Patent ID: 7531877
Filing Date: 2009-05-12
Classification: H01L

Abstract:
1. A semiconductor device comprising: a silicon-on-insulator (SOI) substrate having a single-crystal silicon device forming layer disposed on a silicon substrate through a buried insulating film; a bleeder resistor region comprised of a plurality of resistors each of which is made of the single-crystal silicon device forming layer; a MOS transistor disposed on the single-crystal silicon device forming layer, the MOS transistor having a thin gate oxide film and a gate electrode disposed on the thin gate oxide film; a plurality of electrodes made of the same material as that of the gate electrode of the MOS transistor and being disposed over the respective resistors via a thin insulating film made of the same material as that of the thin gate oxide film of the MOS transistor, each electrode being fixed to an identical potential as that of the corresponding resistor over which the electrode is disposed; a plurality of diffusion regions disposed in surface portions of the silicon substrate located under the respective resistors and under the buried insulating film, each diffusion region being fixed to the identical potential as that of the corresponding resistor under which the diffusion region is disposed; and a plurality of contact holes formed at least through the buried oxide film, each of the contact holes being filled with a conductor that electrically connects a corresponding one of the resistors to the corresponding electrode and diffusion region.