenna coil laminate sheet including the RF chip module according to the present invention, the RF coil manufactured by placing the antenna coil in the center of the laminate sheet and treating the junction of the RF chip module terminal portion and the coil in a U shape has high physical durability. There is an advantage.

Hereinafter, a manufacturing process of an antenna coil laminate sheet including an RF chip module according to the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are provided as examples to ensure that the spirit of the invention to those skilled in the art will fully convey. Accordingly, the present invention is not limited to the embodiments described below and may be embodied in other forms. In the drawings, lengths, thicknesses, and the like of layers and regions may be exaggerated for convenience. Like numbers refer to like elements throughout.

Figure 2 is a cross-sectional view (a) and a cross-sectional photograph (b) of the configuration of the antenna coil laminated sheet manufactured according to the present invention. It can be seen that an antenna coil is embedded between two plastic sheets having the same thickness (180 μm).

Hereinafter, a manufacturing process of the antenna coil laminate sheet according to the present invention will be described.

Currently, the thickness of the RF chip module for the card produced by the electronic component manufacturer is in the range of 340㎛ ~ 360㎛. In the present invention, the thickness of the first plastic sheet 100 and the second plastic sheet 150 is processed to 180㎛ to correspond to the case where the thickness of the RF chip module 50 is 360㎛, the first plastic sheet and the first As the material of the 2 plastic sheet, the 1st protective layer sheet, and the 2nd protective layer sheet, hard PVC (Polyvinylchloride) was used.

First, as shown in FIG. 4, a first hole 10 for inserting a dam portion of the RF chip module into the first plastic sheet 100 and a second terminal bonding portion of the RF chip module on both sides of the first hole are shown in FIG. 4. The hole 20 and the third hole 30 are punched out, and as shown in FIG. 5, the fourth hole 40 in the shape of the RF chip module terminal part is punched in the second plastic sheet 150.

Next, in the second step, the first hole 10 for inserting the dam part of the RF chip module and the second hole 20 and the third hole 30 for joining the terminal part of the RF chip module formed on both sides of the first hole are drilled. Embedding the antenna coil 200 on one surface of the first plastic sheet 100, specifically, as shown in Figure 6 the antenna coil is the first hole 10, the second hole 20 and the third One end and the other end surround the hole 30 and pass through the second hole and the third hole for joining the terminal part, respectively, wherein the passing parts 220 and 230 are U-shaped open to the opposite side of the first hole. Be sure to

According to the characteristics of the RF chip module, the antenna coil thickness (80㎛ ~ 150㎛), the distance between coils, the embedding area, the number of turns, etc. are set so that the resonance frequency of the antenna is located in the range of 15MHz to 19MHz. After input, the sheet is embedded with an enamel coated copper coil. As the embedding method, a conventional method such as an ultrasonic method may be used, and an embedded depth of about 1/3 of the coil cross section may be advantageous in that the coil is positioned at the center of the completed laminated sheet after the thermocompression bonding process.

Conventionally, the terminals are connected via a straight line on a plastic sheet in which one hole in the shape of an RF chip module is formed without separately forming a terminal joining hole, in which case the RF chip is applied when a physical force such as bending is applied to the card. The coil breaks due to friction with the tip of the outer surface of the module terminal. In the present invention, using a plastic sheet having a hole formed in the terminal portion, and when embedding the antenna coil to pass through the hole-formed portion in a U-shape, and then joining the terminal portion and the coil through the hole of the antenna coil by physical force Short circuit can be prevented.

Next, in the third step, the antenna embedding sheet shown in FIG. 6 is matched to the tool in which the RF chip module is arranged using the first hole 10 for inserting the dam of the RF chip module. By bonding the antenna coil and the terminal portion of the RF chip module through the second hole 20 and the third hole 30, as shown in FIG. 7, a passive sheet to which the RF chip module is bonded is formed.

Referring to the third step of the manufacturing process in more detail, the tool in which the RF chip module is arranged is configured to place the chip module by forming a groove about 100㎛ in the position of the chip module on the aluminum plate. The RF chip module 50 is placed in the groove of the tool in which the RF chip module is arranged so that the RF chip module dam part 60 faces upward and the RF chip module terminal part is positioned downward. Then, the antenna coil embedded sheet is turned over so that the surface on which the antenna coil is embedded is superimposed on the aluminum plate on which the RF chip module is arranged, so that the RF chip module dam portion is inserted into the first hole 10 for inserting the dam portion. After flipping over, the RF chip module terminal part 70 and the second hole and the third hole are formed through the second hole 20 and the third hole 30 by a thermo-compression bonding (TC bonding machine). The antenna coils 220 and 230 are joined to each other.

