Granted Patent
Utility
US 6,482,681 · App. 09/565,922
Hydrogen implant for buffer zone of punch-through non epi IGBT
Inventors:
Richard Francis, Chiu Ng
Patented Case
View Patent ↗
Granted: Nov 19, 2002
Filed: May 5, 2000
Inventors
Richard Francis
Chiu Ng
Assignee (at issue)
International Rectifier 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.