Patent ID: 7719057

Claim:
An apparatus, comprising: a substrate; a first semiconductor fin coupled with the substrate, the first semiconductor fin comprising a first side and a second side, a first impurity being introduced into the first side of the first semiconductor fin; a second semiconductor fin coupled with the substrate, the second semiconductor fin comprising a first side and a second side, the first side of the second semiconductor fin being adjacent to the second side of the first semiconductor fin, the first impurity being introduced into the second side of the second semiconductor fin; a first oxide comprising a first thickness coupled with the first side of the first semiconductor fin and the second side of the second semiconductor fin; and a second oxide comprising a second thickness coupled with the second side of the first semiconductor fin and the first side of the second semiconductor fin, the second thickness being different from the first thickness as a result of the first impurity introduced to the first side of the first semiconductor fin and the second side of the second semiconductor fin.