Patent ID: 8471353
Filing Date: 2013-06-25
Classification: H01L

Abstract:
1. A mesa photodiode comprising: a stack structure that is provided on a semiconductor substrate, said stack structure being formed by stacking and growing a buffer layer comprising a semiconductor of a first conductivity type, an etching stopper layer comprising a semiconductor of the first conductivity type, a second conductivity type, or an undoped type, a light-absorbing layer comprising a semiconductor of the first conductivity type, the second conductivity type, or the undoped type, and a semiconductor layer of the second conductivity type in this order, said semiconductor layer of the second conductivity type and said light-absorbing layer forming a mesa, a side wall of said mesa and at least a shoulder portion of said mesa in an upper face of said mesa being continuously covered with a semiconductor layer of the first conductivity type, the second conductivity type, a semi-insulating type, or the undoped type that is grown on the side wall and the upper face of said mesa, said mesa being covered with a dielectric passivation film through said semiconductor layer, and a layer thickness D wherein said semiconductor layer contacts the side wall of said mesa and at least the shoulder portion of said mesa in the upper face of said mesa.