Granted Patent
Utility
US 6,423,592 · App. 09/893,218
PZT layer as a temporary encapsulation and hard mask for a ferroelectric capacitor
Inventor:
Shan Sun
Patented Case
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Granted: Jul 23, 2002
Filed: Jun 26, 2001
Inventor
Shan Sun
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.