Patent ID: 8823137
Filing Date: 2014-09-02
Classification: H01L

Abstract:
1. A semiconductor device including a plurality of resistance elements on and in a semiconductor substrate having a major surface, the semiconductor device comprising: a first well formed as an impurity diffusion region of a first conductive type in the semiconductor substrate; a second well formed as an impurity diffusion region of the first conductive type in the semiconductor substrate, separated from the first well in a direction parallel to the major surface of the semiconductor substrate; an intermediate dielectric film covering the major surface of the semiconductor substrate; a conductive layer held at a predetermined potential and formed above a semiconductor region in the semiconductor substrate between the first well and the second well; a first resistive layer formed on the intermediate dielectric film and electrically connected to the first well; and a second resistive layer formed on the intermediate dielectric film and electrically connected to the second well; wherein the first resistive layer and the first well form a first resistance element that is one of the resistance elements; the second resistive layer and the second well form a second resistance element that is another one of the resistance elements; and the intermediate dielectric film intervenes between the conductive layer and the semiconductor region.