Patent ID: 7807066
Filing Date: 2010-10-05
Classification: H05K

Abstract:
1. A method of manufacturing a perforated porous resin substrate, the method including the following Steps 1 to 3: (1) Step 1 of forming at least one perforation penetrating in the thickness direction from a first surface to a second surface in a porous resin substrate made of a resin material containing a fluoropolymcr by machining or laser processing; (2) Step 2 of etching treatment conducted by putting an etchant containing an alkali metal in contact with a wall face of each perforation; and (3) Step 3 of putting an oxidizable compound or a solution thereof in contact with a degenerative layer generated by the etching treatment, and thereby removing the degenerative layer, such that in addition to the porous structure of the entire porous structure being maintained, the wall face of the perforation which has been made nonporous is made porous.