Anisotropic conductive sheet, anisotropic conductive sheet manufacturing method, electrical inspection device, and electrical inspection method

A method for producing an anisotropic conductive sheet, the method comprising:

• 1) preparing a plurality of units each including an insulation layer, a plurality of conductive lines disposed on or above a surface of the insulation layer, and an adhesive layer covering at least part of peripheries of the plurality of conductive lines, the adhesive layer containing a silane coupling agent composition and/or a polycondensate thereof;
• 2) stacking and integrating the plurality of units to obtain a laminate;
• and
• 3) cutting the laminate in a cutting direction along a stacking direction of the laminate to obtain an anisotropic conductive sheet, the cutting direction intersecting an extending direction of at least one of the plurality of conductive lines,
• wherein
• the silane coupling agent composition contains a silane coupling agent having at least one vinyl group and at least one hydrolyzable group, and
• the method satisfies any one of a) and b) below:
• a) the insulation layer contains an addition cross-linked product of a silicone rubber composition, the silicone rubber composition containing an organopolysiloxane having at least one SiH group, an organopolysiloxane having at least one vinyl group, and an addition reaction catalyst, and
• in the preparing, at least part of the at least one vinyl group in the adhesive layer is subjected to an addition reaction with at least part of the at least one SiH group in the insulation layer,
• b) the insulation layer contains a cross-linked product of a silicone rubber composition, the silicone rubber composition containing an organopolysiloxane having at least one SiCH3 group, and an organic peroxide curing agent, and
• in the preparing, at least part of the at least one vinyl group in the adhesive layer is subjected to a radical addition reaction with the at least part of the at least one SiCH3 group in the insulation layer.

An anisotropic conductive sheet, comprising:

• an insulation layer including a first surface located on one side in a thickness direction of the insulation layer, and a second surface located on another side in the thickness direction;
• a plurality of conductive paths disposed in the insulation layer so as to each extend in the thickness direction, each of the plurality of conductive paths being exposed to an outside of the first surface and an outside of the second surface;
• and
• a plurality of adhesive layers, at least part of each of the plurality of adhesive layers being disposed between a corresponding one of the plurality of conductive paths and the insulation layer,
• wherein
• the insulation layer contains an addition cross-linked product of a silicone rubber composition having at least one vinyl group,
• each of the plurality of adhesive layers includes a silane coupling agent composition and/or a polycondensate thereof, the silane coupling agent composition containing a silane coupling agent having at least one SiH group and at least one hydrolyzable group, and
• at least part of the at least one SiH group in each of the plurality of adhesive layers is bonded to at least part of the at least one vinyl group in the insulation layer by the addition reaction.

A method for producing an anisotropic conductive sheet, the method comprising:

• 1) preparing a plurality of units each including an insulation layer containing an addition cross-linked product of a silicone rubber composition having at least one vinyl group, a plurality of conductive lines disposed on or above a surface of the insulation layer, and an adhesive layer covering at least part of peripheries of the plurality of conductive lines, the adhesive layer containing a silane coupling agent composition and/or a polycondensate thereof;
• 2) stacking and integrating the plurality of units to obtain a laminate;
• and
• 3) cutting the laminate in a cutting direction along a stacking direction of the laminate to obtain an anisotropic conductive sheet, the cutting direction intersecting an extending direction of at least one of the plurality of conductive lines,
• wherein
• in the preparing,
• the silane coupling agent composition contains a silane coupling agent having at least one SiH group and at least one hydrolyzable group, and
• at least part of the at least one SiH group is subjected to the addition reaction with at least part of the at least one vinyl group in the insulation layer.