Patent ID: 9087733
Filing Date: 2015-07-21
Classification: H01L

Abstract:
1. A device comprising: a silicon (Si) substrate; a deep n-well or deep p-well formed in the Si substrate; a first p-well or first n-well, respectively, formed above the deep n-well or deep p-well; a plurality of deep trenches having a first depth extending into the deep n-well or deep p-well; a plurality of first and second shallow trenches each first and second shallow trench having a second depth less than the first depth, a first or second shallow trench being formed between a pair of adjacent deep trenches; an oxide filling each deep trench and each of the first and second shallow trenches; a silicon fin on each side of each of the first and second shallow trenches; and a second n-well or a second p-well formed through and around a bottom portion of each first or second shallow trench, respectively.