Granted Patent
Utility
US 6,441,492 · App. 09/672,473
Diffusion barriers for copper interconnect systems
Inventor:
James A. Cunningham
Patented Case
View Patent ↗
Granted: Aug 27, 2002
Filed: Sep 28, 2000
Inventor
James A. Cunningham
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.