Patent ID: 6674131
Filing Date: 2004-01-06
Classification: H01L,Y10S

Abstract:
A semiconductor device, comprising:a compound semiconductor layer made of a compound semiconductor selected from the group consisting of a SiC layer, a GaN layer, an InP layer, an InGaAs layer, and an InGaPN layer; an inductor provided on the compound semiconductor layer; an inverter circuit including a MISFET provided on the compound semiconductor layer; a rectifying circuit including a Shottky diode provided on the compound semiconductor device; and a capacitor provided on the compound semiconductor layer, wherein the MISFET is composed of an active region formed on the compound semiconductor layer, a gate insulating film formed on the active region, a gate electrode formed on the gate insulating film and source and drain regions formed in a region located on both sides of the gate electrode, and the active region in a portion sandwiched between the source region and the drain region is composed of a plurality of first semiconductor layers and a plurality of second semiconductor layers containing an impurity for carriers at a high concentration and smaller in film thickness than the first semiconductor layer, the first and second semiconductor layers being alternately stacked, the device functioning as a lighting circuit for a fluorescent lamp device.