WO2015182996A1

WO2015182996A1 - Connection connector and connection connector manufacturing method

Info

Publication number: WO2015182996A1
Application number: PCT/KR2015/005329
Authority: WO
Inventors: 정영배
Original assignee: 주식회사 아이에스시
Priority date: 2014-05-29
Filing date: 2015-05-28
Publication date: 2015-12-03
Also published as: TWI550980B; TW201611448A; KR101572139B1

Abstract

The present invention relates to a connection connector and a connection connector manufacturing method and, more specifically, to a connection connector and a manufacturing method therefor, and the connection connector arranged between a device to be inspected and an inspection device for which a mutual electrical connection is required and electrically connecting a terminal of the device to be inspected and a pad of the inspection device comprises: a connection sheet including a sheet member, which has a plurality of through-holes formed at every position corresponding to the terminal of the device to be inspected, has flexibility, and is made from an insulating material, and a conductive electrode coupled to the through-holes of the sheet member so as to protrude more than an upper side of the sheet member and a lower side of the sheet member; and an anisotropic sheet including conductive units arranged under the conductive electrode of the connection sheet and coming in contact with the conductive electrode so as to exhibit conductivity in a thickness direction, and an insulation unit for insulating the conductive units from each other while supporting the conductive units, wherein an edge of a part protruding more than the lower side of the sheet member in the conductive electrode of the connection sheet has a round shape.

Description

Connecting connector and manufacturing method of connecting connector

The present invention relates to a method for manufacturing a connector for connection and a connector for connection, and more particularly, to a method for manufacturing a connector for connection and a connector for connection in which an array of conductive particles is concentrated in a thickness direction.

In general, in order to test the electrical characteristics of the device under test, the electrical connection between the device under test and the test apparatus should be stable. Typically, a connector for connection is used as a device for connecting the device under test and the test device.

The role of the connector for connection is to connect the terminals of the device under test and the pad of the test apparatus with each other so that electrical signals can be exchanged in both directions. For this purpose, an anisotropic sheet or pogo pin is used as a connecting means used inside the connecting connector. The anisotropic sheet connects the conductive portion having elasticity with the terminal of the device under test, and the pogo pin has a spring provided therein to facilitate the connection between the device under test and the test device, and mechanical shock that may occur during connection. It can be used for most test sockets.

This anisotropic sheet is likely to break easily at the upper end of the conductive portion due to frequent contact with terminals of the device under test requiring electrical connection. That is, the conductive portion having a form in which a plurality of conductive particles are arranged in the soft silicone rubber may be easily broken due to frequent contact with the terminal of the device under test, which is made of a metal material, and thus disposed therein. The conductive particles may be separated from the conductive portion, which may inhibit the overall conductivity.

To solve this disadvantage, the anisotropically conductive connector device 10 is disclosed in Korean Patent Laid-Open No. 10-2006-0013429. As shown in FIG. 1, the anisotropically conductive connector device 10 includes a rectangular anisotropic conductive film 10A, a sheet-like connector 20 integrally provided on one surface of the anisotropic conductive film 10A, and an anisotropic conductive film. It is comprised by the support member 30 which is a rectangular plate shape which supports 10A. The anisotropic conductive film 10A in this anisotropically conductive connector device 10 insulates the plurality of columnar conductive path forming portions 11 extending in the thickness direction and the conductive path forming portions 11 from each other. It is comprised by the insulating part 14, and in this example, the electrically-conductive path forming part 11 is arrange | positioned by fixed pitch according to the grid point position. The anisotropic conductive film 10A is entirely formed of an insulating elastic polymer material, and the conductive path forming portion 11 is contained in a state in which the conductive particles P having magnetic properties are aligned in the thickness direction. . In contrast, the insulating portion 14 contains little or no conductive particles. In the illustrated example, one surface of the central portion of the anisotropic conductive film 10A is formed to protrude from the peripheral portion. An effective conductive path forming unit electrically connected to a connection target electrode, for example, an electrode under test in a circuit device to be inspected, formed in the center portion of the anisotropic conductive film 10A among the plurality of conductive path forming sections 11 ( 12). Moreover, the thing formed in the peripheral part in 10A of anisotropic conductive parts is the invalid conductive path formation part 13 which is not electrically connected to the connection object electrode. In addition, the effective conductive path forming unit 12 is disposed along a pattern corresponding to the pattern of the connection target electrode. On the other hand, the insulating portions 14 are integrally formed to surround the respective conductive path forming portions 11, whereby all the conductive path forming portions 11 are insulated from each other by the insulating portions 14. It is. In addition, the sheet-shaped connector 20 has a flexible insulating sheet 21, and a plurality of electrode structures 22 made of metal extending in the thickness direction of the insulating sheet 21 are connected to the insulating sheet 21. Along with the pattern corresponding to the pattern of a target electrode, it arrange | positions apart from each other in the surface direction of the said insulating sheet 21. FIG.

