JP2003017158A - Pressure contact type sheet connector, and manufacturing method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure contact type sheet connector which can easily and rightly connect miniaturized connection terminals with connection terminal pitch of 0.2 mm/connection terminal size of (square)0.1 mm or less, and to provide a manufacturing method of the same. SOLUTION: The sheet connector has an elastic sheet 7 having insulation property, interposed between a testing base board 10 and connection terminals 11, 21 of a semiconductor chip 20, and a conductive thin wire 1 of which, peripheral surface is coated by insulation coating 2, penetrating into and supported by the sheet 7, made to contact with the connection terminals 11, 21 with pressure. Not less than four pieces of conductive thin wires 1 are made to contact with respective connection terminals 11, 21 with pressure in the case of connection terminal pitch of 0.2 mm/connection terminal size of (square)0.1 mm or less.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an electric / electronic component,
The present invention relates to a pressure contact type sheet connector used for electrical connection of a mounting board, an inspection board and the like, and a manufacturing method thereof.

[0002]

2. Description of the Related Art Conventionally, in the case of manufacturing a pressure contact type sheet connector, JP-A-6-251848 and JP-A-10-2 are used.
The manufacturing method disclosed in No. 2033 or Japanese Utility Model Laid-Open No. 3-97889 is adopted. First, Japanese Patent Laid-Open No. 6-25
When manufacturing a press contact type sheet connector according to No. 1848, as shown in FIGS. 14 (a), (b) and (c), a plurality of conductive thin wires 1 are arranged on a rectangular sheet 30 at a predetermined interval,
A plurality of sheets 30 are laminated with the conductive thin wires 1 aligned with each other with an adhesive layer 31 interposed therebetween to form a laminated body 32.
By slicing 2 in the direction orthogonal to the conductive thin wire 1, it is possible to manufacture a pressure contact type sheet connector in which a plurality of conductive thin wires 1 are arranged vertically to the pressure contact connection surface.

In the case of manufacturing a pressure contact type sheet connector according to Japanese Patent Laid-Open No. 10-22033, FIG.
As shown in (b) and (c), a rectangular sheet 3 is formed by coating the peripheral surfaces of a plurality of conductive thin wires 1 with polyvinyl chloride or the like.
A plurality of conductive thin wires 1 are arranged at 0 at a predetermined interval via the adhesive layer 33, the conductive thin wires 1 are aligned in the direction, and a plurality of sheets 30 are stacked via the adhesive layer 31 to form a laminate 32. By slicing the laminated body 32 in a direction orthogonal to the conductive thin wires 1, it is possible to manufacture a pressure contact type sheet connector in which a plurality of conductive thin wires 1 are arranged vertically to the pressure contact connection surface. In the case of manufacturing a pressure contact type sheet connector according to Japanese Utility Model Laid-Open No. 3-97889, as shown in FIGS. 16 (a) and 16 (b), a plurality of conductive thin wires 1 are cut into a predetermined size and the peripheral surface thereof is cut. If the conductive thin wires 1 are covered with polyvinyl chloride or the like, and the conductive thin wires 1 are arranged vertically so as to be molded with the insulating elastic plastic 34, the conductive thin wires 1 are pressure-welded in such a manner that the conductive thin wires 1 are vertically aligned with the connection surface. A mold sheet connector can be manufactured.

[0004]

By the way, as electric / electronic parts have become more sophisticated and products have become smaller, connection terminals for electric / electronic parts, mounting boards, inspection boards, etc. have become finer. Assuming that these connection terminal pitches are 0.2 mm / connection terminal size □ 0.1 mm, it is preferable to connect four or more conductive thin wires 1 to each connection terminal for stable connection. A fine array with a pitch of 0.05 mm or less is required. However, JP-A-6-25
In the case of the pressure contact type sheet connector manufactured by No. 1848, in order to maintain insulation between the adjacent conductive thin wires 1,
Since the adhesive layer 31 is required, it becomes difficult to make a fine arrangement.

