Patent ID: 6632694
Filing Date: 2003-10-14
Classification: B82Y,H01L,H01S

Abstract:
A method of making a double heterojunction light emitting semiconductor device, comprising the steps of:providing an n-type semiconductor cladding layer selected from a group consisting of SiC, 3Câ€”SiC, 4Hâ€”SiC, 6Hâ€”SiC and diamond; said n-type cladding layer having an outer surface and a first generally flat surface; providing a plurality of quantum dots on said first generally flat surface; said quantum dots being formed of one or more indirect band gap materials selected from a group consisting of Si, Ge, SiGe, SiGeC, 3Câ€”SiC, and hexagonal SiC, each of said quantum dots having a thickness measured generally perpendicular to said first generally flat surface that is no greater than about 250 Angstroms, and said plurality of quantum dots defining a second generally flat surface that is spaced from and generally parallel to said first generally flat surface; processing said second generally flat surface to produce surface-characteristics that are compatible with direct-wafer-bonding; providing a p-type semiconductor cladding layer selected from a group consisting of SiC, 3Câ€”SiC, 4Hâ€”SiC, 6Hâ€”SiC and diamond; said p-type cladding layer having an outer surface and having a third generally flat surface; processing said third generally flat surface to produce a surface-characteristic that is compatible with direct-wafer-bonding; direct-wafer-bonding said second generally flat surface to said third generally flat surface; providing a first metal contact on said outer surface of said n-type cladding layer; and providing a second metal contact on said outer surface of said p-type cladding layer.