JP2002093492A - Electrical connection device - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to obtain a reliable electric connection between a wiring of a wiring board having no connection land and a corresponding connection land. An electrical connection device includes: a connection sheet having a plurality of terminals that penetrate an electrically insulating sheet material in a thickness direction and protrude on both surfaces of the sheet material; A first wiring board and a first wiring board each having a plurality of wirings arranged on each other and having a plurality of wirings on at least one surface of the electrically insulating substrate. Each wiring board has a plurality of connecting portions that penetrate the substrate in the thickness direction, are exposed on both surfaces of the substrate, and follow the wiring. Each end of each terminal has a conical or pyramid shape and is in contact with an exposed portion of the connecting portion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrical connection device using a plurality of wiring boards such as a multilayer wiring board.

[0002]

2. Description of the Related Art In general, a multilayer wiring board is formed by superposing a plurality of wiring boards each having a plurality of first wirings formed of wiring patterns formed on a substrate, and individually connecting the first wirings to the first wirings. A connection land such as the second wiring is formed on at least one surface of the wiring board. Each first wiring of the wiring board on which no connection land is formed is connected to the corresponding connection land by a conductive portion penetrating one or more other wiring boards.

In such a multilayer wiring board, a plurality of through holes for forming a conductive portion must be formed in a state extending over a plurality of wiring boards. Forming holes for each wiring is technically difficult and therefore expensive.

As one technique for solving this kind of problem, a projection is used as each conductive portion, and the other wiring board is deformed by the projection so that the projection is moved from one surface of the other wiring board to the other surface. Is connected to the corresponding connection land by connecting the wiring of the wiring board having no connection land.

[0005]

However, in this prior art,
Since only the tip of the projection is pressed into contact with the corresponding connection land, the electrical connection between the projection and the connection land is insufficient, and therefore the wiring of the wiring board having no connection land and the wiring Cannot be connected in a good electrical connection state with the corresponding connection land.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to obtain a reliable electric connection between a wiring of a wiring board having no connection land and a corresponding connection land.

[0007]

According to the present invention, there is provided an electric connecting apparatus comprising: a connecting sheet having a plurality of terminals which penetrate an electrically insulating sheet material in a thickness direction and project from both sides of the sheet material; A first wiring board and a second wiring board each having a plurality of wirings on at least one surface of the electrically insulating substrate, the first and second wiring boards being respectively arranged on one and the other surfaces of the sheet so as to overlap each other. Each wiring board has a plurality of connecting portions that penetrate the substrate in the thickness direction, are exposed on both surfaces of the substrate, and follow the wiring. Each end of each terminal has a conical or pyramid shape and is in contact with an exposed portion of the connecting portion.

According to another aspect of the present invention, there is provided an electric connection device comprising: a connection sheet having a plurality of terminals which penetrate an electrically insulating sheet material in a thickness direction and projecting from both sides of the sheet material; Wiring boards on at least one surface of the insulating substrate are alternately arranged. Each wiring board has a plurality of connecting portions that penetrate the substrate in the thickness direction, are exposed on both surfaces of the substrate, and follow the wiring. Each end of each terminal has a conical or pyramid shape and is in contact with an exposed portion of the connecting portion.

[0009] Still another electrical connection device according to the present invention includes:
A connection sheet having a plurality of terminals penetrating the electrically insulating sheet material in the thickness direction and projecting to both sides of the sheet material, and a plurality of terminals each arranged and superimposed on one and the other surface of the connection sheet; First and second wiring boards having wiring on at least one surface of the electrically insulating substrate.
Each wiring board has a plurality of connecting portions exposed on the at least one surface and following the wiring. Each end of each terminal has a conical or pyramid shape and is in contact with an exposed portion of the connecting portion.

