Patents by Inventor Hisaharu Miwa

Hisaharu Miwa 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 and system for compaction-processing mask pattern data of a semiconductor integrated circuit device
    Patent number: 5079717
    Abstract: A method for producing a mask pattern for a semiconductor integrated circuit includes dividing the mask pattern data into a plurality of lower level cells and an upper level cell having wiring lines for providing connections between the lower level cells, extracting inter-cell connection information from the mask pattern data, changing the dimensions of the lower level cells by predetermined ratios to conform to a design standard, and changing the wiring lines of the upper level cell to retain the connection between the lower level cells in accordance with the inter-cell connection information extracted.
    Type: Grant
    Filed: January 18, 1989
    Date of Patent: January 7, 1992
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Hisaharu Miwa