Granted Patent
Utility
US 5,973,371 · App. 08/902,109
Semiconductor device with marginless contact hole
Inventor:
Naoki Kasai
Patented Case
View Patent ↗
Granted: Oct 26, 1999
Filed: Jul 29, 1997
Inventor
Naoki Kasai
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.