Granted Patent
Utility
US 6,368,921 · App. 09/671,888
Manufacture of trench-gate semiconductor devices
Inventors:
Erwin Hijzen, Henricus G. R. Maas, Cornelius E. Timmering
Patented Case
View Patent ↗
Granted: Apr 9, 2002
Filed: Sep 28, 2000
Inventors
Erwin Hijzen
Henricus G. R. Maas
Cornelius E. Timmering
Assignee (at issue)
U.S. Philips 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.