Patent ID: 6284353
Filing Date: 2001-09-04
Classification: H01L,H05K,Y10S,Y10T

Abstract:
A printed wiring board having an insulating substrate constructed by one, two or more insulating layers, a pad for external connection arranged in an outermost layer of the insulating substrate, a conductor pattern arranged in another layer different from said outermost layer, and a hole for conductivity for electrically connecting said pad for external connection and said conductor pattern;the printed wiring board being characterized in that said pad for external connection closes an opening portion of the hole for conductivity on its outermost layer side and forms a bottom portion of the hole for conductivity;a metal film covering a surface of an external connection side of said pad;a metallic plating film for continuously covering an inner wall and the bottom portion of the hole for conductivity is formed within said hole for conductivity; anda thermosetting resin at least partially filling an inside portion of said metallic plating film.