Patent ID: 6545289
Filing Date: 2003-04-08
Classification: B82Y,H01L,Y02E,Y10S

Abstract:
A quantum-well semiconductor device that senses radiation energy, comprising:a substrate; a first conductive contact layer formed over said substrate; a plurality of radiation-sensing pyramid regions formed over said first conductive contact layer, each having a plurality of quantum-well layers parallel formed over said first conductive contact layer and operating to absorb radiation by at least one intraband transition, wherein each radiation-sensing pyramid region has reflective surfaces slanted with respect to said substrate at about 45 degrees and formed by a pattern transfer process to be independent of semiconductor crystallographic planes to reflect incident radiation from the substrate to said quantum-well layers and one another and to prevent received radiation from entering another radiation-sensing pyramid region to blur received image; a plurality of non-radiation-sensing regions formed between said radiation-sensing regions; and a plurality of second contact layer regions respectively formed over said plurality of radiation-sensing regions.