Honeywell Solid State Electronics Center (SSEC) was a research and development facility of Honeywell Inc. that operated from 1957 to 1993 in Minneapolis, Minnesota, United States. The center was dedicated to the research, development, and production of solid-state electronics, including microelectronics, semiconductors, and related technologies.
During its operation, SSEC made significant contributions to the advancement of the semiconductor industry, particularly in the areas of integrated circuits, transistor design, and fabrication processes. Notable accomplishments of SSEC include the development of the first silicon transistor, the first commercial silicon planar transistor, and the first integrated circuit to use metal oxide semiconductor (MOS) technology.
In 1993, Honeywell closed the SSEC facility as part of a broader restructuring of its operations. The company's semiconductor business was subsequently sold to SGS-Thomson (now STMicroelectronics) in 1999.
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