JP3505649B2 - Electrical connection member and method of manufacturing the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to, for example, LGA (La
The present invention relates to a structure of an electrical connection member suitable for mounting an IC package such as an nd grid array) on a substrate and the like, and a manufacturing method thereof.

[0002]

2. Description of the Related Art As semiconductor chips have become higher in density and wiring patterns on substrates have become finer, narrower pitches, more cores, and smaller sizes have been advancing in connecting chips to substrates. For example, in the case of a conventional connector that is manufactured by combining pressing and molding in which a contact is formed by pressing and a housing that accommodates the contact is formed by molding, for example, in order to increase the number of contacts required for connection. Along with this, in order to obtain a sufficient contact load at the large number of contacts, a complicated structure is required and high precision is required.

[0003]

As described above, since a complicated and highly accurate structure is required in accordance with the narrowing of pitch, the increase in the number of cores, and the downsizing, the conventional method using the press working or the mold working is required. With connectors, their manufacture is not easy,
There is a problem that it becomes extremely expensive. In view of the above problems, an object of the present invention is to provide an electrical connection member that can easily cope with narrow pitches, multi-cores, and miniaturization, and can be manufactured easily and inexpensively. To provide.

[0004]

According to the invention of claim 1, the electric connecting member is a double-sided pressure-sensitive adhesive sheet in which a pressure-sensitive adhesive is arranged on both sides of an insulating sheet, and is sewn into the double-sided pressure-sensitive adhesive sheet. are arranged and held, Ri Na more end surfaces, each conductive fibers forming the through-electrodes are located on the front and back surfaces of the double-sided pressure-sensitive adhesive sheet, the conductive fibers are conductive material cotton yarn
It is deposited by a shall. According to the invention of claim 2, the electric connection member is a double-sided pressure-sensitive adhesive sheet in which pressure-sensitive adhesives are arranged on both sides of an insulating sheet, and the double-sided pressure-sensitive adhesive sheet is sewn into the double-sided pressure-sensitive adhesive sheet and held in an array. Conductive fibers that are located on the front and back surfaces of the pressure-sensitive adhesive sheet and that constitute the through electrodes, and metal thin films that are adhered and arranged on the front and back surfaces of the double-sided pressure-sensitive adhesive sheet so as to cover both end surfaces of each conductive fiber. When Ri more name, conductive fibers electrically conductive cotton yarn
Materials are shall such be attached.

According to the third aspect of the present invention, the yarn is electrically conductive.
A conductive substance to form conductive fibers, and the conductive fibers are sewn into a double-sided pressure-sensitive adhesive sheet having an adhesive on both sides of an insulating sheet, and the conductive fibers sewn in The electric connection member is manufactured by cutting and removing the portion protruding above the double-sided pressure-sensitive adhesive sheet to form the through electrode by the conductive fibers which remain in the double-sided pressure-sensitive adhesive sheet and are arranged and held. According to the invention of claim 4,
Forming conductive fibers by attaching a conductive substance to the cotton wool
Then, the conductive fiber is sewn into the double-sided pressure-sensitive adhesive sheet in which the pressure-sensitive adhesive is arranged on both sides of the insulating sheet, and the part of the sewn-in conductive fiber that protrudes on the double-sided pressure-sensitive adhesive sheet is cut off and removed. Thus, the through electrodes are formed by the conductive fibers that are retained and arrayed on the double-sided pressure-sensitive adhesive sheet, and the metal thin film is formed on the die having the unevenness corresponding to the array of the through electrodes, and the die By electrically transferring the metal thin film on the convex surface of the double-sided pressure-sensitive adhesive sheet to the double-sided pressure-sensitive adhesive sheet, the metal thin films arranged so as to cover both end surfaces of the conductive fiber are arranged on the front and back surfaces of the double-sided pressure-sensitive adhesive sheet, thereby electrically connecting. The part is manufactured.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described by way of examples with reference to the drawings. FIG. 1 shows an embodiment of an electrical connecting member according to the present invention. In this example, the conductive fibers 12 are sewn on the double-sided pressure-sensitive adhesive sheet 11 in a direction perpendicular to the sheet surface at a predetermined pitch and held in an array. Both ends of each conductive fiber 12 are located on the front and back surfaces of the double-sided pressure-sensitive adhesive sheet 11, that is, the conductive fibers 12 form a plurality of through electrodes on the double-sided pressure-sensitive adhesive sheet 11. In this example, the double-sided pressure-sensitive adhesive sheet 11 has 49 through electrodes arranged in a grid pattern.

On the front and back surfaces of the double-sided pressure-sensitive adhesive sheet 11, the metal thin film 1 is formed so as to cover both end surfaces of each conductive fiber 12.
3 are arranged, and the metal thin film 13 on the front surface of the double-sided pressure-sensitive adhesive sheet 11 and the corresponding metal thin film 13 on the back surface are electrically connected via the conductive fibers 12. Each metal thin film 13 is arranged so as to adhere to the double-sided pressure-sensitive adhesive sheet 11. The double-sided pressure-sensitive adhesive sheet 11 is made by disposing the pressure-sensitive adhesive 11b on both sides of the insulating sheet 11a.
1b is arranged by coating, for example. Insulation sheet 1
Polyimide, for example, is used as the constituent material of 1a. An elastomer such as rubber can also be used. Also, instead of applying the adhesive 11b, a double-sided tape is used, and one surface of the double-sided tape is attached to the insulating sheet 11a,
The adhesive layer on the other surface can also be used as the adhesive 11b.

