Geoffrey William Arnold Dummer, (25 February 1909 – 9 September 2002) was a British electronics engineer and consultant who is credited as being the first person to conceptualise and build a prototype of the integrated circuit, commonly called the microchip, in the late-1940s and early 1950s. Dummer passed the first radar trainers and became a pioneer of reliability engineering at the Telecommunications Research Establishment in Malvern in the 1940s.
Born in Hull, Dummer studied electrical engineering at Manchester College of Technology starting in the early 1930s. By the early 1940s he was working at the Telecommunications Research Establishment in Malvern (later to become the Royal Radar Establishment).
His work with colleagues at TRE led him to the belief that it would be possible to fabricate multiple circuit elements on and into a substance like silicon. In 1952 he presented his work at a conference in Washington, DC, some six years before Jack Kilby of Texas Instruments was awarded a patent for essentially the same idea. As a result he has been called "The Prophet of the Integrated Circuit"
Dummer was admitted to a Nursing home in Malvern in 2000 due to a stroke and died in September 2002, aged 93.