Patent ID: 9136362
Filing Date: 2015-09-15
Classification: H01L

Abstract:
1. A semiconductor device having a lateral element, the semiconductor device comprising: a semiconductor substrate including a first conductivity-type semiconductor layer; a first electrode on a surface of the semiconductor layer; a second electrode on the surface of the semiconductor layer; and a resistive field plate wound in a scroll shape around the first electrode and extending toward the second electrode, wherein a resistance of the resistive field plate is equal to or less than 1×10 wherein the semiconductor substrate is a SOI substrate including a supporting substrate, a buried insulating layer on the supporting substrate, and an active layer on the buried insulating layer, the active layer serving as the semiconductor layer, the active layer has a first conductivity-type interface layer at an interface with the buried insulating layer, a concentration of a second impurity in the interface layer is greater than a concentration of the second impurity in a remaining portion of the active layer, the second impurity is of first conductivity type, a separation distance between adjacent turns of the scroll shape is equal to or less than 1 μm, and a dose of the second impurity in the interface layer ranges from 1.3×10