[0008] conductive fibers 12 are those obtained by attaching a conductive material such as metal cotton yarn. This adhesion can be performed by using, for example, sputtering or plating, and Au or Cr / Au is used as the material . Metals thin film 13 is, for example, Au / Ni / Au film. FIG. 2 shows a method of manufacturing the electrical connecting member 14 having the above-mentioned configuration in the order of steps, and each step will be described below.

(1) The conductive fibers 12 are sewn into the double-sided adhesive sheet 11 at a predetermined pitch. This sewing operation is performed using, for example, a sewing needle for sewing. At this time, a sewing machine may be used. In the figure, 15 indicates a sewing needle.
(2) Of the conductive fibers 12 sewn in, the portions other than the portions necessary for the through electrodes, that is, the portions protruding above the double-sided pressure-sensitive adhesive sheet 11, are cut and removed. The cutting is performed using scissors 16 or a cutter as shown in the figure.

(3) A metal thin film 13 is formed in advance by sputtering or the like on a mold 17 having protrusions and recesses corresponding to the arrangement of the conductive fibers 12 which remain in the double-sided pressure-sensitive adhesive sheet 11 and are arranged and held to form the through electrodes. The metal thin film 13 on the convex of the mold 17 is adhered to the adhesive 11b of the double-sided adhesive sheet 11 and transferred. This adhesive transfer is performed by peeling the metal thin film 13 at the interface, and thus the adhesion of the metal thin film 13 to the mold 17 is poor. Metal thin film 1
When 3 is an Au / Ni / Au film as described above, the mold 17 is made of, for example, Si.

(4) The metal thin films 13 are provided on both surfaces of the double-sided adhesive sheet 11 by adhesive transfer as described above,
The electrical connection member 14 is completed. A conductive adhesive may be sandwiched between the end faces of the conductive fibers 12 and the metal thin film 13 in order to secure contact conduction between them. FIG. 3 shows an IC using this electrical connection member 14.
The figure shows how the package 18 and the printed wiring board 19 are connected, and the IC package 18 is an LGA.
It is said that.

When the electrode 19a of the printed wiring board 19, the metal thin film 13 forming the contact electrode of the electrical connecting member 14 and the electrode (land) 18a of the IC package 18 are aligned with each other and pressed, the electrical connecting member 14 is pressed. Adhesive 1
1b is deformed by pressing, and in the insulating portion between the adjacent metal thin films 13 as shown in FIG. 3B, the insulating portion between the electrodes 19a of the printed wiring board 19 and the IC package 1
8 adheres to the insulating portion between the electrodes 18a.

By this adhesion, the IC package 18 and the printed wiring board 19 are mechanically coupled and held via the electrical connection member 14, and the corresponding electrodes 18a, 19 are provided.
The a and the metal thin film 13 are brought into pressure contact with each other to be electrically connected, that is, the IC package 18 and the printed wiring board 19 are electrically connected via the electrical connection member 14. At this time, since the contact load is applied between the electrodes 18a, 19a and the metal thin film 13 by the restoring force of the elastically deformed adhesive 11b, a good pressure contact state can be obtained, that is, a good connection state can be obtained. be able to.

Since the adhesive 11b is connected by being adhered, repeated connection (retry) such as peeling off the connected one and reconnecting can be performed relatively easily. In this electrical connection member 14, since the conductive fiber 12 is sewn into the double-sided pressure-sensitive adhesive sheet 11 and the unnecessary electrode is cut and removed, the through electrode is formed. The through electrode can be formed on the adhesive sheet 11 very easily.

Since the adhesive 11b itself is not exposed to a special environment such as chemicals or high temperature, the adhesive 11b
Since b is not damaged, basically, regardless of the type of the adhesive 11b, the adhesive 11b can be selected according to the required performance and application. Incidentally, it can be appropriately selected depending on the performance and applications requiring also Material of the insulating sheet 11a.

Here, as shown in FIG. 3, when used for connecting the IC package 18, this electrical connecting member 14 is used.
The following is an example of the dimensions of each part of. The array pitch of the electrodes 18a of the IC package 18 is 1 mm.・ Insulating sheet thickness: 0.6mm ・ Adhesive thickness: 0.1mm each ・ Conductive fiber diameter: φ0.3mm ・ Metal thin film size: □ 0.5mm ・ Metal thin film thickness: 5 ˜15 μm In the above, the metal thin film 13 of the electrical connecting member 14 is used as an IC.
The electrode 18a of the package 18 and the printed wiring board 19
Although the case where the electrodes are connected to each other by aligning them with the electrodes 19a of the above is shown, in the electric connecting member 14, the conductive fiber 12 is used.
Since the through electrodes are formed in a grid by
The array pitch of the conductive fibers 12 is narrowed, and the metal thin film 13
By narrowing the size of the anisotropic conductive film, it is possible to obtain an anisotropic conductive film that can be more easily aligned.

