Power MOS device
US7285822B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 2005 |
| Grant date | Oct 23, 2007 |
| Priority date | — |
| Expiry date | Feb 11, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D64/64
Abstract
A semiconductor device comprises a drain, a body disposed over the drain, having a body top surface, a source embedded in the body, extending downward from the body top surface into the body, a gate trench extending through the source and the body into the drain, a gate disposed in the gate trench, a source body contact trench having a trench wall and an anti-punch through implant that is disposed along the trench wall.A method of fabricating a semiconductor device comprises forming a hard mask on a substrate having a top substrate surface, forming a gate trench in the substrate, through the hard mask, depositing gate material in the gate trench, removing the hard mask to leave a gate structure, forming a source body contact trench having a trench wall and forming an anti-punch through implant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.