Patent ID: 7755147
Filing Date: 2010-07-13
Classification: H01L

Abstract:
1. A semiconductor device comprising: a first conductivity type semiconductor substrate; a voltage supply terminal provided on said semiconductor substrate; one or more elements including a second conductivity type well portion and disposed on said semiconductor substrate; a second conductivity type first conductive layer formed contiguously with said second conductivity type well portion under said one or more elements and connecting said second conductivity type well portion of said one or more elements to said voltage supply terminal; a first conductivity type second conductive layer formed contiguously with a lower side of said second conductivity type first conductive layer; a first conductivity type third conductive layer formed above said second conductivity type first conductive layer; and one or more elements having said first conductivity type third conductive layer formed as a first conductivity type well portion, wherein said first conductivity type third conductive layer is formed between said second conductivity type well portion and a connecting position of said voltage supply terminal to said second conductivity type first conductive layer, and said second conductivity type first conductive layer connects said voltage supply terminal to said second conductivity type well portion under said first conductivity type third conductive layer.