The manufacturing method for this anisotropically conductive connector device 10 is disclosed in Figs. Specifically, as shown in FIG. 2, the conductive particles P are filled in a state in which the conductive particles P are dispersed in the molding material layer 19 while the sheet-shaped connector 20 is disposed in the mold. Subsequently, the intensity distribution is performed by activating an electromagnet (not shown) disposed on the upper surface of the ferromagnetic substrate 51 in the upper mold 50 and the lower surface of the ferromagnetic substrate 56 in the lower mold 55. The parallel magnetic field having a large strength between the parallel magnetic field having the shape of the upper mold 50 and the ferromagnetic layer 52 of the lower mold 55 corresponding to the thickness of the molding material layer 19 is obtained. Act in the direction. As a result, in the molding material layer 19, the conductive particles dispersed in the molding material layer 19, as shown in Fig. 3, the ferromagnetic layer 52 of each of the upper mold 50 and the lower portion corresponding thereto. The conductive path forming portion 11 located between the ferromagnetic layer 57 of the mold 55 is assembled to be a portion to be formed, and is oriented so as to line up in the thickness direction of the molding material layer 19.

In this state, the molding material layer 19 is cured to thereby form the conductive path forming portion 11 and the conductive paths that are densely packed in the state in which the conductive particles are aligned in the thickness direction in the elastic polymer material. An anisotropic conductive film 10A having an insulating portion 14 made of an insulating elastic polymer material with little or no conductive particles formed so as to surround the forming portion 11 has a sheet-shaped connector 20 on one surface thereof. Is integrally bonded, and the peripheral portion thereof is fixed to and supported by the support member 30.

In the anisotropically conductive connector device according to the related art, when the magnetic field is applied while the sheet-type connector is placed in a mold, the electrode structure also functions as a ferromagnetic material to affect the arrangement of the conductive particles when the electrode structure is made of nickel material. Get mad. At this time, since the lower surface of the electrode structure is flat, there is a problem that the arrangement of the conductive particles is not easy.

That is, in the case where the spacing between the electrode structures is large, there is no problem, but in order to manufacture a product having a narrow pitch between the conductive particles, the conductive particles should have a substantially cylindrical shape in the thickness direction. Since the magnetic force passing in the up and down direction is difficult to collect, as shown in FIG. 4, the bridge 11 'connecting the conductive path forming portions 11 between the conductive path forming portions 11; conductive particles May be formed to be separated from the row and connected to adjacent conductive path forming portions.

In this way, when the bridge 11 'is generated, it is a major cause of deterioration in reliability of electrical inspection.

The present invention relates to a connector for connection and a method for manufacturing the connector for minimizing the occurrence of a bridge connecting the adjacent conductive parts to each other in the manufacturing process.

The connecting connector of the present invention for solving the above-described problems is a connection disposed between the device under test and the test apparatus that requires mutual electrical connection to electrically connect the terminal of the device under test to the pad of the test apparatus. In the connector for a plurality of through-holes are formed at positions corresponding to the terminals of the device under test, the sheet member is made of flexible and insulating material, and is coupled to the through-hole of the sheet member, A connection sheet composed of a conductive electrode protruding from a lower surface of the sheet member; And an anisotropic sheet disposed under the conductive electrode of the connection sheet, the conductive portion being in contact with the conductive electrode and exhibiting conductivity in a thickness direction, and an insulating portion supporting the conductive portion and insulating the conductive portions from each other. In the conductive electrode of the connection sheet, the edge of the portion protruding from the lower surface of the sheet member has a round shape.