[0010] Still another electrical connection device according to the present invention is a connection sheet having a plurality of terminals that penetrate an electrically insulating sheet material in a thickness direction and protrude on both surfaces of the sheet material; A first wiring board and a first wiring board, each of which is disposed on one of the other surfaces and has a plurality of wirings on at least one surface of the electrically insulating substrate. Each wiring board has a plurality of connecting portions exposed on the at least one surface and following the wiring, and an end of each terminal has a conical or pyramidal shape. One end of each terminal is in contact with the exposed portion of the connection portion, while the other end of each terminal is connected to the substrate of one of the first and second wiring boards. It penetrates in the thickness direction and is in contact with the corresponding connection portion.

The wiring or connection portion of the outermost wiring board is also used as a connection land. Each of the conical or pyramid-shaped terminal ends bites into a corresponding connection portion when the connection sheet and the wiring board are overlapped and pressed. Therefore, according to the present invention, the terminal and the connection portion are electrically connected reliably.

[0012] The electrically insulating substrate may include a film-shaped substrate formed of an electrically insulating material. By doing so, the present invention can be applied to a flexible film cable such as a flat cable.

[0013] Both ends of each of the terminals may be bonded to the corresponding connection portions by a conductive adhesive. By doing so, the terminal and the connection portion can be more reliably electrically connected.

[0014] The plurality of connection portions may include one or more conductive through holes. By doing so, the tip of each terminal can be inserted into the through hole,
The relative displacement between the wiring board and the connection sheet is prevented,
The terminals and the connection portions are maintained in a good electrical connection state.

[0015] Each terminal is formed in a through portion penetrating the sheet material in the thickness direction, a seat portion connected to one end of the through portion, a seat portion connected to the other end of the through portion, and the seat portion. With a projection,
Each protrusion may have a conical or pyramidal shape. With such a configuration, after forming the through portion, the one seat portion, and the protrusion formed on the one seat portion on the sheet material, the other seat portion and the protrusion formed on the other seat portion are separated from each other. By bonding the other seat to the other end of the through portion, a connection sheet can be formed, and therefore, the manufacture of the connection sheet is facilitated.

Both ends of each terminal can enter into the corresponding connection. In addition, each wiring board may further include one or more second connection portions using a part of the wiring.

Each of the wiring boards may have the one surface facing the connection sheet. By doing so, each of the conical or pyramid-shaped terminal ends bites into the exposed portion of the corresponding connection portion, and the terminal and the connection portion are more reliably electrically connected.

Each of the wiring boards further has one or more second connection portions utilizing a part of the wiring, and the connection sheet further penetrates the sheet material in a thickness direction. One or more second terminals protruding from both sides of the material, both ends of the second terminal having a conical or pyramidal shape, and one end of the second terminal is connected to the second terminal; The first and second wiring boards may be in contact with the exposed portion of the connection portion, and the other end of the second terminal may be in contact with the second connection portion. With this configuration, even in the case of an electrical connection device in the form of a multilayer wiring board in which wiring boards and connection sheets are alternately arranged in a stacked state, the connection portion or wiring of one of the outermost wiring boards is arranged. It can be electrically connected to the wiring or the connection portion of the other wiring board disposed on the outermost side.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 to 4, an electric connection device 10 includes four wiring boards 12 and three connection sheets 14, and the connection sheets 14 are located between the wiring boards 12. So that they are alternately stacked, and they are
In the form of a multi-layered wiring board joined together.

Each wiring board 12 includes an electrically insulating substrate 20.
And a plurality of wirings 22 formed on one surface of the substrate 20
A plurality of first connecting portions 24 which penetrate the substrate 20 in the thickness direction and are exposed on both surfaces of the substrate 20 and individually follow the wirings 22; And a plurality of second connection portions 26 exposed on the surface.

The substrate 20 is formed in a plate shape from an electrically insulating material such as a synthetic resin such as polyimide or ceramic. Each wiring 22 is a strip-shaped wiring part that forms a part of a wiring pattern formed on the substrate 20. Each first connection portion 24 has a through-hole 28 and
It functions as a penetrating connection part penetrating through 0, that is, a conductive through hole. Each second connection part 26 is formed by one end of the wiring 22 and functions as an uncompleted connection part that does not penetrate the substrate 20.

