Patent ID: 7152318
Filing Date: 2006-12-26
Classification: H05K,Y10T

Abstract:
1. A method for manufacturing a built-up printed circuit board with stack type via-holes, comprising the steps of: (a) forming a first via-hole through a first copper layer of a first laminated copper sheet by means of a laser drill to expose a second copper layer of the first laminated copper sheet; (b) forming a first plated layer on the first via-hole and on the first laminated copper sheet; (c) filling the first plated via-hole with a via-hole filling material; (d) grinding the top surface of the first via-hole filled with the via-hole filling material to level the first via-hole; (e) forming a second plated layer on the first filled via-hole and the first plated layer to cover the first filled via-hole; and (f) disposing a second laminated copper sheet on the second plated layer, and repeating the steps (a) to (e) to form a second via-hole.