EP0420690A2
Expired / Lapsed
EP
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Electric inspection unit using anisotropically electroconductive sheet and process for producing the anisotropically electroconductive sheet
Assignee: JSR Corp
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Filing: 1990-09-28
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Granted: —
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Expires: 2010-09-28
Abstract
Abstract An electric inspection unit comprising many inspection electrodes and an anisotropically electroconductive sheet which is placed so as to be present between the electrodes and a base board to be inserted into the unit when the base board is electrically inspected, characterized in that the anisotropically electroconductive sheet has a plurality of electroconductive portions extending in the direction of thickness of the sheet, which portions are arranged so as to be insulated from one another by insulating portions consisting of an insulating, elastic, high-molecular-weight substance, each of the electroconductive portions being formed in a portion projecting from the surface of the insulating portion by filling the insulating portion densely with electroconductive particles. The above anisotropically electroconductive sheet is produced by forming a layer of a molding material consisting of a mixture of electroconductive particles having magnetism and a high-molecular-weight substance in the cavity of a mold consisting of a pair of upper and lower molds, the molding surface of each of which is flat or has much smaller convexes or concaves than the height of the projection portions of the anisotropically electroconductive sheet to be produced, applying a magnetic field having an intensity distribution to the molding material layer in the direction of thickness of the layer in the state that a space is present between the molding surface of the upper mold and the upper surface of the molding material layer, to fluidize the molding material while transferring the electroconductive particles by magnetic force, thereby changing the exterior shape of the molding material layer and then curing the molding material layer.
Inventors
- 👤 Shinichi Suyama
- 👤 Yuiti Haruta
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 11:22
CPC Classifications
G; G01; G01R; G01R31/00; G01R1/00; G01R1/02; G01R1/06; G01R1/067; G01R1/073; G01R1/07307; G01R1/0735; G01R1/07342; H; H01; H01B; H01B1/00; H01B1/20; H01B1/22; H05; H05K; H05K3/00; H05K3/30; H05K3/32; H05K3/325
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
112 words
An electric inspection unit comprising many inspection electrodes and an anisotropically electroconductive sheet which is placed so as to be present between the electrodes and a base board to be inserted into the unit when the base board is electrically inspected, characterized in that the anisotropically electroconductive sheet has a plurality of electroconductive portions extending in the direction of thickness of the sheet, which portions are arranged so as to be insulated from one another by insulating portions consisting of an insulating, elastic, high-molecular-weight substance, each of the electroconductive portions being formed in a portion projecting from the surface of the insulating portion by filling the insulating portion densely with electroconductive particles.
Claim 2
Dependent Claim
112 words
An electric inspection unit comprising many inspection electrodes and an anisotropically electroconductive sheet which is placed so as to be present between the electrodes and a base board to be inserted into the unit when the base board is electrically inspected, characterized in that the anisotropically electroconductive sheet has a plurality of electroconductive portions extending in the direction of thickness of the sheet, which portions are arranged so as to be insulated from one another by insulating portions consisting of an insulating, elastic, high-molecular-weight substance, each of the electroconductive portions being formed in a portion projecting from the surface of the insulating portion by filling the insulating portion densely with electroconductive particles.
Claim 3
Dependent Claim
52 words
The electric inspection unit according to Claim 1, wherein the electroconductive particles are particles of a metal having magnetism or an alloy of the metals, those particles plated with gold, silver, palladium or rhodium or particles of a non-magnetic metal, an inorganic substance or a polymer plated with an electroconductive magnetic substance.
Claim 4
Dependent Claim
15 words
The electric inspection unit according to Claim 2, wherein the particles are plated with gold.
Claim 5
Dependent Claim
22 words
The electric inspection unit according to Claim 1, wherein the insulating, elastic, high-molecular-weight substance is a high-molecular-weight substance having a crosslinked structure.
Claim 6
Dependent Claim
25 words
The electric inspection unit according to Claim 4, wherein the high-molecular-weight substance having a crosslinked structure is a crosslinked product of a high polymer material.
Claim 7
Dependent Claim
38 words
The electric inspection unit according to Claim 5, wherein the high polymer material is silicone rubber, polybutadiene, natural rubber, polyisoprene, styrene-butadiene copolymer rubber, acrylonitrile-butadiene copolymer rubber, ethylene-propylene copolymer rubber, urethane rubber, polyester type rubber, chloroprene rubber or epichlorohydrin.
