Granted Patent
Utility
US 5,920,122 · App. 08/835,060
Contact structure using barrier metal and method of manufacturing the same
Inventors:
Ryoichi Matsumoto, Yoshiyuki Kawazu
Patented Case
View Patent ↗
Granted: Jul 6, 1999
Filed: Apr 3, 1997
Inventors
Ryoichi Matsumoto
Yoshiyuki Kawazu
Assignee (at issue)
OKI ELECTRIC INDUSTRY CO., LTD.
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.