Granted Patent
Utility
US 6,426,254 · App. 09/328,763
Method for expanding trenches by an anisotropic wet etch
Inventors:
Stephen Kudelka, Alexander Michaelis, Dirk Tobben
Patented Case
View Patent ↗
Granted: Jul 30, 2002
Filed: Jun 9, 1999
Inventors
Stephen Kudelka
Alexander Michaelis
Dirk Tobben
Assignee (at issue)
Infineon Technologies AG
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.