Patent ID: 8058725
Filing Date: 2011-11-15
Classification: H01L

Abstract:
1. A package structure, comprising: a package substrate, having an upper surface and a lower surface, wherein the lower surface has a molding area and a pad area, the molding area has at least one window opening penetrating the upper surface and the lower surface, and the pad area is used to dispose at least one solder ball or at least one connecting pin, the package substrate comprising: a solder mask, covering the lower surface of the package substrate, and having at least one groove disposed between the molding area and the pad area; a chip, having an active surface, disposed on the package substrate, wherein the active surface contacts with the upper surface of the package substrate; and a molding compound, covering the molding area, but without covering the at least one groove disposed between the molding area and the pad area, wherein the at least one groove exposes an insulation layer of the package substrate or the at least one groove exposes a dummy trace located outside of the molding area.