Patent ID: 6646319
Filing Date: 2003-11-11
Classification: H01L

Abstract:
A semiconductor device, which includes a semiconductor substrate comprising:a first area, which is located in a surface of the substrate and in which an electrical noise is generated; a second area, which is located in the surface and to which the noise is transmitted; a first isolating region, which is located around the first area; a second isolating region, which is located around the first isolating region; a third isolating region, which is located around the second area; a third area, which is located between the second isolating region and the third isolating region; a fourth area, which is located between the first and second isolating regions, wherein a potential of the fourth area is fixed; a point of contact, which is located outside the substrate and has a predetermined potential; a field ground area, which is located in the surface and electrically connected to the point of contact to fix the potential of the field ground area; and a first wiring line, which electrically connects the fourth area and the field ground area, wherein the first wiring line is electrically separated from the third area.