Patent ID: 6465848
Filing Date: 2002-10-15
Classification: H01L

Abstract:
An electrostatic discharge protection device, comprising:a first well of a first conductive type; a second well of a second conductive type opposite to the first conductive type, contacting with the first well to form a junction; a MOS of the first conductive type, comprising: a control gate, positioned on the second well; a first drain/source region of the first conductive type, formed on the junction; and a second drain/source region of the first conductive type, formed on the second well and coupled to a first pad; a first doped region of the second conductive type, coupled to a second pad, formed on the first well and associated with the first well, the second well and the second drain/source region to construct a lateral semiconductor controlled rectifier (LSCR); a second doped region of the first conductive type, formed on the surface of the well and between the first doped region and the first drain/source region; and a dummy gate, positioned between the first drain/source region and the second doped region and on the first well.