Patent ID: 9230954
Filing Date: 2016-01-05
CPC Classification: H01L

Claim Text:
1. A Lateral Diffused N-type Metal Oxide Semiconductor (LDNMOS) device for an ESD protection structure, comprising: a substrate of a first conductivity type; an ILD disposed on the substrate; a deep N-well region of a second conductivity type, disposed in the substrate; a P-body region of the first conductivity type, disposed in the substrate; a first doped region of the second conductivity type, disposed in the deep N-well region, the first doped region defines a first diffusion area on the top thereof; a second doped region of the second conductivity type, disposed in the P-body region; a third doped region of the first conductivity type, disposed in the P-body region; a Poly gate electrode, disposed in the ILD, and disposed between the first doped region and the second doped region; a first isolation structure, disposed between the Poly gate electrode and the first doped region; a first contact portion, disposed in the ILD, connecting to the first diffusion area of the first doped region; and a first metal portion disposed above the first doped region, connecting to the first contact portion; wherein there is an overlap between the first isolation structure and the first metal portion, the direction of the overlap is parallel to the direction of channel length.