Patent ID: 7344945

Claim:
A method of fabrication a striped cell trench metal-oxide-semiconductor field effect transistor (TMOSFET) comprising: depositing a first semiconductor layer upon a semiconductor substrate, wherein said first semiconductor layer is doped with a first type of impurity and said semiconductor substrate is doped with a second type of impurity; depositing a second semiconductor layer upon said first semiconductor layer; etching a first plurality of trenches in said first semiconductor layer, said second semiconductor layer and a portion of said semiconductor substrate, wherein said first plurality of trenches are substantially parallel with respect to each other; forming a first dielectric layer in said first plurality of trenches; depositing a first polysilicon layer in said first plurality of trenches; depositing a second dielectric layer in said first plurality of trenches upon said first polysilicon layer; doping said first semiconductor layer with said first type of impurity; doping a portion of said second semiconductor layer, opposite said first semiconductor layer, with said second type of impurity at a first concentration; and etching a second plurality of trenches in said first semiconductor layer said second semiconductor layer and a portion of said semiconductor substrate, wherein said second plurality of trenches are substantially parallel with respect to each other and disposed between said first plurality of trenches; doping a portion of said first semiconductor layer proximate said second plurality of trenches; forming a silicide along said semiconductor substrate and said first semiconductor layer in said second plurality of trenches; and depositing a third dielectric layer in said second plurality of trenches.