Method for manufacturing composite material to be plated and method for manufacturing anisotropic electroconductive sheet

Abstract

The present invention addresses the problem of providing a method for manufacturing a plated composite material, the method being capable of forming a plating layer having good adhesiveness to each of a plurality of resin parts each including a different resin. The method for manufacturing a plated composite material for solving the aforementioned problem includes: a step for preparing a composite material having a heat-resistant resin part and a silicone resin part; a step for treating, with an alkaline solution, a plating region of the composite material; a step for irradiating plasma on the plating region; a step for bringing the plating region in contact with a cationic catalyst-containing liquid; and a step for performing an electroless plating treatment on the plating region. The plating region includes at least a portion of the heat-resistant resin part and at least a portion of the silicone resin part.

1 . A method for producing a plated composite material, the method comprising:
 preparing a composite material that includes a heat-resistant resin part and a silicone resin part, the heat-resistant resin part containing a heat-resistant resin, the silicone resin part containing a silicone resin;   treating a plating target region of the composite material with an alkaline solution;   irradiating the plating target region with plasma, the plating target region having been treated with the alkaline solution;   bringing a cationic catalyst-containing liquid into contact with the plating target region having been irradiated with the plasma; and   performing electroless plating on the plating target region having been brought into contact with the catalyst-containing liquid,   wherein   the plating target region contains at least a portion of the heat-resistant resin part and at least a portion of the silicone resin part.   
     
     
         2 . The method for producing a plated composite material according to  claim 1 , wherein
 the plasma is oxygen plasma.   
     
     
         3 . The method for producing a plated composite material according to  claim 1 , wherein
 high frequency output of the plasma is 75 W to 150 W.   
     
     
         4 . The method for producing a plated composite material according to  claim 1 , wherein:
 in the composite material, the heat-resistant resin part and the silicone resin part are laminated in a thickness direction of the composite material;   the composite material further includes a through hole extending between a first surface located on one side in the thickness direction and a second surface located on another side in the thickness direction; and   the plating target region is an outer wall of the through hole.   
     
     
         5 . A method for producing an anisotropic conductive sheet, the method comprising:
 preparing an insulating sheet in which a heat-resistant resin layer containing a heat-resistant resin and a silicone resin layer containing a silicone resin are laminated in a thickness direction of the insulating sheet, the insulating sheet including a through hole extending between a first surface located on one side in the thickness direction and a second surface located on another side in the thickness direction;   treating an outer wall of the through hole of the insulating sheet with an alkaline solution;   irradiating the outer wall with plasma, the outer wall having been treated with the alkaline solution;   bringing a cationic catalyst-containing liquid into contact with the outer wall having been irradiated with the plasma; and   performing electroless plating on the outer wall having been brought into contact with the catalyst-containing liquid.