Patents by Inventor Zach Hatcher

Zach Hatcher 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).

  • Composition and method for selectively etching a silicon nitride film
    Patent number: 6303514
    Abstract: The invention relates to an aqueous phosphoric acid etch bath composition with a readily soluble silicon containing composition. The baths are used in the etching step of composite semiconductor device manufacturing.
    Type: Grant
    Filed: August 31, 2000
    Date of Patent: October 16, 2001
    Assignee: Ashland Inc.
    Inventors: Thomas B. Hackett, Zach Hatcher, III
  • Composition and method for selectively etching a silicon nitride film
    Patent number: 6162370
    Abstract: The invention relates to an aqueous phosphoric acid etch bath composition with a readily soluble silicon containing composition. The baths are used in the etching step of composite semiconductor device manufacturing.
    Type: Grant
    Filed: August 28, 1998
    Date of Patent: December 19, 2000
    Assignee: Ashland Inc.
    Inventors: Thomas B. Hackett, Zach Hatcher, III
  • Combined high density polyethylene bottle and cap
    Patent number: D369499
    Type: Grant
    Filed: June 28, 1995
    Date of Patent: May 7, 1996
    Assignee: Ashland Inc.
    Inventors: Paul G. Scott, Thomas C. Starner, Zach Hatcher