Granted Patent
Utility
US 6,803,248 · App. 10/029,093
Chemistry for etching quaternary interface layers on InGaAsP mostly formed between GaAs and InxGa(1-x)P layers
Inventors:
Mariam Sadaka, Jonathan K. Abrokwah
Patented Case
View Patent ↗
Granted: Oct 12, 2004
Filed: Dec 21, 2001
Inventors
Mariam Sadaka
Jonathan K. Abrokwah
Assignee (at issue)
Freeescale Semiconductor, 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.