Patent ID: 7719089

Claim:
A semiconductor device comprising: a semiconductor substrate, said semiconductor substrate having a top surface, said top surface having a first side and a second side, the first side being adjacent to the second side; an n-channel MOSFET formed on the first side of the substrate; a first layer formed to cover only the n-channel MOSFET, wherein the first layer has a first flexure-induced stress, wherein said first layer is formed while said n-channel MOSFET and said semiconductor substrate are flexed, thereby causing a compressive stress within said first layer upon release from being flexed, wherein the first flexure-induced stress is greater than an inherent stress of the first layer, said inherent stress of the first layer being the stress of the first layer when said first layer is without flexure; a p-channel MOSFET formed on the second side of the substrate; a second layer, formed to cover only the p-channel MOSFET, wherein the second layer has a second flexure-induced stress, wherein said second layer is formed while said p-channel MOSFET and said semiconductor substrate are flexed, thereby causing a tensile stress within said second layer upon release from being flexed, wherein the second flexure-induced stress is greater than an inherent stress of the second layer, said inherent stress of the second layer being the stress of the second layer when said second layer is without flexure.