Patent ID: 6906357
Filing Date: 2005-06-14
Classification: H01L

Abstract:
1. An apparatus including an electrostatic discharge (ESD) protection structure with a diac, comprising: one or more reference electrodes; a circuit electrode; a semiconductor material of a first conductivity type in electrical communication with one or more of said one or more reference electrodes; a first semiconductor region of said first conductivity type disposed on said semiconductor material and in electrical communication with at least one of said one or more reference electrodes; a second semiconductor region of a second conductivity type disposed on said semiconductor material proximate said first semiconductor region and in electrical communication with said at least one of said one or more reference electrodes; a first semiconductor well of said second conductivity type disposed in said semiconductor material; a second semiconductor well of said second conductivity type disposed in said first semiconductor well; a third semiconductor well of said first conductivity type disposed in said second semiconductor well; a third semiconductor region of said first conductivity type disposed on said third semiconductor well and in electrical communication with said circuit electrode; and a fourth semiconductor region of said second conductivity type disposed on said third semiconductor well and in electrical communication with said circuit electrode.