Patent ID: 8125031

Claim:
A lateral double-diffused metal oxide semiconductor (LDMOS) device, comprising: a first well having a first conductive type disposed in a substrate having a second conductive type; a second well having a second conductive type disposed in the substrate and is adjacent to the first well; a first doped region having the first conductive type disposed in the first well; a second doped region having the first conductive type disposed in the second well; a field oxide layer disposed in the first well between the second doped region and the first doped region; a gate conductive layer disposed on the second well between the second doped region and the first doped region; a gate dielectric layer disposed between the gate conductive layer and the substrate; and a third doped region having the first conductive type disposed in the first well below a portion of the gate conductive layer, connected to the first doped region, and extending into a portion of the second well, wherein the second well between the doped region below the gate dielectric layer and the second doped region defines a channel region.