Granted Patent
Utility
US 6,111,320 · App. 09/045,875
Semiconductor device having a barrier film for preventing penetration of moisture
Inventor:
Ryuichi Okamura
Patented Case
View Patent ↗
Granted: Aug 29, 2000
Filed: Mar 23, 1998
Inventor
Ryuichi Okamura
Assignee (at issue)
NEC 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.