In the connecting connector, a portion of the conductive electrode protruding from the lower surface of the sheet member may be formed in a dome shape or a hemispherical shape as a whole.

In the connecting connector, nickel powder or nickel-diamond mixed powder may be plated bonded to the upper surface of the conductive electrode.

In the connector for connection, a plurality of bumps may be arranged in a circle shape on a top surface of the conductive electrode spaced apart from the center of the conductive electrode by a predetermined distance.

In the connector for connection, the portion of the conductive electrode protruding from the upper surface of the sheet member may form a dome shape.

In the connecting connector, a horizontal area of the portion protruding from the upper surface of the sheet member in the conductive portion may be larger than a horizontal area of the portion protruding from the lower surface of the sheet member in the conductive portion.

In the connection connector, the conductive portion may form a structure in which a plurality of conductive particles are arranged in the thickness direction in the elastic insulating material.

The method for manufacturing a connector for connection is a method for manufacturing a connector for connection, which is arranged between a device under test and an inspection device requiring electrical connection therebetween to electrically connect a terminal of the device under test to a pad of the device. In

A plurality of through holes are formed at positions corresponding to the terminals of the device under test, and a sheet member made of an insulating material having flexibility and a ferromagnetic material, and coupled to the through holes of the sheet member, the upper surface of the sheet member and the Providing a connection sheet protruding from the lower surface of the sheet member and comprising a conductive electrode having a round shape at an edge of the portion protruding from the lower surface of the sheet member;

A mold having a ferromagnetic layer formed at a position corresponding to the conductive electrode of the sheet member and a nonmagnetic layer formed at another portion thereof is prepared, and the connection sheet is disposed in the mold, and a liquid elasticity is formed inside the mold. Filling a liquid molding material in which conductive particles are distributed in the material; And

And applying a magnetic field in the mold in a vertical direction to align the conductive particles at a position corresponding to the conductive electrode and to cure the conductive particles.

In the manufacturing method of the connector for connection, the portion protruding from the lower surface of the sheet member in the conductive electrode may be made of a dome or hemispherical shape as a whole.

In the method for manufacturing the connecting connector, the conductive electrode may be made of at least one of iron, nickel, cobalt, and alloys thereof.

The connector for connection according to the present invention has the advantage that the lower edge of the conductive electrode of the connection sheet has a round shape to play a role of collecting magnetic force in the manufacturing process and thus minimize the formation of a bridge.

1 is an illustration of an anisotropically conductive connector device according to the prior art.

2 and 3 show a method for manufacturing an anisotropically conductive connector of the prior art.

4 is a view showing an example of an anisotropically conductive connector manufactured by the manufacturing method of FIGS. 2 and 3.

5 is a view showing a connector for connection according to an embodiment of the present invention.

6 to 8 show a method of manufacturing the connecting connector of FIG.

9 and 10 are views showing a connector for a connection according to another embodiment of the present invention.

11 is a view showing a connector for connection according to another embodiment of the present invention.

Hereinafter, a connection connector according to an embodiment of the present invention will be described in detail with reference to FIG. 5.

The connector 100 for a connection according to the embodiment of the present invention is disposed between the device under test 170 and the test device 180, which are required to be electrically connected to each other, and the terminal 171 of the device under test 170. ) And the pad 181 of the inspection device 180 is electrically connected.

The connector 100 for connection is comprised including the connection sheet 110 and the anisotropic sheet 140. FIG.

The connection sheet 110 is disposed on the upper surface side of the anisotropic sheet 140 to be in contact with the terminal 171 of the device under test 170. The connection sheet 110 includes a sheet member 120 and a conductive electrode 130.

The sheet member 120 includes a plurality of through holes 121 formed at positions corresponding to the terminals 171 of the device under test 170 and is made of an insulating material having flexibility. The material constituting the sheet member 120 is a thermosetting resin such as a polyimide resin or an epoxy resin, a polyester resin such as a polyethylene terephthalate resin, a polybutyrene terephthalate resin, a polyvinyl chloride resin, a polystyrene resin, or a polyacryl Although thermoplastic resins, such as a nitrile resin, a polyethylene resin, a polypropylene resin, an acrylic resin, a polybutadiene resin, a polyphenylene ether, a polyphenylene sulfide, polyamide, and polyoxymethylene, can be used, A polyimide resin is preferable.

