Granted Patent
Utility
US 5,908,309 · App. 09/067,861
Fabrication method of semiconductor device with CMOS structure
Inventor:
Takeshi Andoh
Patented Case
View Patent ↗
Granted: Jun 1, 1999
Filed: Apr 28, 1998
Inventor
Takeshi Andoh
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.