Yoshiaki Hagiwara

Yoshiaki Hagiwara (July 4, 1948 followed by is MS degree in 1972 and Ph.D. in 1975 at the same University, under the guidance of his advisor Carver Mead. He changed his name to Hagiwara upon getting married in 1974.

Inventions The first mass-produced consumer CCD video camera, the CCD-G5, was released by Sony in 1983, based on a prototype developed by Hagiwara in 1981.

Hagiwara was elected Fellow of the IEEE in 2001, "For pioneering work on, and development of, solid-state imagers", for, among other things, his 1975 invention of a photodiode that was later branded by Sony the "hole accumulation device" (HAD), and which Sony and he claim as the origin of the pinned photodiode.