Frank Wanlass

Dr. Frank Marion Wanlass (May 17, 1933 in Thatcher, AZ – September 9, 2010 in Santa Clara, California) was an American electrical engineer. He obtained his PhD from the University of Utah. Wanlass invented CMOS logic circuits in 1963 while working at Fairchild Semiconductor. He was given U.S. patent #3,356,858 for "Low Stand-By Power Complementary Field Effect Circuitry" in 1967.[1]

In 1964, Wanlass moved to General Microelectronics (GMe), where he made the first commercial MOS integrated circuits, and a year later to General Instrument Microelectronics Division in New York,[2] where he developed four-phase logic.[3]

He was also remembered for his contribution to solving threshold voltage stability in MOS transistors due to sodium ion drift.

In 1991, Wanlass was awarded the IEEE Solid-State Circuits Award.[4]

In 2009, on the 50th anniversary of the integrated circuit, Frank Wanlass was inducted into the National Inventor's Hall of Fame.[5]

Wanlass died on 9 September 2010.


  1. ^ IC Knowledge - History of the Integrated Circuit - 1960s Archived 2007-04-19 at the Wayback Machine
  2. ^ Bob Johnstone (1999). We were burning: Japanese entrepreneurs and the forging of the electronic age. Basic Books. pp. 47–48. ISBN 978-0-465-09118-8.
  3. ^ Ross Knox Bassett (2007). To the Digital Age: Research Labs, Start-up Companies, and the Rise of MOS Technology. JHU Press. pp. 51, 129–130. ISBN 978-0-8018-8639-3.
  4. ^ List of Solid-State Circuits Award winners
  5. ^ "Inventors Hall of Fame Class of 2009| Patents & Patent Law". | Patents & Patent Law. 2009-02-19. Retrieved 2017-04-12.

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