Masatoshi Shima
| Masatoshi Shima | |
|---|---|
| Native name | 嶋正利 |
| Born |
August 22, 1943 Shizuoka, Japan |
| Fields |
Electrical engineering microprocessor |
| Institutions |
University of Aizu (2000) Busicom (1969) Intel Zilog |
| Alma mater |
Tohoku University (B.S., 1967) Tsukuba University (Dr.Eng., 1991) |
| Known for | Intel 4004 Intel 8080 |
| Notable awards |
Kyoto Prize (1997) Computer History Museum Fellow (2009) |
Masatoshi Shima (嶋 正利 Shima Masatoshi?, born August 22, 1943, Shizuoka) is a Japanese electronics engineer, who was one of the designers of the world's first microprocessor, the Intel 4004, along with Federico Faggin, Ted Hoff, and Stanley Mazor.
He studied organic chemistry at Tohoku University in Sendai, Japan. With poor prospects for employment in the field of chemistry, he went to work for Busicom, a business calculator manufacturer. There, he learned about software and digital logic design. When Busicom decided to use large-scale integration circuits in their calculator products, they approached the American companies Mostek and Intel for manufacturing help. The job was given to Intel, who back then was more of a memory company and had facilities to manufacture the high density silicon gate MOS chip Busicom required. Following Marcian "Ted" Hoff's initial conception, formulated in 1969, Shima later helped design the 4004 processor, working at the Intel offices for six months—from April until October 1970—with Federico Faggin, the project leader. His company then sold the rights to use the 4004 to Intel, with the exception of use in business calculators.
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