Patents by Inventor Marcel Dissel

Marcel Dissel 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 of manufacturing a device and group of masks for this method
    Patent number: 5286584
    Abstract: A method and group of masks for manufacturing a device whereby illumination of a photoresist layer (4) takes place by subsequent illumination through partial masks (1) and 2). During these separate illuminations, complementary scales of grey are obtained in the connection region (7, 8) of the images (5, 6), the total illumination in the connection region (7, 8) being nevertheless complete. According to the invention, good results are obtained when the partial masks (1) and (2) have complementary transparency gradients in the ends (9, 10) corresponding to the scales of grey.
    Type: Grant
    Filed: October 26, 1992
    Date of Patent: February 15, 1994
    Assignee: U.S. Philips Corporation
    Inventors: Jan W. Gemmink, Wilhelmus H. M. Geerts, Marcel Dissel