Granted Patent
Utility
US 6,482,555 · App. 09/976,336
Method of patterning sub-0.25&lgr; line features with high transmission, “attenuated” phase shift masks
Inventors:
J. Fung Chen, Roger Caldwell, Tom Laidig, Kurt E. Wampler
Patented Case
View Patent ↗
Granted: Nov 19, 2002
Filed: Oct 15, 2001
Inventors
J. Fung Chen
Roger Caldwell
Tom Laidig
Kurt E. Wampler
Assignee (at issue)
ASML Masktools Netherlands B.V.
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.