Patents by Inventor Masanari MURAYAMA

Masanari MURAYAMA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • SEMICONDUCTOR DEVICE AND MANUFACTURING METHOD OF SEMICONDUCTOR DEVICE
    Publication number: 20230275132
    Abstract: An insulating film is formed on a main surface of a semiconductor substrate constituting a semiconductor device so as to cover a field plate portion, a metal pattern thicker than the field plate portion is formed on the insulating film, and a protective film is formed on the insulating film so as to cover the metal pattern. The field plate portion is made of polycrystalline silicon, and the insulating film is composed of a stacked film of one or more silicon nitride films and one or more silicon oxide films.
    Type: Application
    Filed: December 7, 2022
    Publication date: August 31, 2023
    Inventors: Toshiaki IGARASHI, Sho NAKANISHI, Tomoaki UNO, Koshiro YANAI, Masanari MURAYAMA