Patent ID: 7436015

Claim:
A charge pump circuit which includes MOSFETs and MOS capacitors formed on the same semiconductor substrate, wherein at least one of said MOS capacitors comprises: a multiplicity of first electrodes formed at multiple locations within one region of said semiconductor substrate, wherein each of said multiplicity of first electrodes has an elongate share extending in parallel with other of said multiplicity of first electrodes, and said multiplicity of first electrodes are interconnected; insulating layers covering at least respective regions between neighboring first electrodes; and a multiplicity of second electrodes formed on/above said respective insulating layers, wherein each of said multiplicity of second electrodes has an elongate shape, having a larger width than said first electrode, extending between two of said neighboring first electrodes, and said multiplicity of second electrodes are interconnected; wherein said one region has a specific conduction type isolated from other regions, and each of said multiplicity of first electrodes has a high conductivity and is formed by increasing the conductivity of said one region, and wherein the number of said first electrodes is equal to or greater than 3; and wherein all said first electrodes have the same conduction type, and all said first electrodes being formed within one region of the same conduction type.