Patent ID: 8637924

Claim:
A transistor, comprising: a trench formed in a semiconductor body, the trench having sidewalls and a bottom; a first semiconductor material disposed in the trench adjacent the sidewalls; a second semiconductor material disposed in the trench and spaced apart from the sidewalls by the first semiconductor material, the second semiconductor material having a different band gap than the first semiconductor material; a gate material disposed in the trench and spaced apart from the first semiconductor material by the second semiconductor material, the gate material providing a gate of the transistor; and source and drain regions arranged in the trench with a channel interposed between the source and drain regions in the first or second semiconductor material so that the channel has a lateral current flow direction along the sidewalls of the trench; wherein a corner region of the trench is implanted so that the corner region is deactivated and the channel is not formed in the corner region.