Patent ID: 6433368
Filing Date: 2002-08-13
Classification: H01L

Abstract:
A low-voltage triggering silicon-controlled rectifier (LVTSCR) formed in a semiconductor material of a first conductivity type, the semiconductor material having a dopant concentration, the LVTSCR comprising:a well of a second conductivity type formed in the semiconductor material, the well having a dopant concentration; a first region of the second conductivity type formed in the well, the first region having a dopant concentration greater than the dopant concentration of the well, the first region being connected to a first node; a second region of the first conductivity type formed in the well, the second region having a dopant concentration greater than the dopant concentration of the semiconductor material; a third region of the second conductivity type formed in the semiconductor material, the third region having a dopant concentration greater than the dopant concentration of the well, the third region being connected to a second node; a fourth region of the first conductivity type formed in the semiconductor material, the fourth region having a dopant concentration greater than the dopant concentration of the semiconductor material, a fifth region of the second conductivity type formed in the semiconductor material and the well, the fifth region having a dopant concentration greater than the dopant concentration of the well; and a diode connected to the second region and the first node.