Patent ID: 6573582
Filing Date: 2003-06-03
Classification: H01L

Abstract:
A semiconductor device comprising:a semiconductor substrate; a bipolar transistor formed on the semiconductor substrate and having a collector region; a Schottky diode formed in the collector region of the bipolar transistor; and a potential isolating layer isolating the collector region and the semiconductor substrate in potential from each other, wherein the collector region is formed of a semiconductor of a first conduction type, the semiconductor substrate is formed of a semiconductor of a second conduction type, and the potential isolating layer includes a side-isolating layer of the second conduction type surrounding a side of the bipolar transistor, a bottom-isolating layer of the second conduction type covering a bottom of the bipolar transistor, and a floating buried layer of the first conduction type interposed between the bottom-isolating layer and the semiconductor substrate.