Patent ID: 7972934

Claim:
A method of manufacturing a photodetector array comprising: providing a semiconductor base having first and second main surfaces opposite to each other, the semiconductor base being of a first conductivity and a first relative doping concentration; providing a semiconductor layer having first and second main surfaces opposite to each other and having a second relative doping concentration; bonding the second main surface of the semiconductor layer to the first main surface of the semiconductor base; forming at least one trench in the first main surface of the semiconductor layer, the at least one trench extending through the semiconductor layer and to a first depth position in the semiconductor base; forming a first dielectric layer on the sidewalls of the at least one trench; filling the at least one trench with a conductive material to form a via; selectively masking the first main surface with a first mask; and doping with a first dopant of a first conductivity the first main surface of the semiconductor layer to form a doped isolation region, the doped isolation region extending through the semiconductor layer to at least the first main surface of the semiconductor base, the doped isolation region having the first relative doping concentration.