Granted Patent
Utility
US 5,847,444 · App. 08/705,840
Semiconductor device with reduced aspect ratio contact hole
Inventor:
Yasushi Yamazaki
Patented Case
View Patent ↗
Granted: Dec 8, 1998
Filed: Aug 30, 1996
Inventor
Yasushi Yamazaki
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.