Granted Patent
Utility
US 5,648,285 · App. 08/533,966
Method for manufacturing semiconductor nonvolatile memory device with field insulating layer
Inventor:
Kiyokazu Ishige
Patented Case
View Patent ↗
Granted: Jul 15, 1997
Filed: Sep 26, 1995
Inventor
Kiyokazu Ishige
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.