Patent ID: 9343453
Filing Date: 2016-05-17
CPC Classification: H01L

Claim Text:
1. A semiconductor device comprising: a substrate; a first circuit region on the substrate, the first circuit region including a first circuit having first power supply voltage; a second circuit region on the substrate, the second circuit region including a second circuit having a second power supply voltage lower than the first power supply voltage; a separation region, on the substrate, surrounding the first circuit region to separate the first circuit region from the second circuit region, the separation region including: a first coupling transistor for coupling the first circuit to the second circuit, the first coupling transistor having a control electrode, a first electrode, and a second electrode, the first electrode being disposed on the side of the first circuit region, the second electrode being disposed on the side of the second circuit region; and a layer-structured first field plate electrode at least partially surrounding the first circuit region, wherein the first field plate electrode has a first portion, on the side of the first circuit region, coupled to the first electrode of the first coupling transistor, and a second portion, on the side of the second circuit region, coupled to a ground potential or the second circuit.