Granted Patent
Utility
US 5,954,888 · App. 09/020,979
Post-CMP wet-HF cleaning station
Inventors:
Anand Gupta, Chris Karlsrud, Periya Gopalan
Patented Case
View Patent ↗
Granted: Sep 21, 1999
Filed: Feb 9, 1998
Inventors
Anand Gupta
Chris Karlsrud
Periya Gopalan
Assignee (at issue)
SPEEDFAM CO., LTD.
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.