Patent ID: 8528414

Claim:
An apparatus for measuring a mechanical quantity by use of a bridge circuit, comprising: a semiconductor substrate; a plurality of first impurity layers of a first conductivity type, formed on the semiconductor substrate, and extended in a first direction; a plurality of second impurity layers of the first conductivity type, formed on the semiconductor substrate, and extended in a second direction orthogonal to the first direction, wherein the bridge circuit includes: a first resistor between a first reference potential node and a first output node; a second resistor between a second reference potential node, and the first output node; a third resistor between the first reference potential node and a second output node; a fourth resistor between the second reference potential node and the second output node, wherein the first resistor, and the fourth resistor are each made up by connecting the plurality of the first impurity layers in series with each other, through the intermediary of an interconnect layer, the second resistor, and the third resistor are each made up by connecting the plurality of the second impurity layers in series with each other, through the intermediary of an interconnect layer, wherein the first impurity layer making up the fourth resistor is disposed between two layers of the first impurity layers for making up the first resistor, connected with each other through the intermediary of the interconnect layer, wherein the first impurity layer for making up the first resistor is disposed between two layers of the first impurity layers for making up the fourth resistor, connected with each other through the intermediary of the interconnect layer, wherein the second impurity layer for making up the third resistor is disposed between two layers of the second impurity layers for making up the second resistor, connected with each other through the intermediary of the interconnect layer, and wherein the second impurity layer for making up the second resistor is disposed between two layers of the second impurity layers for making up the third resistor, connected with each other through the intermediary of the interconnect layer.