Each of the first connecting portions 24 includes a penetrating portion 30 penetrating the substrate 20 in the thickness direction, a seat portion 32 connected to one end of the penetrating portion 30, and a seat portion connected to the other end of the penetrating portion 30. 34. At least some of the seats 32 (or 34)
It functions as a part of the wiring 22. The seats 32 and 34 are exposed on one surface of the substrate 20 and protrude from the one surface.

Each connection sheet 14 has a film material having flexibility and electric insulation, such as a polyimide film, that is, a sheet material 36, and penetrates the sheet material 36 in the thickness direction and protrudes on both surfaces of the sheet material 36. It has a plurality of terminals 38.

Each terminal 38 has a rod-shaped penetrating portion 40 penetrating the sheet material 36 in the thickness direction, a seat 42 connected to one end of the penetrating portion 40, a seat 44 connected to the other end of the penetrating portion 40, Protrusions 46 and 48 respectively formed on the seats 42 and 44 are provided. Each projection 46, 48 has a conical shape with a sharp tip selected from a cone and a pyramid.

Each terminal 38 of the connection sheet 14 corresponds to the first or second connection portion 24 or 26 of the wiring board 12 arranged next to the corresponding connection sheet 14. For this reason, the wiring 22 and the connecting portions 24 and 26 of each wiring board 12 are formed according to the arrangement pattern of the terminals 38 of the connection sheet 14 arranged on both sides thereof.

The wiring 22 of each wiring board 12 is formed from a conductive material such as copper. On the other hand, the terminals 38 of each connection sheet 14, especially the protrusions 46 and 48, are formed of a conductive material harder than the wiring 22, such as nickel. The protruding portions 46 and 48 of each terminal 38 abut against the corresponding connecting portion 24 or 26, respectively, and are pressed against the corresponding connecting portion 24 or 26 by the stopper 16, so that the corresponding connecting portion 24 Or 26.
For this reason, the terminal 38 and the connection part 24 or 26 are electrically connected reliably.

The corresponding connection parts 24, 26 and terminal 38
Are bonded by a conductive adhesive 50 such as solder. For this reason, the terminal 38 and the connection part 24 or 26 are more reliably electrically connected.

Each wiring board 12 is provided with a wiring 2 by a printed wiring method.
2 and a technique of forming through holes for each connecting portion in the substrate 20 and the wiring 22 by etching or laser processing and forming a connecting portion 24 using those through holes. Can be manufactured.

In each connection sheet 14, a penetration portion 40, one seat portion 42, and a projection portion 46 are integrally formed on the sheet material 36 by electroplating or the like, and the other seat portion 44 and the other projection portion are formed. It can be manufactured by forming the portion 48 with the electroplating method or the like in a separate step, and bonding the protrusion 48 to the end of the through portion 40 at the seat portion 44. By doing so, the production of the connection sheet becomes easy.

The wiring board 12 and the connection sheet 14 formed as described above are alternately laminated so that the connection sheet 14 is located between the wiring boards 12 and pressed by heating while applying the conductive adhesive 50. To connect the terminal and the connection portion, and in this state, the connection is made by the plurality of fasteners 16.

When connecting the wiring board 12 and the connection sheet 14 as described above, the projections 46 and 48 of the plurality of terminals 38 enter the corresponding through holes 28 of the connection portion 24.
The relative displacement between the adjacent wiring board 12 and the connection sheet 14 is prevented, and the terminals and the connection portions are maintained in a good electrical connection state.

A heat-meltable adhesive material such as a hot-melt resin is disposed in at least a part of the space between the adjacent wiring boards 12 and the connection sheets 14, and the adjacent wiring boards 12 and the connection sheets 14 are separated from each other. At the time of heating and pressing, they may be bonded to each other with an adhesive material.

