Granted Patent
Utility
US 5,229,309 · App. 07/828,886
Method of manufacturing semiconductor device using a ferroelectric film over a source region
Inventor:
Koji Kato
Patented Case
View Patent ↗
Granted: Jul 20, 1993
Filed: Feb 24, 1992
Inventor
Koji Kato
Assignee (at issue)
RAMTRON 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.