Patent ID: 7824964

Claim:
A method for fabricating package structures for optoelectronic devices, comprising: reversely placing a device wafer on a first substrate, wherein the device wafer comprises: a second substrate; and a first dielectric layer between the first and second substrates, comprising at least one pair of pads formed in the first dielectric layer; forming a first opening in the second substrate and the first dielectric layer to expose the surface and sidewall of the pair of pads; forming a metal layer directly on the exposed surface of each pad and covering the second substrate; forming a protective layer on the metal layer and filling the first opening in the first dielectric layer; forming at least one second opening in the protective layer, corresponding to each pad and exposing a portion of the metal layer on the second substrate; forming a solder ball in the second opening, electrically connecting to the metal layer; and dicing the device wafer and the first substrate along the first opening in the first dielectric layer.