In the electrical connection device 10, each connection part 24 of the wiring board 12 located at the upper end is connected to the wiring 22 and the connection part 26 of the wiring board 12, the corresponding terminal 38 of each connection sheet 14, and the middle. Via the connecting portions 24, the wirings 22 and the connecting portions 26 of the respective wiring boards 12 located, the connecting portions 24, the wirings 22 and the connecting portions 26 of the wiring board 12 located at the lower end are reliably and electrically connected.

Therefore, the connection portion 24, the wiring 22 and the connection portion 26 of the wiring board 12 located at the upper end or the lower end can be used as connection lands connected to appropriate electric circuits, appropriate electric components and the like. . The electrical connection device 10
It can be used as various wiring boards and connection boards such as a wiring board of a probe card for integrated circuit inspection, a wiring board for assembling electric components, a wiring board for connecting different electric circuits and electric components, and the like.

In the above embodiment, the four wiring boards 12 and 3
Although one connection sheet 14 is used, the present invention provides that as long as the connection sheet 14 is located between the wiring boards 12,
It can be applied to an electrical connection device in which two or more wiring boards 12 and one or more connection sheets 14 are alternately stacked,
Both the wiring board 12 and the connection sheet 14 can be applied to a flexible film cable such as a flexible flat cable.

Referring to FIGS. 5 to 8, the electrical connection device 60 includes two wiring boards 62 and one connection sheet 64.
Are laminated so that the connection sheet 64 is positioned between the two wiring boards 62, and they are connected to each other by a plurality of fasteners 16 to form a multilayer wiring board.

Each wiring board 62 is the same as wiring board 12 of electrical connection device 10 shown in FIGS. 1 to 4 except that a plurality of wirings 22 are formed on both surfaces of electrically insulating substrate 20. Is formed. The connection sheet 64 is formed in the same manner as the connection sheet 14 of the electrical connection device 10. Therefore, the electrical connection device 60 can be manufactured and used in the same manner as the electrical connection device 10, and the same operational effects as those of the electrical connection device 10 can be obtained.

In the electrical connection devices 10 and 60, the wiring boards 20 and 62 may be formed into a film-like substrate by using a flexible sheet or film such as a polyimide film as the substrate 20.

Referring to FIGS. 9 to 12, the electrical connection device 70 includes two wiring boards 72 and one connection sheet 74.
Are laminated in such a manner that the connection sheet 74 is located between the two wiring boards 72, and are formed in the form of a flat cable connected by a plurality of appropriate fasteners 16.

Each wiring board 72 is formed in the form of a film-like substrate including a band-shaped sheet or film 80 made of an electrically insulating material, and a plurality of strip-shaped wirings 82 formed on one surface of the film 80. In addition, a predetermined length region at one end of each wiring 82 is a connection portion 84 exposed on one surface of the film 80.

The film 80 is made of a flexible material such as polyimide. The wiring 82 is a part of the printed wiring pattern, and extends in the longitudinal direction of the film 80 at intervals in the width direction of the film 80. The arrangement pattern of the wiring 80 of both wiring boards 72 is the same.

The connection sheet 74 is an electrical connection device shown in FIGS. 1 to 4 except that the arrangement pattern of the terminals 38 on the sheet material 36 is different and that the connection sheet 74 has a rectangular shape long in the width direction of the film 80. It is formed in the same manner as the ten connection sheets 14. Therefore, each terminal 38 includes a through portion 40, a seat portion 42, a seat portion 44, and protrusions 46 and 48.

The terminals 38 of the connection sheet 74 are arranged in two rows so that the two terminals 38 commonly correspond to one connection portion 84 of the wiring board 72. Each terminal 38 and the corresponding connection portion 84 are bonded by a conductive adhesive 50 such as solder.

The electrical connection device 70 can be manufactured and used in the same manner as the electrical connection device 10 except that both the wiring boards 72 have the wiring 82 facing the connection sheet 74. It is possible to obtain the same operation and effect as the electrical connection device 10 and to form a long flat cable.

