In accordance with one embodiment of the presently claimed invention, an electrostatic discharge protection structure with a diac includes one or more reference electrodes, a circuit electrode, {TAIL ~ a semiconductor material}, semiconductor regions and {HEAD ~ semiconductor wells} 
In accordance with one embodiment of the presently claimed invention , an electrostatic discharge protection structure with a diac includes one or more reference electrodes , a circuit electrode , { TAIL ~ a semiconductor material } , semiconductor regions and { HEAD ~ semiconductor wells }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD