Patent ID: 7333684

Claim:
A stack-integrated optical transceiver, by using a stack-integration package structure of a light emitting device and a photodetector for high speed, full duplex optical fiber communication, comprising: a photodetector, has on its upper surface an isolated U-shaped cavity that is conformal-coated first with an electrically insulating layer and then with an optically reflective and electrically conducting metal layer; a light emitting device, stacked at the bottom inside the U-shaped cavity using conventional die bonding process to form with the photodetector a hybrid chip of stack-integrated embodiment; the conformal coated conducting metal layer, serves multiple purposes at once; providing for electrical interconnection from the bottom of the U-shaped cavity to a wire-bonding pad on the photodetector surface and form a reflective cavity metal surface for preventing direct optical crosstalk from the light emitter to the detector and optimally reflects light from the emitter in the desired direction; said reflective cavity metal surface also provides a larger effective light emitting area and facilitates optical coupling to the connected fiber.