Patent ID: 6713815
Filing Date: 2004-03-30
Classification: H01L

Abstract:
A semiconductor device, comprising: a first input terminal; a second input terminal; and a differential transistor pair comprised of a first transistor and a second transistor for converting a voltage difference between the first input terminal and the second input terminal into a drain current difference between the first transistor and the second transistor, the first transistor and the second transistor each having a source region, a drain region, a well region disposed between the source and drain regions, a gate oxide film provided on an upper surface of the well region, a gate electrode provided on the gate oxide film, a buried oxide film provided under the source region, the drain region, and the well region, and a first conductivity type substrate region provided under the buried oxide film, the first conductivity type substrate region of the first transistor being the first input terminal and the first conductivity type substrate region of the second transistor being the second input terminal.