Patent ID: 9478608
Filing Date: 2016-10-25
CPC Classification: H01L

Claim Text:
1. An apparatus comprising: an n-type isolation structure in a p-type region of a substrate; a first p-type well region in the n-type isolation structure; a first p-type active region and a first n-type active region in the first p-type well region, wherein the first n-type active region and the first p-type active region are electrically connected to a first terminal; a second p-type well region in the n-type isolation structure and spaced apart from the first p-type well region, wherein the n-type isolation structure electrically isolates the first and second p-type well regions from the p-type region of the substrate; a second p-type active region and a second n-type active region in the second p-type well region, wherein the second n-type active region and the second p-type active region are electrically connected to a second terminal; and a blocking voltage tuning structure positioned between the first and second n-type active regions.