Patent ID: 6615668
Filing Date: 2003-09-09
Classification: G01L

Abstract:
A semiconductor pressure sensor comprising:a semiconductor substrate having a (110)-surface-orientation and including a <100> crystal axis and a <110> crystal axis that is orthogonal to the <100> crystal axis; a pressure detector element formed on the semiconductor substrate, the pressure detector element outputting an electric signal according to a pressure imposed thereon; and a signal processor circuit including CMOS elements, formed on the semiconductor substrate, for processing the electric signal outputted from the pressure detector element, the signal processor circuit including an amplifier circuit having an input circuit composed of a pair of transistors from which the electric signal outputted from the pressure detector element is inputted to the amplifier circuit, wherein the pair of transistors is positioned on the semiconductor substrate so that currents between respective sources and drains thereof flow in a same direction.