In the case of the pressure contact type sheet connector manufactured according to Japanese Patent Laid-Open No. 10-22033, the sheet 30 is used.
Although a fine arrangement is possible when a plurality of conductive thin wires 1 are arranged in the above, the fine arrangement is still difficult because an adhesive layer 31 is required when forming a laminated body 32 by laminating a plurality of sheets 30. Becomes Furthermore, actual Kaihei 3-
In the case of the pressure contact type sheet connector manufactured by No. 97889, the fine arrangement itself is possible, but since it is manufactured one by one, it is not possible to improve the productivity.

The present invention has been made in view of the above, and the connection terminal pitch is 0.2 mm / the connection terminal size is □ 0.1 mm.
An object of the present invention is to provide a pressure contact type sheet connector which can easily and satisfactorily connect between miniaturized connection terminals and a method for manufacturing the same.

[0007]

In order to achieve the above object, in the invention according to claim 1, an electrically insulating sheet for electrically connecting between the connection terminals and interposed between the connection terminals. And a plurality of conductive thin wires that are supported on the sheet with an insulating coating on the peripheral surface and are in contact with the connection terminals. The conductive thin wires are connected to each of the connection terminals at a connection terminal pitch of 0.2 mm / connection terminal. 4 for size □ 0.1mm
The feature is that more than one book is connected.

In order to achieve the above-mentioned object, a second aspect of the present invention is a method of manufacturing a method for electrically connecting between connection terminals, which comprises a plurality of conductive thin wires whose peripheral surfaces are insulation-coated. Bundling them to create an environment with a vacuum degree of 0 to 50 kPa, and a viscosity of 5,000 P between the conductive thin wires.
While filling the following uncured liquid insulating material, the liquid insulating material is cured to form a block body, and the end portion of each conductive thin wire is cut by cutting the block body in a direction substantially orthogonal to the conductive thin wire. It is characterized by exposing. In addition,
It is preferable to connect four or more conductive thin wires to each connection terminal when the connection terminal pitch is 0.2 mm / connection terminal size □ 0.1 mm.

Here, examples of the electrical joint having the connection terminal in the claims include at least electric / electronic components such as flip chips, various mounting boards including printed circuit boards, inspection boards, and the like. . Substantially orthogonal includes both orthogonal and what is recognized as approximately orthogonal.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment of the present invention will be described below with reference to the drawings. A pressure contact type sheet connector according to the present embodiment has an inspection substrate 10 as shown in FIG.
And the insulating and elastic sheet 7 interposed between the connection terminals 11 and 21 of the semiconductor chip 20 and the peripheral surface of the sheet 7 which is insulation-coated 2 and is penetratingly supported side by side in the thickness direction of the sheet 7.・ A plurality of conductive thin wires 1 pressed against 21 are provided, and the conductive thin wires 1 are connected to the respective connection terminals 11 ・ 21.
Connection terminal pitch 0.2 mm / connection terminal size □ 0.1 m
In the case of m, four or more pressure contacts are made.

Explaining the manufacturing method of this pressure contact type sheet connector, first, the peripheral surfaces of a plurality of linear conductive thin wires 1 are each coated with an insulating coating (see FIG. 2) 2, and the plurality of conductive thin wires 1 are stacked. Bundle them together (see Figure 3). Examples of the conductive thin wires 1 include metal wires such as copper, tungsten, nickel and gold, alloys such as brass and phosphor bronze, carbon fibers and the like, but are not limited to these and have a specific volume resistance. Has an electrical conductivity of 10 Ωcm or less, and any processing described below is possible. The insulating coat 2 is processed by a known enameled wire method, a known marhole wire method, a known insulating resin baking method, an extrusion molding method, a coating method, and a dipping method. Examples of the method include, but are not limited to, any method may be used as long as it exhibits insulating properties.

As the insulating coat 2, a material having a volume resistivity of 10 ¹⁰ Ωcm or more is used, and the thickness of the coat is preferably 0.1 μm or more. Regarding the degree of insulation, the insulation characteristics required between the connection terminals 11 and 21 are applied as they are when used as a pressure contact type sheet connector. When used as a pressure-contact type sheet connector, it preferably has an insulation property of 1 MΩ or more with 0.2 mm intervals in the pressure-contact connection surface direction, although it varies depending on the use conditions.

