Patent ID: 7544599
Filing Date: 2009-06-09
Classification: H01L,H05K,Y02P

Abstract:
1. A manufacturing method of a solder ball disposing surface structure of a package substrate comprising: providing a core board with a first metal layer and a second metal layer respectively formed on two opposite surfaces thereof; forming metal bumps on the second metal layer by electroplating; forming a third resist layer on the first metal layer and forming third openings in the third resist layer for exposing a part of the surface of a first metal layer, and forming a fourth resist layer on the second metal layer and the metal bumps and forming fourth openings in the fourth resist layer for exposing a part of a surface of the second metal layer and forming fifth openings in the fourth resist layer for exposing a part of surfaces of the metal bumps; removing the first and second metal layers in the third and fourth openings of the third and fourth resist layers so as to respectively form a first circuit layer, a second circuit layer and metal pads on the surfaces of the first and second metal layers of the core board, and removing the metal bumps in the fifth openings so as to form metal flanges disposed around the metal pads; removing the third and fourth resist layers; forming a first insulative protection layer on the core board and the first circuit layer and forming first openings in the first insulative protection layer for exposing a part of a surface of the first circuit layer as electrical connecting pads; and forming a second insulative protection layer on the core board, the second circuit layer and the metal pads, and forming second openings in the second insulative protection layer so as to expose a part of surfaces of the metal flanges.