Claim 8
Dependent Claim
147 words
The electric inspection unit according to Claim 1, which comprises a pair of inspection heads, a pair of the anisotropically electroconductive sheets supported by a pair of carrier board perforated at positions corresponding to the projection portions of the anisotropically electroconductive sheet and a pair of off-glid adaptors, said inspection heads having pin-shaped inspection electrodes arranged at the positions corresponding to the electroconductive portions of the anisotropically electroconductive sheet, the pair of off-glids being placed at a space in the innermost position facing to each other, the pair of anisotropically electroconductive sheets being placed on the outside of the respective off-glids so that the projecting portions are contacted with the off-glids, the pair of inspection heads being placed on the outside of the respective anisotropically electroconductive sheets so that the pin-shaped electrodes can press the back side of the corresponding projecting portions of the anisotropically electroconductive sheet.
Claim 9
Dependent Claim
212 words
A process for producing an anisotropically electroconductive sheet having a plurality of electroconductive portions extending in the direction of thickness of the sheet, which portions are arranged so as to be insulated from one another by insulating portions consisting of an insulating, elastic, high-molecular-weight substance, each of the electroconductive portions being formed in a portion projecting from the surface of the insulating portion by filling the insulating portion densely with electroconductive particles, which process comprises forming a layer of a molding material consisting of a mixture of electroconductive particles having magnetism and a high-molecular-weight substance in the cavity of a mold consisting of a pair of upper and lower molds, the molding surface of each of which is flat or has much smaller convexes or concaves than the height of the projecting portions of the anisotropically electroconductive sheet to be produced, applying a magnetic field having an intensity distribution to the molding material layer in the direction of thickness of the layer in the state that a space is present between the molding surface of the upper mold and the molding material layer, to fluidize the molding material while transferring the electroconductive particles by magnetic force, thereby changing the exterior shape of the molding material layer and then curing the molding material.
Claim 10
Dependent Claim
212 words
A process for producing an anisotropically electroconductive sheet having a plurality of electroconductive portions extending in the direction of thickness of the sheet, which portions are arranged so as to be insulated from one another by insulating portions consisting of an insulating, elastic, high-molecular-weight substance, each of the electroconductive portions being formed in a portion projecting from the surface of the insulating portion by filling the insulating portion densely with electroconductive particles, which process comprises forming a layer of a molding material consisting of a mixture of electroconductive particles having magnetism and a high-molecular-weight substance in the cavity of a mold consisting of a pair of upper and lower molds, the molding surface of each of which is flat or has much smaller convexes or concaves than the height of the projecting portions of the anisotropically electroconductive sheet to be produced, applying a magnetic field having an intensity distribution to the molding material layer in the direction of thickness of the layer in the state that a space is present between the molding surface of the upper mold and the molding material layer, to fluidize the molding material while transferring the electroconductive particles by magnetic force, thereby changing the exterior shape of the molding material layer and then curing the molding material.
Claim 11
Dependent Claim
19 words
The process according to Claim 8, wherein the thickness of the molding material sheet is 0.1 to 3 mm.
Claim 12
Dependent Claim
35 words
The process according to Claim 9, wherein the space between the molding surface of the upper mold and the molding surface of the lower mold is larger than the thickness of the molding material layer.
Claim 13
Dependent Claim
13 words
The process according to Claim 8, wherein the curing is effected by crosslinking.
Claim 14
Dependent Claim
50 words
The process according to Claim 8, wherein the upper mold or both the upper and lower molds have such a construction that a base plate consisting of a ferromagnetic substance has a layer consisting of ferromagnetic substance portions and non-magnetic portions which are arranged in the form of a mosaic.
Claim 15
Dependent Claim
27 words
The process according to Claim 12, wherein the ferromagnetic substance is iron or nickel and the non-magnetic substance is a non-magnetic metal, a heat-resistant resin or air.
Claim 16
Dependent Claim
17 words
The process according to Claim 12, wherein the layer has a thickness of 0.1 to 1 mm.
References Cited (Backward Citations)
No citation records indexed.
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