US Patent Issued to DENSO, TOYOTA JIDOSHA, MIRISE Technologies on March 18 for "Method for manufacturing switching device" (Japanese Inventors)

ALEXANDRIA, Va., March 19 -- United States Patent no. 12,255,243, issued on March 18, was assigned to DENSO Corp. (Kariya, Japan), TOYOTA JIDOSHA K.K. (Toyota, Japan) and MIRISE Technologies Corp. (Nisshin, Japan).

"Method for manufacturing switching device" was invented by Eiji Kagoshima (Nisshin, Japan) and Yohei Iwahashi (Nisshin, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for manufacturing a switching device includes: forming a trench at a top surface of a semiconductor substrate; forming a gate insulation film for covering an inner surface of the trench; forming a gate electrode inside the trench to locate a top surface of the gate electrode below the top surface of the semiconductor ...