Reduction of overhead in adaptive body bias technology due to triple-well structure based on measurement and simulation

Abstract

This paper presents the significant reduction of the area overhead due to triple-well structure for adaptive body bias methods. Triple-well TEGs which include violation of design rules originating from voltage tolerance were implemented on a 65nm process. Reexamining voltage tolerance based on measurement results reduced deep n-wells spacing by 60% on the 65nm process. A new method for further overhead reduction is proposed based on a device simulation which is validated with measurement results.