TWO TERMINAL MULTI-CHANNEL ESD DEVICE AND METHOD THEREFOR

摘要

PURPOSE: A two terminal multi-channel ESD device and method thereof is provided to be controlled from high voltage to low voltage since having a cramp voltage which is easily controlled in manufactured. CONSTITUTION: A semiconductor substrate(23) includes a first surface and a second surface while forming a first conductive type having first doping concentration. A first semiconductor layer(24) is formed on the first surface while having second doping concentration. A second semiconductor layer(25) is formed on the first surface of the first semiconductor layer while having a third doping concentration. A third semiconductor layer(35) is formed on the first surface of the second semiconductor layer while having a fourth doping concentration.