After the third step, as shown in FIG. 8, the thermosetting epoxy resin is filled into the second hole 20 and the third hole 30 (320, 330).

The fourth step, which is a next step, is to laminate the second plastic sheet manufactured in the first step on the antenna coil embedding surface of the plastic sheet bonded with the RF chip module shown in FIG. 8. As shown in FIG. 9, the plastic sheet bonded with the RF chip module illustrated in FIG. 8 is turned upside down so that the RF chip module terminal portion and the embedded antenna coil layer face upward, and then the fourth hole 40 in the shape of the RF chip module terminal portion. ) Laminated the second plastic sheet 150 perforated to open the RF chip module.

After the fourth step, as shown in FIG. 10, a thermosetting epoxy resin is filled in the RF chip module terminal part inside the fourth hole 40 having the RF chip shape to fill the internal space. Thermosets prevent sheet deformation due to gaps between plastic sheets and RF chip modules.

In the fifth step, which is a next step, as shown in FIG. 11, the first protective layer sheet 410 and the second protective layer sheet are respectively formed on the outer surfaces of the first plastic sheet 100 and the second plastic sheet 150. A step of completing the laminated sheet according to the present invention by laminating 420.

The first protective layer sheet 410 and the second protective layer sheet 420 may be formed by stacking 50 μm transparent PVC films on outer surfaces of the first plastic sheet 100 and the second plastic sheet 150, respectively. It can be made by a method of laminating (pre-lamination) or by directly laminating the printed sheet by thermocompression processing.

1 is a cross-sectional view (a) and a cross-sectional photograph (b) of the structure of a general antenna coil laminated sheet.

Figure 2 is a cross-sectional view (a) and a cross-sectional photograph (b) of the configuration of the antenna coil laminated sheet manufactured according to the present invention.

FIG. 3 shows a comparison between a conventional connection form (a) between a conventional antenna coil and a lead frame terminal and a connection form (b) between an antenna coil and a lead frame terminal unit according to the present invention.

4 is a front view of a first plastic sheet in which a first hole for inserting a dam portion of an RF chip, a second hole for joining a terminal portion of an RF chip, and a third hole are formed on both sides of the first hole according to the present invention.

FIG. 5 is a front view of a second plastic sheet having a perforated fourth hole in the shape of an RF chip module terminal portion according to the present invention; FIG.

6 is a front view of an antenna embedding sheet in which an antenna coil is embedded on one surface of the first plastic sheet according to the present invention.

7 is a cross-sectional view of a state in which an RF chip terminal unit and an antenna coil are bonded using a second hole and a third hole for terminal part bonding according to the present invention.

8 is a cross-sectional view of a state in which a second hole and a third hole for joining the terminal part are filled with a resin for filling after the RF chip terminal part and the antenna coil are bonded according to the present invention.

9 is a second plastic sheet in which the RF chip terminal portion and the antenna coil are bonded and the second hole and the third hole for the terminal portion bonding are filled with a filling resin, and then the fourth hole in the shape of the RF chip module terminal portion is punched. It is sectional drawing of state matching with.

10 is a cross-sectional view of a state filled with a thermosetting resin for preventing deformation in the configuration of the laminated sheet on the back surface of the RF chip module terminal portion located in the fourth hole according to the present invention.

11 is a cross-sectional view of a first protective layer sheet and a second protective layer sheet formed on the outer surface of the first plastic sheet and the outer surface of the second plastic sheet according to the present invention, respectively.

* Description of the symbols for the main parts of the drawings *

10: first hole for dam insertion of RF chip module

20: Second hole for joining the terminal portion of the RF chip module

30: Third hole for joining the terminal of the RF chip module

40: fourth hole in the shape of the RF chip module terminal portion

50: RF chip module

60: dam part of the RF chip module

70: terminal section of the RF chip module

100: a first plastic sheet in which the first hole, the second hole and the third hole are perforated

150: second plastic sheet in which the fourth hole is perforated

200: antenna coil

220: part via the second hole of the antenna coil

230: a part via the third hole of the antenna coil

320: thermosetting resin filled in the second hole

330: thermosetting resin filled in the third hole

340: thermosetting resin filled in the fourth hole

410: first protective layer sheet

420: second protective layer sheet

Claims (8)

