Patents by Inventor Craig W. Kokjohn

Craig W. Kokjohn 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).

  • Photomask and method for qualifying the same with a prototype specification
    Patent number: 6910203
    Abstract: A photomask and method for qualifying the same with a prototype specification are disclosed. The method includes comparing a plurality of die sites formed in a patterned layer on a photomask with a prototype specification. If at least one of the die sites complies with the prototype specification, the photomask is selected for used in a semiconductor manufacturing process.
    Type: Grant
    Filed: December 9, 2002
    Date of Patent: June 21, 2005
    Assignee: Toppan Photomasks, Inc.
    Inventor: Craig W. Kokjohn
  • Photomask and method for qualifying the same with a prototype specification
    Publication number: 20030198873
    Abstract: A photomask and method for qualifying the same with a prototype specification are disclosed. The method includes comparing a plurality of die sites formed in a patterned layer on a photomask with a prototype specification. If at least one of the die sites complies with the prototype specification, the photomask is selected for used in a semiconductor manufacturing process.
    Type: Application
    Filed: December 9, 2002
    Publication date: October 23, 2003
    Applicant: DuPont Photomasks, Inc.
    Inventor: Craig W. Kokjohn