Granted Patent
Utility
US 4,666,557 · App. 06/680,034
Method for forming channel stops in vertical semiconductor surfaces
Inventors:
George J. Collins, Werner Metz
Patented Case
View Patent ↗
Granted: May 19, 1987
Filed: Dec 10, 1984
Inventors
George J. Collins
Werner Metz
Assignee (at issue)
NCR 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.