Referring to FIGS. 13 and 14, similarly to the electrical connection device 70, the electrical connection device 90 connects two wiring boards 92 and one connection sheet 94 with each other.
Are formed so as to be located between the two wiring boards 92, and are formed in the form of a flat cable connected by a plurality of appropriate fasteners (not shown).

One wiring board 92 is formed similarly to wiring board 72 in electrical connection device 70. The other wiring board 92 is formed in the same manner as the wiring board 72 in the electrical connection device 70 except that the film 80 has a plurality of holes 96 for receiving the terminals 38 of the connection sheet 94. Each hole 96 can be formed from a side opposite to the wiring 82 by laser processing at a position corresponding to the connection portion 84 and the terminal 38.

The connection sheet 94 has the same structure as that of FIG. 9 except that the terminal 38 does not have the seat portion 44 but the through portion 40 projects from the film 36 toward the wiring board 92 having the hole 96. To the connection sheet 74 of the electrical connection device 70 shown in FIG.

One wiring board 92 faces the wiring 82 toward the connection sheet 94, and the other wiring board 92 faces the opposite side of the wiring 82 toward the connection sheet 94. Each terminal 38 is bonded to the connection portion 84 of one wiring board 92 by a conductive adhesive 50 at one projection 46, and the other projection 48 and the protruding portion of the penetrating portion are connected to the other wiring board 92. And is bonded to the connection portion 84 of the other wiring board 94 by the conductive adhesive 50 at the other projection 48.

The electrical connection device 90 also includes the conductive adhesive 50.
Can be manufactured and used in the same manner as the electrical connection device 70 except that the electrical connection device 70 is disposed by dropping it into the hole 96 of the other wiring board 92.
The same operation and effect can be obtained, and a long flat cable can be formed.

In the electrical connection devices 70 and 90, a plurality of connection lands individually electrically connected to the wiring 82 may be provided at the end of each of the wiring boards 72 and 92 opposite to the connection portion 84. Such connection lands are connected to the electrical connection device 1.
0 may be similar in shape to the connection 24.

In any of the above embodiments, when the connection portion and the terminal are bonded by a conductive adhesive, when the wiring board and the connection sheet are bonded by an adhesive, the adjacent wiring board and the connection sheet are bonded. If the connection sheet and the connection sheet are connected so as not to be relatively movable, the stopper may not be used. Also,
In any of the above embodiments, it is preferable that the wiring board and the sheet material have one or more alignment marks used for their alignment.

The present invention is not limited to the above embodiment. The present invention can be variously modified without departing from the gist thereof.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of an electrical connection device according to the present invention.

FIG. 2 is a cross-sectional view for explaining the electrical connection device shown in FIG.

FIG. 3 is an exploded perspective view of the electrical connection device shown in FIG.

FIG. 4 is an exploded sectional view of the electrical connection device shown in FIG.

FIG. 5 is a perspective view showing a second embodiment of the electrical connection device according to the present invention.

FIG. 6 is a cross-sectional view for explaining the electrical connection device shown in FIG.

7 is an exploded perspective view of the electrical connection device shown in FIG.

8 is an exploded sectional view of the electrical connection device shown in FIG.

FIG. 9 is a perspective view showing a third embodiment of the electrical connection device according to the present invention.

10 is an exploded perspective view of the electrical connection device shown in FIG.

11 is a sectional view taken along line 11-11 in FIG. 9;

12 is an exploded cross-sectional view of the electrical connection device shown in FIG.

FIG. 13 is a sectional view showing a fourth embodiment of the electrical connection device according to the present invention.

14 is an exploded cross-sectional view of the electrical connection device shown in FIG.

