Patent ID: 6943100
Filing Date: 2005-09-13
Classification: H01L,H05K,Y02P,Y10T

Abstract:
1. A process for the production of a wiring board, comprising the steps of: defining an opening at a predetermined position of a film-like insulating substrate; forming a conductive thin film on a first principal surface of said insulating substrate; etching said conductive thin film to form an electric wiring provided with a connection terminal covering said opening; forming, in said opening, a conductive member that is connected to said connection terminal; and forming sequentially a thin film layer made of nickel (Ni) and a thin film layer made of gold (Au) on the surfaces of said conductive member, wherein said conductive member does not protrude from a second principal surface of said insulating substrate opposed to said first principal surface and has a thickness thinner than that of said insulating substrate, and said thin film layer made of gold does not protrude from said second principal surface.