Patent ID: 8115254

Claim:
A semiconductor structure comprising: a semiconductor-on-insulator (SOI) substrate including a handle substrate, at least one buried insulator portion located on a top surface of said handle substrate, and at least one top semiconductor portion located on a top surface of said at least one buried insulator portion; a trench extending from a top surface of said at least one top semiconductor portion to a depth below said top surface of said at least one buried insulator portion; and a stack of an insulator stressor plug and a silicon oxide plug located in said trench, wherein said insulator stressor plug has a bottom surface in direct contact with the handle substrate at a bottom surface of said trench and an upper surface of the insulator stressor plug is present between the top surface of the at least one top semiconductor portion and a lower surface of the at least one top semiconductor portion, and said silicon oxide plug has an upper surface spanning an entire width of the trench, wherein the upper surface of the silicon oxide plug is substantially coplanar with said top surface of said at least one top semiconductor portion, and wherein said silicon oxide plug has sidewalls in direct contact with sidewalls of said trench, and further wherein said insulator stressor plug and said silicon oxide plug are the only materials filling said trench.