Each conductive thin wire 1 has a wire diameter of usually 1 to 50 μm. This is because if the wire diameter is less than 1 μm, the strength is insufficient and the wire is easily cut during processing, and the workability is reduced. On the contrary, when it exceeds 50 μm, it becomes difficult to cut in the slicing step described later, and when the pressure contact type sheet connector is used, the pitch of the conductive thin wires 1 provided with the insulation coat 2 becomes rough.

As a method for bundling a plurality of conductive thin wires 1, a plurality of conductive thin wires 1 having an insulation coating 2 are cut into a certain size, and the plurality of conductive thin wires 1 are oriented in a fixed direction in a block pattern. Bundle in. However, a method of bundling the plurality of conductive thin wires 1 with the insulating coating 2 by a method of winding on a bobbin or the like, and then cutting it into an example size may be used.
The bundling size is determined according to the outer size of the pressure contact type sheet connector. The length of the fixed dimension for cutting the plurality of conductive thin wires 1 is preferably 300 mm or less. This is because when the length exceeds 300 mm, uncured liquid insulating material 5
This is because the work after filling of the slab becomes difficult, the escape to the stress at the time of subsequent slicing becomes large, and the workability deteriorates.

Next, a plurality of conductive thin wires 1 bundled in a mold 3 are inserted, and a reduced pressure environment 4 having a degree of vacuum of about 0 to 50 kPa is formed between at least a plurality of the conductive thin wires 1, and the plurality of conductive thin wires 1 are bundled. An uncured liquid insulating material 5 between the conductive thin wires 1
And the liquid insulating material 5 is heated and hardened to form a rectangular block body 6 (see FIG. 4). As the liquid insulating material 5 having fluidity in the raw material state, known adhesives such as cyanoacrylate adhesives, vinyl chloride-vinyl acetate copolymer adhesives, known thermoplastic resins such as vinyl chloride resin and polyethylene resin Known thermosetting resins include silicone resins and polyurethane resins. The viscosity of the liquid insulating material 5 is 5,000 P or less, preferably 10
About 1,000 P is good. It has a viscosity of 5,000
If it exceeds P, it becomes difficult to fill the liquid insulating material 5 between the plurality of conductive thin wires 1.

Then, the block body 6 is thinly cut in a direction orthogonal to the axial direction of the conductive thin wires 1 to form a large number of square sheets 7, and both press-connecting surfaces of the thin sheets 7 are connected to both end surfaces of each conductive thin wire 1. 8 is exposed, and then both end faces 8 of each conductive thin wire 1 are subjected to electroless plating,
The pressure contact type sheet connector of FIG. 1 in which a plurality of conductive thin wires 1 are arranged in the XY direction can be manufactured (see FIGS. 5, 6, and 7). At this time, the press-contacting connection surfaces, which are both surfaces of the sheet 7, are sliced surfaces, and both end surfaces 8 of each conductive thin wire 1 are always exposed. Therefore, work such as polishing work disclosed in Japanese Utility Model Laid-Open No. 3-97889 is performed. Can be omitted. Further, examples of the material for the electroless plating treatment include Au, Ni, solder, Ag, Cu, etc.
One kind or a combination of many kinds can be used.

According to the above, since the laminated body 32 is not formed by laminating a plurality of sheets 7, it is possible to realize a fine array without any need for the adhesive layer 31.
In addition, since it is not manufactured individually, it is possible to improve productivity. As a result, it is possible to easily and satisfactorily connect between the connection terminals 11 and 21 that are miniaturized to have a connection terminal pitch of 0.2 mm / connection terminal size □ 0.1 mm or less.

