Patent ID: 6732335
Filing Date: 2004-05-04
Classification: G06F,H01L

Abstract:
A semiconductor IC (Integrated Circuit) comprising:a power supply circuit for feeding a voltage to a utility circuit; and a stabilizing circuit for stabilizing the voltage to be applied to the utility circuit; wherein said IC includes a semiconductor substrate generally of nâˆ’ conductivity type having a primary surface, and first and second layers formed over the primary surface differently in level in a direction normal to the primary surface; said IC having regions, in which said stabilizing circuit and utility circuit are formed, being divided into a plurality of blocks each constituting a standard cell, connections of circuit devices included in the standard cells and forming the utility circuit being wired in a wiring region in the first layer, said stabilizing circuit comprising p+ and p+ wells formed in an nâˆ’ region of said substrate and connected to ground, the p+ wells corresponding to a source and a drain, respectively; said second layer being formed over the nâˆ’ region of said substrate and being connected to a reference voltage.