Patent ID: 6058229
Filing Date: 2000-05-02
Classification: G02B,H01L

Abstract:
A photogenerator for detecting light in the wavelength band 1480-1550 nm comprising a plurality of photodiodes, each of said photodiodes comprising:a. a substrate comprising InP, said substrate having a bottom surface and a top surface,b. a p-i-n diode formed on the top surface of said substrate said p-i-n diode comprising:i. a first III-V semiconductor layer on said substrate, said III-V semiconductor layer having a first conductivity type,ii. a second III-V semiconductor layer on said first III-V semiconductor layer, said second III-V semiconductor layer being essentially intrinsic,iii. a third III-V semiconductor layer on said second III-V semiconductor layer, said third III-V semiconductor layer having a conductivity type opposite to the conductivity type of said first III-V semiconductor layer,c. a metal layer covering essentially the entire p-type layer, said metal layer being at least 70% reflecting of a wavelength in said wavelength band,said plurality of photodiodes each having an area A.+-.25%, and said plurality of photodiodes being electrically connected in series.