Patent ID: 8058091
Filing Date: 2011-11-15
Classification: H01L,Y02E,Y02P

Abstract:
1. A method of manufacturing a photodetector comprising: providing a semiconductor substrate having first and second main surfaces opposite to each other; forming at least one trench in the first main surface of the semiconductor substrate, the at least one trench extending through the semiconductor substrate and to the second main surface of the semiconductor substrate; selectively masking the first main surface with a first mask; doping the first main surface and sidewalls of the at least one trench with a first dopant of a first conductivity to form a first anode/cathode region; selectively masking the second main surface with a second mask; doping the second main surface with a second dopant of a second conductivity opposite to the first conductivity to form a second anode/cathode region; selectively masking the first main surface with a third mask; and doping the first main surface with a third dopant of the second conductivity to form an isolation region.