Patent ID: 7148463
Filing Date: 2006-12-12
Classification: H01L,Y02E,Y02P

Abstract:
1. A photodetector comprising a photoconversion structure, the photoconversion structure comprising: an indium gallium arsenide (lnGaAs) absorption layer, the lnGaAs absorption layer having a Group III sublattice indium concentration greater than 53 percent; a substrate; a p-type anode layer; a n-type cathode layer, wherein the lnGaAs absorption layer is disposed between the p-type anode layer and the n-type cathode layer; and an etch stop layer, wherein the photodetector includes a metamorphic buffer layer disposed between the photoconversion structure and the substrate, and wherein the etch stop layer is disposed between the n-type cathode layer and the metamorphic buffer layer.