Patent ID: 7571540
Filing Date: 2009-08-11
Classification: H05K,Y10T

Abstract:
1. A method of producing a suspension board with circuit, comprising: preparing a metal supporting board; forming on the metal supporting board an insulating base layer having a base opening portion from which the metal supporting board is exposed; forming on the insulating base layer a conductive pattern comprising a ground wire; forming on the insulating base layer an insulating cover layer covering the conductive pattern and having a first cover opening portion in said insulating cover layer from which a part of the ground wire is exposed, and a second cover opening portion in said insulating cover layer from which the base opening portion is exposed together with a part of the ground wire; forming an electrolytic plating layer on a surface of the ground wire exposed from the first cover opening portion and on a surface of the ground wire exposed from the second cover opening portion, by feeding electric power from the ground wire; and after forming the electrolytic plating layer, then forming a metal filling in the base opening portion so as to electrically connect the ground wire and the metal supporting board.