Patents Represented by Attorney, Agent or Law Firm Workman, Nydeggar & Seeley
  • Patent number: 5886391
    Abstract: Inventive antireflective structures comprise a semiconductor substrate having thereon a combination of a plurality of layers that either that absorb reflected light or that dissipate reflected light into patterns and intensities that do not substantially alter photoresist material on the semiconductor substrate. The semiconductor substrate has formed thereon a feature having a width of less than about 0.25 microns. Antireflective structures contemplated include a first layer of polysilicon and first layer of silicon nitride material that is formed upon the first layer of polysilicon. The antireflective structure has the ability to scatter unabsorbed light into patterns and intensities that are substantially ineffective to alter photoresist material exposed to said patterns and intensities.
    Type: Grant
    Filed: April 18, 1997
    Date of Patent: March 23, 1999
    Assignee: Micron Technology, Inc.
    Inventors: Ardavan Niroomand, Fernando Gonzalez
  • Patent number: D469996
    Type: Grant
    Filed: September 18, 2002
    Date of Patent: February 11, 2003
    Assignee: Lifetime Products, Inc.
    Inventor: Kent Ashby
  • Patent number: D470352
    Type: Grant
    Filed: September 18, 2002
    Date of Patent: February 18, 2003
    Assignee: Lifetime Products, Inc.
    Inventor: Lynn Curtis Strong