Patent ID: 6870207
Filing Date: 2005-03-22
Classification: B82Y,H01L,Y02E

Abstract:
1. A semiconductor imaging device, comprising: a) a semiinsulating gallium arsenide (GaAs) substrate; b) a distributed Bragg reflector mirror epitaxially grown on said semiinsulating GaAs substrate; c) a first layer of P+ type GaAs deposited on said distributed Bragg reflector mirror for contacting a collector electrode; d) at least one layer of aluminum gallium arsenide (AlGaAs) disposed on said first layer of P+ type GaAs; e) an epitaxial layer structure of at least one quantum well of InGaAs having GaAs layers on each either side; f) a first spacer layer of AlGaAs disposed on said epitaxial layer structure; g) an N type modulation doped layer of AlGaAs disposed on said first spacer layer; h) a second spacer layer of AlGaAs disposed on said modulation doped layer; i) a planar doped layer of P+ type AlGaAs disposed on said second spacer layer; j) a cladding layer of AlGaAs of modest P type doping disposed on said planar doped layer; and k) a layer of GaAs of P++ type doping disposed on said cladding layer for contacting a gate electrode,