Granted Patent
Utility
US 4,990,983 · App. 07/130,914
Radiation hardened field oxides for NMOS and CMOS-bulk and process for forming
Inventors:
Frank Z. Custode, John G. Poksheva
Patented Case
View Patent ↗
Granted: Feb 5, 1991
Filed: Dec 7, 1987
Inventors
Frank Z. Custode
John G. Poksheva
Assignee (at issue)
Rockwell International Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.