In addition, the sheet member 120 is not limited thereto, and a mesh or a nonwoven fabric may be used, and specifically, a sheet member 120 may be suitably used. Examples of such organic fibers include fluororesin fibers such as polytetrafluoroethylene fibers, aramid fibers, polyethylene fibers, polyarylate fibers, nylon fibers, polyester fibers and the like.

Moreover, as an organic fiber, the linear thermal expansion coefficient is equal to or close to the linear thermal expansion coefficient of the material which forms a connection object member, Specifically, the linear thermal expansion coefficient is 30x10 <^-6> -5 * 10 <^-6> / K, In particular, by using 10 × 10 ^-6 to -3 × 10 ^-6 / K, thermal expansion of the anisotropic conductive film is suppressed, so that even when a thermal history is caused by temperature change, a good electrical connection state to the connection object member can be obtained. It can be kept stable.

The inner diameter of the through hole 121 formed in the sheet member 120 is preferably smaller than the maximum outer diameter of the conductive electrode 130. The through hole 121 may be formed by a laser, but is not limited thereto, and may be formed by machining such as drilling.

The conductive electrode 130 is coupled to the through hole 121 of the sheet member 120 to protrude from the upper surface of the sheet member 120 and the lower surface of the sheet member 120. The conductive electrode 130 has a flat upper surface and has a dome or hemispherical shape. In detail, the conductive electrode 130 includes an upper electrode 131 protruding upward from the sheet member 120, a lower electrode 132 protruding downward from the sheet member 120, and the upper electrode 131. ) And the lower electrode 132 and the connection electrode 133 inserted into the through hole 121. At this time, the upper electrode 131 is made of a substantially disk shape and the lower electrode 132 is made of a substantially dome or hemispherical shape.

The material constituting the conductive electrode 130 is composed of a ferromagnetic material having excellent conductivity, and specific examples thereof include iron, nickel, cobalt, or an alloy thereof. The conductive electrodes 130 are attached to the sheet member 120 by a number corresponding to the terminals 171 of the device under test 170, and the conductive electrodes 130 are spaced apart from each other.

Nickel powder 134 or a nickel-diamond mixed powder may be plated on the top surface of the conductive electrode 130. Specifically, only the nickel powder 134 may be formed on the upper surface of the conductive electrode 130, but a diamond powder is disposed together with the nickel powder to easily remove foreign substances on the electrode surface of the device under test 170. It is also possible.

Meanwhile, a portion of the conductive portion 141 which protrudes from the upper surface of the sheet member 120, that is, a portion of which the horizontal area of the upper electrode 131 protrudes from the lower surface of the sheet member 120 of the conductive portion 141. That is, it is larger than the horizontal area of the lower electrode 132.

The anisotropic sheet 140 is disposed under the conductive electrode 130 of the connection sheet 110, is in contact with the conductive electrode 130, and has a conductive portion 141 which exhibits conductivity in a thickness direction, and the conductive portion. It consists of an insulating part 142 which insulates the conductive part 141 from each other while supporting the 141.

At this time, the conductive portion 141 has a structure in which a plurality of conductive particles 1411 are arranged in the thickness direction in the elastic insulating material.

At this time, as the elastic insulating material constituting the conductive portion 141, a high molecular material having a crosslinked structure is preferable as the elastic polymer material. As the curable polymer material-forming material that can be used to obtain such an elastic polymer material, various materials can be used. Specific examples thereof include polybutadiene rubber, natural rubber, polyisoprene rubber, styrene-butadiene copolymer rubber, and acryl. Conjugated diene rubbers such as nitrile-butadiene copolymer rubbers and hydrogenated products thereof, block copolymer rubbers such as styrene-butadiene-diene block copolymer rubbers and styrene-isoprene block copolymers, and hydrogenated products thereof and chloroprene Rubber, urethane rubber, polyester rubber, epichlorohydrin rubber, silicone rubber, ethylene-propylene copolymer rubber, ethylene-propylene-diene copolymer rubber, and the like.

