US Patent Issued to DOWA Electronics Materials on Sept. 30 for "Semiconductor optical device and method of producing the same" (Japanese Inventors)

ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,433,066, issued on Sept. 30, was assigned to DOWA Electronics Materials Co. Ltd. (Tokyo).

"Semiconductor optical device and method of producing the same" was invented by Yoshitaka Kadowaki (Akita, Japan) and Osamu Tanaka (Akita, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a method of producing a semiconductor optical device that makes it possible to improve the optical device properties of the semiconductor optical device including semiconductor layers containing at least In, As, and Sb. The method has a first step of forming an etching stop layer on an InAs growth substrate; a second step of forming a semiconductor laminate; a thi...