Patent ID: 7585699
Filing Date: 2009-09-08
Classification: H01L,H05K

Abstract:
1. A method for manufacturing a semiconductor package board, comprising: forming a plurality of first metal pads on a first surface and on a second surface of a metal base plate; forming a multilayer wiring film including a plurality of insulating layers and a plurality of wiring layers on said first surface and on said second surface of said metal base plate, said multilayer wiring film having a plurality of second metal pads on a top surface thereof, said plurality of second metal pads being electrically connected to respective said first metal pads through said wiring layers; separating said metal base plate into a first piece having said first surface and a second piece having said second surface; and etching said metal base plate from at least one of said first piece and said second piece to expose said first metal pads; wherein said metal base plate is made from a metal selected from the group consisting of stainless steel, iron, nickel, copper, and aluminum or an alloy thereof.