Among these, when weather resistance is required for the anisotropic sheet 140, it is preferable to use things other than conjugated diene rubber, and it is especially preferable to use a silicone rubber from a viewpoint of molding processability and electrical characteristics.

Since the said electroconductive particle 1411 can easily orientate the said particle | grains as the electroconductive particle 1411 by the method mentioned later, the electroconductive particle 1411 which has magnetic is used. Specific examples of such conductive particles 1411 include particles of metals having magnetic properties such as iron, cobalt, and nickel, particles of these alloys, particles containing these metals, or particles thereof as core particles. On the surface of the core particles, the surface of which is coated with a metal having good conductivity such as gold, silver, palladium, rhodium, or inorganic particles or polymer particles such as nonmagnetic metal particles or glass beads as core particles. The plating of electroconductive magnetic metals, such as nickel and cobalt, is mentioned.

In these, it is preferable to use nickel particle as a core particle and to give the gold plating with favorable electroconductivity to the surface.

The insulating part 142 insulates the conductive part 141 from each other while supporting the conductive part 141 and is elastically insulated in the conductive part 141 while being integrally connected to the conductive part 141. It may be made of the same material as the material, but is not limited thereto, and may be made of a material different from that of the conductive portion 141. For example, it is also possible to use a material having better elasticity than the elastic insulating material constituting the conductive portion 141.

A method of manufacturing the connector 100 for connection according to an embodiment of the present invention will be described with reference to FIGS. 6 to 8.

First, as shown in FIG. 6, a plurality of through holes 121 are formed at positions corresponding to the terminals 171 of the device under test 170, and the sheet member 120 is made of an insulating material with flexibility. , Made of a ferromagnetic material and coupled to the through hole 121 of the sheet member 120, protrudes from an upper surface of the sheet member 120 and a lower surface of the sheet member 120, and a lower surface of the sheet member 120. A connection sheet 110 composed of a conductive electrode 130 having a rounded edge at a protruding portion is provided.

Thereafter, as shown in FIG. 7, the ferromagnetic layer 1512 is disposed at each position corresponding to the conductive electrode 130 of the sheet member 120, and the non-magnetic layer 1513 is formed at the other portion. A 150 is prepared and the connection sheet 110 is disposed in the mold 150. At this time, the mold 150 is composed of an upper mold 151 and a lower mold 152, and in the upper mold 151, along the arrangement pattern corresponding to the pattern of the conductive electrode 130 on the surface of the ferromagnetic substrate 1511. A ferromagnetic layer 1512 is formed, and a nonmagnetic layer 1513 is formed at a portion other than the ferromagnetic layer 1512, and a molding surface is formed by the ferromagnetic layer 1512 and the nonmagnetic layer 1513. . In the lower die 152, ferromagnetic layers 1522 and nonmagnetic layers 1523 are formed on the surface of the ferromagnetic substrate 1521, respectively. In addition, the mold 150 is filled with the liquid molding material in which the conductive particles 1411 are distributed in the liquid elastic material.

Subsequently, as shown in FIG. 8, by applying a magnetic field in a mold in a vertical direction, the conductive particles 1411 are aligned at a position corresponding to the conductive electrode 130 and cured to complete the connection connector 100. Done.

The connector 100 for connection according to the embodiment of the present invention has a conductive electrode having a dome-shaped lower portion in the process of forming the conductive portion 141 by aligning the conductive particles 1411 in the thickness direction by applying a magnetic field. 130 serves to collect the magnetic force has the advantage of minimizing the occurrence of the bridge connecting the conductive portion 141.

Specifically, in the state in which the connection sheet 110 is inserted into the mold 150, the conductive electrode 130 of the connection sheet 110 forms conductive particles 1411 together with the ferromagnetic layer 1512 constituting the mold 150. It functions to arrange in the thickness direction, in this process, the lower shape of the conductive electrode 130 has a dome or hemispherical shape as a whole, and the conductive particles 1411 are densified as no separate angled edges exist. To be deployed.

