Patents by Inventor Basil Coleman

Basil Coleman 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).

  • Patent number: 4729971
    Abstract: A dice separation technique involves producing a depressed street pattern (14) on the front device processing major surface of a wafer (11) before thinning the wafer down to a desired thickness. After mounting the wafer (11) on a suitable carrier, it is thinned down and selectively metallized to from backside contacts. Semiconductor material is removed from the central regions of the streets (14). Exposed material damaged by the material removal is also removed to eliminate micro-cracking while producing dice (12 and 13) having straight and smooth orthogonal edges. The present technique is particularly suitable for working with brittle compound semiconductor material between die areas having FETs or MMICs embedded therein.
    Type: Grant
    Filed: March 31, 1987
    Date of Patent: March 8, 1988
    Assignee: Microwave Semiconductor Corporation
    Inventor: Basil Coleman