Patent ID: 9461198
Filing Date: 2016-10-04
CPC Classification: H01L

Claim Text:
1. A method for fabricating an optical diode device configured to emit electromagnetic radiation in an ultraviolet range, the method comprising: providing a transparent substrate member having a growth surface and a backside surface; treating the backside surface to a polishing process to remove contaminants from the backside surface; subjecting the backside surface to a treatment process to cause the backside surface to be characterized by a roughness having a periodic spatial pattern overlying the backside surface; forming a thickness of metal on the backside surface, the plurality of periodic spatial patterns being selected from one of a plurality of stripe grids, a plurality of square grids, a checker board, or other regular spatial configurations; transferring the transparent substrate member into a reactor chamber for deposition of epitaxial materials; forming a buffer material overlying the growth surface while exposing the backside surface; processing the substrate at a temperature greater than 100 degrees to less than 1,500 degrees; and removing the thickness of metal to expose the backside surface including the roughness having the periodic spatial pattern.