[Explanation of symbols]

 10, 60, 70, 90 Electrical connection device 12, 62, 72, 92 Wiring board 14, 64, 74, 94 Connection sheet 16 Fastener for bonding 20 Substrate 22, 82 Wiring 24, 26, 84 Connection part 28 Through Hole 30 Penetration part of connection part 32, 34 Seat part of connection part 36 Sheet material 38 Terminal 40 for connection 40 Penetration part of terminal 42, 44 Seat part of terminal 46, 48 Projection part of terminal 50 Conductive adhesive material 52, 54 Hole for bonding 80 film

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference)

Claims (11)

[Claims] 1. A connection sheet having a plurality of terminals that penetrate an electrically insulating sheet material in a thickness direction and protrude on both surfaces of the sheet material, and are disposed so as to be overlapped on one and the other surfaces of the connection sheet, respectively. And first and second wiring boards each having a plurality of wirings on at least one surface of the electrically insulating substrate, wherein each wiring board penetrates the substrate in a thickness direction and is provided on both surfaces of the substrate. It has a plurality of connecting portions that are exposed and follow the wiring, and each end of each terminal has a conical or pyramidal shape and is in contact with an exposed portion of the connecting portion. Electrical connection device. 2. A connection sheet having a plurality of terminals penetrating an electrically insulating sheet material in a thickness direction and projecting on both surfaces of the sheet material, and a plurality of wirings on at least one surface of the electrically insulating substrate. Wiring boards are alternately arranged, and each wiring board has a plurality of connecting portions that penetrate the substrate in the thickness direction, are exposed on both surfaces of the substrate, and are connected to the wiring, and Each end of the electrical connection device has a conical or pyramidal shape and is in contact with an exposed portion of the connection portion. 3. A connection sheet having a plurality of terminals penetrating an electrically insulating sheet material in a thickness direction and projecting on both surfaces of the sheet material, and disposed on one and the other surfaces of the connection sheet, respectively. And first and second wiring boards each having a plurality of wirings on at least one surface of the electrically insulating substrate, wherein each wiring board is exposed on the at least one surface and is connected to the plurality of wirings. An electrical connection device having a connection portion, wherein each end of each terminal has a conical or pyramid shape and is in contact with an exposed portion of the connection portion. 4. A connection sheet having a plurality of terminals penetrating an electrically insulating sheet material in a thickness direction and protruding on both surfaces of the sheet material, and disposed on one and the other surfaces of the connection sheet, respectively. And first and second wiring boards each having a plurality of wirings on at least one surface of the electrically insulating substrate, wherein each wiring board is exposed on the at least one surface and is connected to the plurality of wirings. A connection portion; an end of each terminal has a conical or pyramidal shape; one end of each terminal is in contact with an exposed portion of the connection portion; and the other end of each terminal The electrical connection device, wherein the portion penetrates the substrate of one of the first and second wiring boards in a thickness direction and is in contact with the corresponding connection portion. 5. The electrical insulating substrate according to claim 1, wherein the electrical insulating substrate includes a film-shaped substrate formed of an electrical insulating material.
The electrical connection device according to any one of the above. 6. The multilayer wiring board according to claim 1, wherein both ends of each of the terminals are bonded to a corresponding connection portion with a conductive adhesive. 7. The electrical connection device according to claim 1, wherein the plurality of connection portions include one or more conductive through holes. 8. Each of the terminals is formed on a penetrating portion penetrating the sheet material in the thickness direction, a seat portion connected to one end of the penetrating portion, a seat portion connected to the other end of the penetrating portion, and the seat portion. 8. The electrical connection device according to claim 1, further comprising: a projected portion, wherein each projected portion has a conical shape or a pyramid shape. 9. The electrical connection device according to claim 1, wherein both ends of each terminal are inserted into a corresponding connection portion. 10. The wiring board according to claim 1, wherein said one surface faces the connection sheet.
The electrical connection device according to any one of 7, 8, and 9. 11. Each wiring board further has one or more second connection parts utilizing a part of the wiring, and the connection sheet further penetrates the sheet material in a thickness direction. One or more second terminals protruding from both sides of the sheet material, both ends of the second terminal have a conical or pyramidal shape, and one end of the second terminal is The first and second wiring boards are in contact with the exposed portion of the connection portion, and the other end of the second terminal is in contact with the second connection portion. , 3,5,6,7,8,9 and 1
0. The electrical connection device according to any one of 0.