Patent ID: 6504153
Filing Date: 2003-01-07
Classification: H01L,Y02E

Abstract:
A semiconductor infrared detecting device comprising:a substrate; a supporting section arranged on the substrate; and a thermo-sensing section supported by the supporting section above the substrate in a floating state, the thermo-sensing section comprising, a first layer consisting essentially of a semiconductor of a first conductivity type, and a second layer consisting essentially of a semiconductor of a second conductivity type, and disposed on the first layer to form a pn junction between the first and second layers, the second layer being in contact with the first layer via an interface comprising projections and recesses, wherein infrared rays are detected with reference to a change in electric current flowing through the pn junction, which is caused when the thermo-sensing section is irradiated with the infrared rays in a state where a bias voltage is applied to the pn junction, and wherein the projections have a width of from 0.3 to 3 &mgr;m in a first direction substantially perpendicular to a thickness direction of the thermo-sensing section.