In this case, the metal thin film 13 is applied to the electrodes 18a and 19a of the IC package 18 and the printed wiring board 19, respectively.
Since it is not necessary to align the electrodes 18a and 19a, it is only necessary to align the electrodes 18a and 19a, and the connection work can be performed more easily. Further, the conventional anisotropically conductive film requires heating, for example, for connection, that is, it is close to permanent connection and it is generally difficult to retry connection, but in this example, retry is relatively easy as described above. It is possible to obtain an anisotropic conductive film that can be obtained.

In the above-mentioned electrical connection member 14, metal thin films 13 are provided on both end surfaces of the conductive fiber 12,
As a result, the contact area is increased and the conductive fiber 1
Although the end face 2 is protected, the metal thin film 13 may not be provided, for example. FIG. 4 shows an electric connecting member 21 having a structure in which conductive fibers 12 are simply sewn on and arrayed and held on such a double-sided pressure-sensitive adhesive sheet 11.

According to this electric connecting member 21, the structure is further simplified, and it can be easily manufactured by the steps (1) and (2) in FIG. In addition, the conductive fiber 1
Since there is no metal thin film that covers the end face of No. 2, the pitch can be narrowed more easily, that is, the anisotropic conductive film as described above can be more easily configured.

[0020]

As described above, according to the present invention, it is possible to obtain an electric connecting member which can easily cope with a narrower pitch, a larger number of cores, and a smaller size, and which can be manufactured easily and inexpensively. In addition, since the adhesive adheres to each other, mechanical connection and electrical connection are made. Therefore, the connection can be easily made by simply sticking them together, and the repeated connection (repeated use) can be made relatively easily. Therefore, it is possible to obtain an electrical connection member that is extremely convenient in these respects.

[Brief description of drawings]

FIG. 1A is a perspective view showing an embodiment of the invention of claim 2;
B is the enlarged sectional view.

2A to 2C are process drawings for explaining a method for manufacturing the electrical connecting member shown in FIG.

3A is a view for explaining the connection between an IC package and a printed wiring board using the electric connection member shown in FIG. 1, and B is a partially enlarged cross-sectional view of the connected state.

FIG. 4A is a perspective view showing an embodiment of the invention of claim 1;
B is the enlarged sectional view.

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-11-86944 (JP, A) JP-A-7-312116 (JP, A) JP-A-2000-82512 (JP, A) JP-A-5-62727 (JP, A) JP 2000-149665 (JP, A) Actual development Sho-58-183781 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01R 11/01 501 H01B 5 / 16 H01B 13/00 501 H01R 43/00

Claims (4)

(57) [Claims] 1. A double-sided pressure-sensitive adhesive sheet in which a pressure-sensitive adhesive is arranged on both sides of an insulating sheet, and the double-sided pressure-sensitive adhesive sheet is sewn into the double-sided pressure-sensitive adhesive sheet and held in an array. It is positioned Ri Na more conductive fibers constituting the through electrodes, the conductive fibers it is adhered conductive material cotton yarn
An electrical connection member characterized in that it is supposed to be . 2. A double-sided pressure-sensitive adhesive sheet in which a pressure-sensitive adhesive is arranged on both sides of an insulating sheet, and the double-sided pressure-sensitive adhesive sheet is sewn into the double-sided pressure-sensitive adhesive sheet and held in an array. conductive fibers forming the through-electrode is positioned, Ri Na more and their metal thin film arranged is adhered to the front and back surfaces of the double-sided pressure-sensitive adhesive sheet so as to cover each of the both end surfaces of the conductive fibers, the Conductive fibers are made of conductive material that is not attached to the wool.
An electrical connection member characterized in that it is supposed to be . 3. Conducting a conductive material by attaching a conductive substance to the silk thread.
Forming a sexual fibers, which adhesive disposed on both sides of the insulating sheet stitching the conductive fibers on both sides adhesive sheet comprising, protrudes above the double-sided pressure-sensitive adhesive sheet of the sewn's conductive fiber sections A method for manufacturing an electrical connecting member, characterized in that the through electrode is formed by cutting and removing the conductive fiber remaining in the double-sided pressure-sensitive adhesive sheet and held in an array. 4. Conducting a conductive material by attaching a conductive substance to the silk thread.
Forming a sexual fibers, which adhesive disposed on both sides of the insulating sheet stitching the conductive fibers on both sides adhesive sheet comprising, protrudes above the double-sided pressure-sensitive adhesive sheet of the sewn's conductive fiber sections By cutting and removing, the through electrodes are formed by the conductive fibers remaining in the double-sided pressure-sensitive adhesive sheet and held in an array, and the metal thin film is formed on the mold having the irregularities corresponding to the array of the through electrodes. By forming and transferring the metal thin film on the convex of the mold to the double-sided pressure-sensitive adhesive sheet, the front and back surfaces of the double-sided pressure-sensitive adhesive sheet are arranged so as to cover both end surfaces of the conductive fiber. A method of manufacturing an electrical connecting member, comprising providing a thin metal film.