Granted Patent
Utility
US 6,143,671 · App. 09/195,695
Semiconductor device manufacturing method
Inventor:
Kazumi Sugai
Patented Case
View Patent ↗
Granted: Nov 7, 2000
Filed: Nov 19, 1998
Inventor
Kazumi Sugai
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.