Granted Patent
Utility
US 5,355,023 · App. 08/068,185
Semiconductor device having conducting layers connected through contact holes
Inventors:
Yugo Tomioka, Yukihiro Okeda, Yasuo Sato
Patented Case
View Patent ↗
Granted: Oct 11, 1994
Filed: May 28, 1993
Inventors
Yugo Tomioka
Yukihiro Okeda
Yasuo Sato
Assignee (at issue)
NIPPON STEEL CORPORATION
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.