Granted Patent
Utility
US 5,869,404 · App. 08/847,811
Method for forming contact hole of semiconductor device
Inventors:
Jeong Ho Kim, Jin Woong Kim
Patented Case
View Patent ↗
Granted: Feb 9, 1999
Filed: Apr 25, 1997
Inventors
Jeong Ho Kim
Jin Woong Kim
Assignee (at issue)
Hyundai Electronics Industries 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.