Patents by Inventor Guy Henri Dumas

Guy Henri Dumas 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).

  • Method for diffusion of aluminium
    Patent number: 4038111
    Abstract: The invention relates to a method for diffusing aluminium into a substrate by painting. According to this method, aluminium isopropylate is dissolved in ethoxyethanol at the maximum solubility. This solution is uniformly coated onto a substrate and a diffusion is carried out by placing this coated substrate into an open furnace. This invention is for manufacturing high voltage semiconductor devices.
    Type: Grant
    Filed: July 14, 1975
    Date of Patent: July 26, 1977
    Assignee: Silec-Semi-Conducteurs
    Inventor: Guy Henri Dumas