In addition, in the present invention, since the upper cross-sectional area of the conductive electrode 130 is larger than the lower cross-sectional area of the conductive electrode 130, the terminal 171 of the device under test 170 can be easily contacted with the conductive electrode 130. There is this. For example, the device under test 170 is transported from a separate tray and comes into contact with the connector 100 for connection, compared to the conductive portion 141 which is always in contact. However, since the size of the conductive electrode 130 is large, there is an advantage that the device 170 to be reliably contacted with the conductive electrode 130 even if the device under test 170 is slightly out of position.

The connector for connection according to the present invention may be modified as follows.

In the above-described embodiment, the upper surface of the conductive electrode is illustrated that the nickel powder is plated bonded, but is not limited thereto. As illustrated in FIGS. 9 and 10, a plurality of bumps 135 may be disposed on the upper surface of the conductive electrode 130. It may be arranged in a circular shape spaced apart from the center of the conductive electrode 130 by a predetermined distance.

In addition, in the above-described embodiment, the upper portion of the conductive electrode 130 is illustrated as being flat, but is not limited thereto. As shown in FIG. 11, the conductive electrode 130 protrudes from the upper surface of the sheet member 120. It is also possible that the part is formed in a dome shape.

Although the present invention has been described with reference to various embodiments, the present invention is not limited thereto, and any thing that can be reasonably interpreted from the scope of the present invention will naturally belong to the scope of the present invention.

Claims

A connecting connector arranged between a device under test and an inspection device requiring electrical connection to electrically connect a terminal of the device under test to a pad of the test device.

A plurality of through holes are formed at positions corresponding to the terminals of the device under test, and a sheet member made of an insulating material with flexibility;

A connection sheet coupled to the through hole of the sheet member and configured to have a conductive electrode protruding from an upper surface of the sheet member and a lower surface of the sheet member; And

A conductive portion disposed under the conductive electrode of the connection sheet and in contact with the conductive electrode and exhibiting conductivity in a thickness direction;

Including an anisotropic sheet consisting of an insulating portion for supporting the conductive portion and insulating the conductive portions from each other,

And an edge of a portion of the conductive electrode of the connection sheet protruding from the lower surface of the sheet member has a round shape.
The method of claim 1,

The connector for protruding from the conductive electrode than the lower surface of the sheet member as a whole dome or hemispherical.
The method of claim 1,

Nickel powder or nickel-diamond mixed powder is plated-bonded on the upper surface of the conductive electrode.
The method of claim 1,

And a plurality of bumps arranged on the upper surface of the conductive electrode in a circle shape at a predetermined distance from the center of the conductive electrode.
The method according to claim 1 or 2,

The conductive electrode is a connector for connecting, characterized in that the portion protruding from the upper surface of the sheet member has a dome shape.
The method of claim 1,

And the horizontal area of the portion protruding from the upper surface of the sheet member in the conductive portion is larger than the horizontal area of the portion protruding from the lower surface of the sheet member in the conductive portion.
The method of claim 1,

And the conductive portion has a structure in which a plurality of conductive particles are arranged in a thickness direction in an elastic insulating material.
In the manufacturing method of the connector for connection which is arrange | positioned between the device under test and the test apparatus which mutually require electrical connection, and electrically connects the terminal of the device under test and the pad of the test apparatus.

A plurality of through holes are formed at positions corresponding to the terminals of the device under test, and a sheet member made of an insulating material having flexibility and a ferromagnetic material, and coupled to the through holes of the sheet member, the upper surface of the sheet member and the Providing a connection sheet protruding from the lower surface of the sheet member and comprising a conductive electrode having a round shape at an edge of the portion protruding from the lower surface of the sheet member;

A mold having a ferromagnetic layer formed at a position corresponding to the conductive electrode of the sheet member and a nonmagnetic layer formed at another portion thereof is prepared, and the connection sheet is disposed in the mold, and a liquid elasticity is formed inside the mold. Filling a liquid molding material in which conductive particles are distributed in the material; And

And applying the magnetic field in the mold in a vertical direction to align the conductive particles at a position corresponding to the conductive electrode and to cure the conductive particles. 2.
The method of claim 8,

A portion of the conductive electrode protruding from the lower surface of the sheet member is a manufacturing method for a connector for connection, characterized in that the overall dome or hemispherical shape.
The method of claim 8,

The conductive electrode is made of at least one of iron, nickel, cobalt and alloys thereof.