Patents by Inventor Richard Stack

Richard Stack 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).

  • Clover-leaf solder mask opening
    Patent number: 6150061
    Abstract: A solder mask having a clover-leaf shaped opening around a PTH for enhanced performance. The solder mask resides on a surface of a printed circuit board comprising lands and PTH's. The opening around the PTH is configured to maintain a minimum channel width between the PTH and an adjacent land while maximizing the opening around the PTH, thereby decreasing the likelihood that the solder mask material will be inadvertently drawn into the PTH.
    Type: Grant
    Filed: January 17, 2000
    Date of Patent: November 21, 2000
    Assignee: International Business Machines Corporation
    Inventor: James Richard Stack
  • Clover-leaf solder mask opening
    Patent number: 6078013
    Abstract: A solder mask having a clover-leaf shaped opening around a PTH for enhanced performance. The solder mask resides on a surface of a printed circuit board comprising lands and PTH's. The opening around the PTH is configured to maintain a minimum channel width between the PTH and an adjacent land while maximizing the opening around the PTH, thereby decreasing the likelihood that the solder mask material will be inadvertently drawn into the PTH.
    Type: Grant
    Filed: October 8, 1998
    Date of Patent: June 20, 2000
    Assignee: International Business Machines Corporation
    Inventor: James Richard Stack