Patents Represented by Attorney, Agent or Law Firm Edward CX. Kwok
  • Patent number: 6242354
    Abstract: Sidewall spacers, adjacent a gate electrode and source/drain regions of a MOS transistor are formed of a dielectric material that can be completely or partially removed to “lift-off” silicide stringers if formed. After silicide stringer removal, a dielectric layer, having a first portion and second portion that are selectively etchable with respect to one another, is deposited. A gate contact opening is formed in the dielectric layer where the opening is essentially the same dimension as the gate length. Alignment of the opening to the gate electrode is buffered by the thickness of the first portion of the dielectric layer, adjacent sidewalls of the gate electrode.
    Type: Grant
    Filed: February 12, 1998
    Date of Patent: June 5, 2001
    Assignee: National Semiconductor Corporation
    Inventor: Michael E. Thomas