Patent ID: 7759703

Claim:
A photo-detector array IC for a laser-radar image signal, comprising: a plurality of photo-detection pixels, each including a photodiode for converting an incident light energy to an electric energy and a ROIC (read-out integrated circuit) including a first heterojection bipolar transistor for selecting electric energy of the photodiode in the row of the photodiode array and a second heterojection bipolar transistor for selecting the output of the electrical signals that are transmitted from the photo-detector in the column of the photodiode array; and metal interconnection lines being provided for electrical connection between an n-type electrode of the photodiode and an emitter electrode of the first heterojection bipolar transistor and between a collector electrode of the first heterojection bipolar transistor and an emitter electrode of the second heterojection bipolar transistor, wherein the photodiode, the first heterojection bipolar transistor, and the second heterojection bipolar transistor are integrated as a monolithic chip on an semi-insulating InP substrate wafer.