Patent ID: 7342282
Filing Date: 2008-03-11
Classification: H01L

Abstract:
1. A semiconductor device for electrostatic discharge protection, the semiconductor device comprising: a first semiconductor controlled rectifier having an anode connected to a first node and a cathode connected to a second node; a second semiconductor controlled rectifier having an anode connected to a third node and a cathode connected to the second node; and first and second diodes, the first diode being connected between the second node and the third node and the second diode being connected between the second node and the first node, wherein the first semiconductor controlled rectifier includes a first semiconductor region and a second semiconductor region; the second semiconductor controlled rectifier includes the first semiconductor region and the second semiconductor region; the first semiconductor region is associated with a first doping type; the second semiconductor region is associated with a second doping type different from the first doping type; the second semiconductor region is located directly on an insulating layer.