Patent ID: 7098522
Filing Date: 2006-08-29
Classification: H01L

Abstract:
1. A high voltage device with electrostatic discharge (ESD) protection, comprising: a substrate of a first conductive type; a well of a second conductive type in the substrate; a first doped region of the second conductive type in the substrate; a gate controlling the electrical connection of the first doped region and the well, wherein the gate, the first doped region, and the well make up a field effect transistor; a second doped region of the second conductive type in the well as a contact point thereof; and a third doped region of the first conductive type in the well between the second doped region and the gate, wherein the third doped region, the well, the substrate, and the first doped region constitute a parasitic semiconductor controlled rectifier (SCR), and the well and the third doped region are connected to a pad.