Patent ID: 9018706
Filing Date: 2015-04-28
Classification: H01L

Abstract:
1. A monolithic semiconductor device including at least first, second, and third external terminals, comprising: a substrate; a power metal oxide semiconductor field effect transistor (MOSFET) formed over the substrate, the power MOSFET including a first set of drain fingers and source fingers separated by a first gate finger and a second set of drain fingers and source fingers separated by a second gate finger, the drain fingers being coupled to the first external terminal of the monolithic semiconductor device operating at a first potential, the source fingers being coupled to the second external terminal of the monolithic semiconductor device operating at a second potential which is different from the first potential; a first diode including a cathode coupled to the first set of drain fingers and to the second set of drain fingers and anode coupled to the first set of source fingers and to the second set of source fingers; a semiconductor region formed over the substrate; and a second diode formed as a metal layer over the semiconductor region and disposed between the first set of drain fingers and second set of drain fingers, the metal layer operating as an anode of the second diode coupled to the first external terminal of the monolithic semiconductor device, the semiconductor region operating as a cathode of the second diode coupled to the third external terminal of the monolithic semiconductor device operating at a third potential which is different than the first and second operating potentials.