Patent ID: 7229846

Claim:
A method of packaging a semiconductor package having an optical device, comprising: (a) providing a wafer having an active surface and a back surface, wherein the active surface has at least one upper pad and an optical device electrically connected to the upper pad; (b) forming at least one hole on the active surface of the wafer; (c) forming an insulating layer on a wall of the hole; (d) forming an upper metal layer on the active surface of the wafer, wherein the hole is filled with the upper metal layer; (e) patterning the upper metal layer to form an upper metal redistribution layer for electrically connecting the upper pad to the metal in the hole; (f) attaching a transparent insulating layer on the active surface of the wafer; (g) removing a part of the back surface of the wafer for exposing the metal in the hole outside the back surface of the wafer; (h) forming a lower metal redistribution layer on the back surface of the wafer, the lower metal redistribution layer being electrically connected to the metal in the hole; and (i) sawing the wafer to form a plurality of individual semiconductor packages.