Patent ID: 9184097
Filing Date: 2015-11-10
Classification: H01L

Abstract:
1. A semiconductor device comprising: a substrate of a first conductivity type; a deep well of a second conductivity type, formed on the substrate; and a first high-side device, disposed within the deep well and comprising: a layer of the second conductivity type, formed on the substrate, wherein the layer is in direct contact with the substrate; a well of the first conductivity type, formed within the deep well, wherein the well is in direct contact with the layer and fully separated from the substrate by the layer; first and second regions of the second conductivity type, formed within the well, wherein each of the first and second regions are fully separated from the layer by the well; and a first poly-silicon material, disposed between the first region and the second region and on the deep well, wherein a normal prosection area of the layer with respect to the substrate is larger than a normal projection area of the well with respect to the substrate.