Patent ID: 9537486
Date: 2017-01-03
CPC Classifications: H01L,H02M,H03K

Claim:
1. A semiconductor device comprising: a plurality of second conductivity type first well regions, each surrounded by a first conductivity type region, which are provided spaced from one another on a front surface layer of a semiconductor substrate; and a first conductivity type second well region, provided in contact with all the plurality of first well regions, which configures the first conductivity type region and to which a low potential is applied, wherein the plurality of first well regions each include: a high side driver circuit, provided on a front surface layer of each respective first well region, a potential on a low potential side of which is higher than the low potential; a second conductivity type pickup region, provided on the front surface layer of each respective first well region, to which is connected a high potential side of a power source of the high side driver circuit; a high voltage junction termination structure provided in each respective first well region, between the second well region and the pickup region; and two level shift elements, each provided in one portion of the high voltage junction termination structure and the second well region, which send signals for driving the high side driver circuit, and for at least one of the respective first well regions, the two level shift elements of the at least one first well region are disposed on respective non-opposed surfaces which are not opposite to another of the first well regions that is adjacent to the at least one first well region, and distances to high potential regions of the two level shift elements from a pn junction surface, of a pn junction surface of the at least one first well region and the second well region, which is opposite to the another of the first well regions, are greater than or equal to 150 μm and less than or equal to 500 μm.