Granted Patent
Utility
US 5,672,907 · App. 08/618,170
Semiconductor device having character in BPSG film
Inventor:
Yasuo Kasagi
Patented Case
View Patent ↗
Granted: Sep 30, 1997
Filed: Mar 19, 1996
Inventor
Yasuo Kasagi
Assignee (at issue)
NIPPON STEEL 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.