Patent ID: 7821067

Claim:
A structure during formation of an electronic device, the structure comprising: a substrate; an insulating layer over the substrate; a first semiconductor portion overlying the insulating layer, the first semiconductor portion comprises substantially none of a first semiconductor element; and a second semiconductor portion overlying the insulating layer, wherein the second semiconductor portion comprises a first concentration of the first semiconductor element; and a third semiconductor portion overlying the insulating layer and lying between the first and second semiconductor portions, wherein: the third semiconductor portion includes a concentration gradient of the first semiconductor element; the third semiconductor portion has a first region and a second region; the first region is closer to the first semiconductor portion than the second semiconductor portion; the second region is closer to the second semiconductor portion than the first semiconductor portion; each of the first region and the second region includes the first semiconductor element; and a concentration of the first semiconductor element within the first region is greater than a concentration of the first semiconductor element within the second region.