Semiconductor device, semiconductor gate array, electro-optical device, and electronic equipment

摘要

A structure is provided which suppresses a parasitic bipolar effect without decreasing the breakdown voltage at the junctions between the excessive carrier extracting region and source/drain regions of a MOS transistor for a voltage of approximately 15 volts in a semiconductor device formed on a semiconductor layer on an insulating layer. In the MOS transistor having a source tied body structure, a semiconductor regions having a low impurity concentration is formed between a regions for extracting excessive carriers and source/drain regions. Thus, the breakdown voltage at the junctions between the extracting regions and the source/drain regions is increased and a parasitic bipolar effect is suppressed without breakdown between the extracting regions and the source/drain regions.