Patent ID: 8283733

Claim:
A semiconductor device comprising: a monocrystalline silicon substrate; and a gate electrode, disposed above and insulated from a surface of the monocrystalline silicon substrate, the gate electrode overlying a first region of the monocrystalline silicon substrate, wherein the first region extends laterally at least as far as the gate electrode; wherein the monocrystalline silicon substrate has been subjected to a high temperature first anneal in a nitrogen releasing atmosphere while the substrate was coated by a doped sacrificial first oxide layer that was doped with diffusible atoms selected from the group consisting of CI, Br, S, F and P, where in the sacrificial first oxide layer, said diffusible atoms spread continuously over at least the entire first region, and where said diffusible atoms constituted at least 1% by atomic percentage of atoms in the sacrificial first oxide layer and where said high temperature of the first anneal allowed nitrogen atoms released from said atmosphere to penetrate into the substrate to a predetermined depth below the doped sacrificial first oxide layer; where the diffusible atoms and the nitrogen atoms are present in the monocrystalline silicon substrate, and at least one of (A) and (B) is true: (A) the nitrogen atoms spread continuously in the monocrystalline silicon substrate throughout at least the entire first region; (B) the diffusible atoms spread continuously in the monocrystalline silicon substrate throughout at least the entire first region; and where the gate electrode is coupled to drive circuitry for inducing a drift of minority charge carriers below said surface.