Granted Patent
Utility
US 6,420,257 · App. 09/746,899
Process for forming trenches and contacts during the formation of a semiconductor memory device
Inventor:
Philip J. Ireland
Patented Case
View Patent ↗
Granted: Jul 16, 2002
Filed: Dec 22, 2000
Inventor
Philip J. Ireland
Assignee (at issue)
Micron Technology, Inc.
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.