Patent ID: 7042018
Filing Date: 2006-05-09
Classification: H01L

Abstract:
1. A GaN LED structure, comprising: a substrate made of a material selected from the group consisting of sapphire, 6H—SiC, 4H—SiC, Si, ZnO, GaAs, MgAl a double buffer layer, located on top of said substrate, further comprising: a first buffer layer, made of Al of said substrate, and a second buffer layer, made of SiN, located on top of said first buffer layer; an n-type GaN layer, located on top of said double buffer layer; a short period superlattice contacting layer, located on top of said n-type GaN layer, further comprising: a plurality of foundation layers, located on top of said n-type GaN layer, each of said foundation layers further comprising: a first base layer, made of heavily silicon doped silicon n-type Al a second base layer, located on top of said first base layer, made of SiN; an active layer, made of InGaN, located on top of said short period superlattice digital contacting layer; a p-type shielding layer, made of Mg-doped Al a contacting layer, made of p-type Mg-doped Al