Patent ID: 7800195

Claim:
A semiconductor apparatus comprising: a semiconductor substrate; a temperature sensing diode that is disposed on a surface part of the semiconductor substrate, wherein a relation between a forward current flowing through the temperature sensing diode and a corresponding voltage drop across the temperature sensing diode varies with temperature; a first wire; a second wire insulated from the first wire; a capacitor that has a first conduction member and a second conduction member; a first insulating layer disposed on a surface of the semiconductor substrate; a conduction layer disposed on the first insulating layer; a second insulating layer disposed on the conduction layer; and a polycrystalline silicon layer disposed on the second insulating layer, wherein the first conduction member is connected with an anode of the temperature sensing diode via the first wire, the second conduction member is connected with a cathode of the temperature sensing diode via the second wire, the capacitor is configured to reduce noise to act on the temperature sensing diode, and disposed such that the capacitor and the temperature sensing diode have a layered structure in a thickness direction of the semiconductor substrate, the surface part of the semiconductor substrate includes a semiconductor region, the capacitor includes a first electrode provided by the semiconductor region and a second electrode provided by the conduction layer, and the polycrystalline silicon layer provides the temperature sensing diode, which is formed by selective implantation of impurities in the polycrystalline silicon layer.