Grace's Guide

British Industrial History

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GEC Plessey Semiconductors

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Presumably successor to Plessey Semiconductors and Marconi Electronic Devices

1990 Company launched, a subsidiary of GEC, the original plan to share ownership with Siemens having been dropped. Sites at Swindon, Plymouth, Lincoln and Oldham, and in America. Ex-Plessey business was about two-thirds of the total. The company would concentrate on high technology devices, being unable to compete effectively for the volume semiconductor business. About 120 staff expert in silicon technology would be transferred from the Caswell research centre to the factories to troubleshoot[1]

1994 Investment in the Plymouth plant announced[2]

1998 After George Simpson took over as Managing Director of GEC in 1996, several businesses were sold including GEC Plessey Semiconductors which was sold to Mitel Corporation of Canada[3].

See Also


Sources of Information

  1. The Times Wednesday, July 25, 1990
  2. The Times Wednesday, Sept. 28, 1994
  3. The Times Saturday, Feb. 14, 1998