Patent ID: 6791152
Filing Date: 2004-09-14
Classification: H01L

Abstract:
A photodetector device comprising:a doped semiconductor substrate having a first dopant type; a first intrinsic semiconductor material layer formed over said semiconductor substrate; a main reflector formed over said first intrinsic semiconductor material layer; a second intrinsic semiconductor material layer formed over said main reflector; an upper semiconductor material layer doped with a second dopant type, which is opposite to the first dopant type, said upper semiconductor material layer being formed over said second intrinsic semiconductor material layer; an upper electrode formed on and electrically connected to said upper semiconductor material layer; and a lower electrode electrically connected to said semiconductor substrate, wherein one of said first and second intrinsic semiconductor material layers is formed with a small thickness to absorb incident light, relative to the other of said first and second intrinsic semiconductor material layers, which is formed with a relatively large thickness.