delete A first plastic sheet having a first hole for inserting a dam portion of the RF chip module, a second hole and a third hole for joining the terminal portion of the RF chip module formed on both sides of the first hole; The one end and the other end surround the first hole, the second hole, and the third hole, respectively, and pass through the second hole and the third hole, respectively, and the passing portion is U-shaped open to the opposite side of the first hole. An antenna coil layer embedded on one surface of the first plastic sheet; An RF chip module having a terminal portion joined to the antenna coil through the second and third holes for joining the terminal portion and a dam portion inserted into the first hole; A second plastic sheet laminated on a surface on which an antenna coil layer of the first plastic sheet is formed so that a fourth hole having an RF chip terminal portion shape is drilled and the RF chip module is opened; And And a first protective layer sheet and a second protective layer sheet respectively laminated on outer surfaces of the laminated first plastic sheet and the second plastic sheet. The ratio (A: B) of the first plastic sheet thickness (A) and the second plastic sheet thickness (B) is 1: 1.0 to 1.3, the antenna coil laminated sheet comprising an RF chip module. 3. The method of claim 2, And an RF chip module filled with a thermosetting resin in the second hole and the third hole for joining the terminal part, and the fourth hole in the shape of the RF chip terminal part. A first plastic sheet having a first hole for inserting a dam portion of the RF chip module, a second hole and a third hole for joining the terminal portion of the RF chip module formed on both sides of the first hole; The one end and the other end surround the first hole, the second hole, and the third hole, respectively, and pass through the second hole and the third hole, respectively, and the passing portion is U-shaped open to the opposite side of the first hole. An antenna coil layer embedded on one surface of the first plastic sheet; An RF chip module having a terminal portion joined to the antenna coil through the second and third holes for joining the terminal portion and a dam portion inserted into the first hole; A second plastic sheet laminated on a surface on which an antenna coil layer of the first plastic sheet is formed so that a fourth hole having an RF chip terminal portion shape is drilled and the RF chip module is opened; And And a first protective layer sheet and a second protective layer sheet respectively laminated on outer surfaces of the laminated first plastic sheet and the second plastic sheet. The first plastic sheet and the second plastic sheet, the first protective layer sheet and the second protective layer sheet are independently a polyvinylchloride (PVC) sheet, a polycarbonate (PC) sheet, a glycol modified polyethylene terephthalate (PTG) sheet, and a polyvinylchloride (PVC) sheet. RF chip module, characterized in that it is selected from the group consisting of a sheet of a mixture of acrylonitrile butadiene styrene (ABS) resin, polycarbonate (PC) and glycol modified polyethylene terephthalate (PETG) resin and a polyester-based synthetic paper Antenna coil laminated sheet comprising a. delete a) on one surface of the first plastic sheet in which the first hole for inserting the dam portion of the RF chip module, the second hole and the third hole for joining the terminal portion of the RF chip module formed on both sides of the first hole, Embed the antenna coil so as to surround the first hole, the second hole, and the third hole, and one end and the other end of the second hole and the third hole for joining the terminal part, respectively, but the part passing through the second hole is opposite to the first hole. Manufacturing an antenna embedding sheet to be opened in a U-shape; b) matching the antenna embedding sheet using the first hole to a tool in which an RF chip module is arranged, and the terminal part of the antenna coil and the RF chip module through the second hole and the third hole for joining the terminal part. Splicing; c) stacking a second plastic sheet having a perforated fourth hole in the shape of an RF chip terminal portion on an embedded surface of the antenna coil layer of the first plastic sheet to open the RF chip module; And d) laminating a first protective layer sheet and a second protective layer sheet on outer surfaces of the laminated first plastic sheet and the second plastic sheet, respectively; And b) filling the second hole and the third hole for joining the terminal part with a thermosetting resin after the step b). a) on one surface of the first plastic sheet in which the first hole for inserting the dam portion of the RF chip module, the second hole and the third hole for joining the terminal portion of the RF chip module formed on both sides of the first hole, Embed the antenna coil so as to surround the first hole, the second hole, and the third hole, and one end and the other end of the second hole and the third hole for joining the terminal part, respectively, but the part passing through the second hole is opposite to the first hole. Manufacturing an antenna embedding sheet to be opened in a U-shape; b) matching the antenna embedding sheet using the first hole to a tool in which an RF chip module is arranged, and the terminal part of the antenna coil and the RF chip module through the second hole and the third hole for joining the terminal part. Splicing; c) stacking a second plastic sheet having a perforated fourth hole in the shape of an RF chip terminal portion on an embedded surface of the antenna coil layer of the first plastic sheet to open the RF chip module; And d) laminating a first protective layer sheet and a second protective layer sheet on outer surfaces of the laminated first plastic sheet and the second plastic sheet, respectively; And c) filling the inside of the fourth hole in the shape of the RF chip terminal part with a thermosetting resin after the step c). An RF card made from an antenna coil laminated sheet comprising an RF chip module according to any one of claims 2 to 4.

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