Frank Marion Wanlass (May 17, 1933, in Thatcher, AZ – September 9, 2010, in Santa Clara, California) was an American electrical engineer.
Wanlass invented CMOS (complementary MOS) logic circuits with Chih-Tang Sah in 1963, while working at Fairchild Semiconductor.
[2] In 1963, while studying MOSFET (metal–oxide–semiconductor field-effect transistor) structures, he noted the movement of charge through oxide onto a gate.
[5] He was also remembered for his contribution to solving threshold voltage stability in MOS transistors due to sodium ion drift.
[6] In 2009, on the 50th anniversary of both the MOSFET and the integrated circuit, Frank Wanlass was inducted into the National Inventors Hall of Fame for his invention of CMOS logic.