Patent ID: 8981534
Filing Date: 2015-03-17
Classification: B82Y,H01L,H01S

Abstract:
1. A device, comprising: a substrate having a first surface and a second surface opposite the first surface, the substrate consisting of a silicon substrate, wherein the substrate contains a plurality of recesses that extend from the second surface toward the first surface, and wherein the plurality of recesses are arranged so that the second surface of the substrate has a predefined pattern from a top view; a lattice-buffer layer formed on the first surface of the substrate, the lattice-buffer layer containing a material that reduces a lattice mismatch between a III-V group compound material and the silicon substrate or the silicon carbide substrate; and a III-V group compound layer formed over the lattice-buffer layer, wherein the III-V group compound layer and the lattice-buffer layer have different material compositions.