Granted Patent
Utility
US 6,239,462 · App. 09/120,893
Semiconductor capacitive device having improved anti-diffusion properties and a method of making the same
Inventors:
Keisaku Nakao, Akihiro Matsuda, Yasufumi Izutsu, Toyoji Ito, Takumi Mikawa, Toru Nasu, Yoshihisa Nagano, Keisuke Tanaka, Toshie Kutsunai
Patented Case
View Patent ↗
Granted: May 29, 2001
Filed: Jul 23, 1998
Inventors
Keisaku Nakao
Akihiro Matsuda
Yasufumi Izutsu
Toyoji Ito
Takumi Mikawa
Toru Nasu
Yoshihisa Nagano
Keisuke Tanaka
Toshie Kutsunai
Assignee (at issue)
Matsushita Electronics 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.