The degree of vacuum between the plurality of conductive thin wires 1 is 0.
Liquid insulating material 5 after decompression environment 4 of about 50 kPa
Since filling is performed, the ease of the filling work can be greatly expected. Particularly, an excellent effect can be obtained by setting the reduced pressure environment 4 of 50 kPa between the plurality of conductive thin wires 1. Furthermore, since both end surfaces 8 of the conductive thin wire 1 are subjected to electroless plating, it is possible to effectively prevent and prevent corrosion and deterioration of the conductive thin wire 1, and to project the conductive thin wire 1 from the press-contact connection surface of the sheet 7. As a result, the connection characteristics can be remarkably improved.

[0019]

Embodiments of the pressure contact type sheet connector and the method for manufacturing the same according to the present invention will be described below. First, a plurality of conductive thin wires 1 were prepared, and the surface of the plurality of conductive thin wires 1 was covered with an insulating coat 2 with an enamel having a thickness of 1 μm. The number of the conductive thin wires 1 was about 2 million, and the conductive thin wires 1 were tungsten wires having a length of 50 mm and a diameter of 20 μm.

Next, a plurality of conductive thin wires 1 are bundled and inserted in parallel in a box-shaped mold 3 (see FIGS. 8, 9 and 10), and the inside of the mold 3 is decompressed to an environment 4 of 25 kPa.
(See FIG. 11), and liquid silicone rubber for LIM between a plurality of conductive thin wires 1 [Product name K manufactured by Shin-Etsu Chemical Co., Ltd.
E1990-60] is filled with the liquid insulating material 5 (see FIG. 12).
Then, the liquid insulating material 5 was heated and cured under the condition of 150 ° C./1 h to form the block body 6 (see FIG. 13).
The mold 3 had a size of width 30 mm × length 50 mm × depth 30 mm. Then, the block body 6 was thinly cut in a direction orthogonal to the conductive thin wire 1 to a thickness of 1 mm to form 50 sheets 7 to produce a pressure contact type sheet connector (FIG. 13).
reference). This pressure contact type sheet connector has an outer shape of 30 mm ×
The size is 30 mm and the thickness is 1 mm, and about 2,500 conductive thin wires 1 are included within 1 mm.

The pressure contact type sheet connector thus obtained is used for connecting terminals 11 and 21 of the inspection board 10 and the semiconductor chip 20.
The semiconductor chip 2 is interposed between the semiconductor chip 2 and the inspection substrate 10.
When 0 was pressed and compressed, the inspection substrate 10 and the semiconductor chip 20 could be electrically conducted. The semiconductor chip 20 has an outer size of 6 × 6, and a plurality of connecting terminals 21 are arranged in a grid pattern with a pitch of 0.2 mm × 25 pieces × 25 pieces, and each connecting terminal 21 is □ 0.1 m.
It is formed in a plane shape of m. Further, the plurality of connection terminals 11 of the inspection board 10 are arranged corresponding to the plurality of connection terminals 21 of the semiconductor chip 20. A pair of connection terminals 1 facing each other when the inspection board 10 and the semiconductor chip 20 are electrically connected to each other.
About 25 conductive thin wires 1 were contacted between 1 and 21, and a stable electrical connection could be obtained.

According to the above structure, the connection terminal pitch is 0.2.
mm / connection terminal size □ Since approximately 25 conductive thin wires 1 intervene in contact between the connection terminals 11 and 21 that are miniaturized to 0.1 mm or less, a really stable electrical connection can be obtained. Further, if the block body 6 is thinly cut to a thickness of 1 mm, 50 sheets 7 can be formed, so that the pressure contact type sheet connector can be manufactured inexpensively and in large quantities.

[0023]

As described above, according to the present invention, it is possible to easily and satisfactorily connect between connection terminals that are miniaturized to have a connection terminal pitch of 0.2 mm / connection terminal size □ 0.1 mm or less. There is. In addition, the pressure contact type sheet connector having such a configuration can be manufactured inexpensively and in large quantities.

[Brief description of drawings]

FIG. 1 is a cross-sectional explanatory view showing a usage state in an embodiment of a pressure contact type sheet connector according to the present invention.

FIG. 2 is a perspective view showing a conductive thin wire in the embodiment of the pressure contact type sheet connector and the manufacturing method thereof according to the present invention.

FIG. 3 is a perspective view showing a state in which a plurality of conductive thin wires are bundled in the embodiment of the method for manufacturing the pressure contact type sheet connector according to the invention.

FIG. 4 is a perspective view showing a state in which a plurality of conductive thin wires are bundled and inserted into a mold and pressure is reduced between the plurality of conductive thin wires in the embodiment of the method for manufacturing the pressure contact type sheet connector according to the invention. .

FIG. 5 is a perspective view showing a state in which a block body is cut in a direction orthogonal to the conductive thin wires to form a sheet in the embodiment of the method for manufacturing the pressure contact type sheet connector according to the invention.

FIG. 6 is an enlarged cross-sectional explanatory view of a main part showing the block body and the conductive thin wire in the embodiment of the method for manufacturing the pressure contact type sheet connector according to the invention.

FIG. 7 is a perspective view showing a pressure contact type sheet connector manufactured in an embodiment of a method for manufacturing a pressure contact type sheet connector according to the present invention.

FIG. 8 is a perspective view showing a state in which a conductive thin wire is inserted into a mold in the embodiment of the pressure contact type sheet connector and the manufacturing method thereof according to the present invention.

FIG. 9 is a perspective view showing a state in which a plurality of conductive thin wires are bundled and inserted into a mold in the embodiment of the pressure contact type sheet connector and the manufacturing method thereof according to the present invention.

10 is a partial cross-sectional perspective view of FIG.

FIG. 11 is a perspective view showing a state in which a liquid insulating material is filled between a plurality of conductive thin wires in the embodiment of the method for manufacturing the pressure contact type sheet connector according to the invention.

FIG. 12 is a perspective view showing a state where a liquid insulating material is filled between a plurality of conductive thin wires in the embodiment of the method for manufacturing the pressure contact type sheet connector according to the invention.

FIG. 13 is a perspective view showing a state in which a block body is cut in a direction orthogonal to a conductive thin wire to form a sheet in the embodiment of the method for manufacturing the pressure contact type sheet connector according to the invention.

FIG. 14 is a perspective view showing a method for manufacturing a conventional pressure contact type sheet connector disclosed in Japanese Patent Laid-Open No. 6-251848.

FIG. 15 is a perspective view showing a method for manufacturing a conventional pressure contact type sheet connector disclosed in JP-A-10-22033.

FIG. 16 is a perspective view showing a method for manufacturing a conventional pressure contact type sheet connector disclosed in Japanese Utility Model Laid-Open No. 3-97899.

[Explanation of symbols]

1 Conductive wire 2 Insulation coat 3 mold 4 decompression environment 5 Liquid insulation 6 blocks 7 sheets 8 both ends 10 inspection board 11 connection terminals 20 semiconductor chips 21 Connection terminal

Claims (3)

[Claims] 1. A pressure contact type sheet connector for electrically connecting between connection terminals, wherein an insulating sheet interposed between the connection terminals and a peripheral surface of the sheet are insulation-coated and supported by the sheet, and the connection is made. A plurality of conductive thin wires that come into contact with the terminals.
A pressure contact type sheet connector characterized in that at least 4 pieces are connected in the case of 2 mm / connection terminal size □ 0.1 mm. 2. A method of manufacturing a pressure-contact type sheet connector which electrically connects between connection terminals, wherein a plurality of conductive thin wires having an insulating coating on the peripheral surface are bundled to form an environment having a vacuum degree of 0 to 50 kPa. An uncured liquid insulating material having a viscosity of 5,000 P or less is filled between the plurality of conductive thin wires, and the liquid insulating material is cured to form a block body, and the block body is substantially orthogonal to the conductive thin wires. A method for manufacturing a pressure-contact type sheet connector, which comprises cutting the conductive thin wires by exposing the ends of the conductive thin wires. 3. The conductive thin wire for each connection terminal, connection terminal pitch 0.2 mm / connection terminal size □ 0.1 mm
In the case of the above, the method for manufacturing the press contact type sheet connector according to claim 2, wherein four or more are connected.