Patent ID: 6259134
Filing Date: 2001-07-10
Classification: H01L

Abstract:
A MOS-controllable power semiconductor trench device, comprising: a semiconductor body having a first surface and a second surface; a trench having a gate extending into said first surface of the body, the gate being at a predetermined electrical potential; a thyristor structure located between said first surface and said second surface of the body; an accumulation layer formed at a wall of the trench by the predetermined potential on the gate; a PIN diode electrically in parallel with said thyristor, said accumulation layer forming part of said PIN diode, the trench always terminating short of a base portion of said thyristor to protect the trench against high electric field breakdown when the device is in a non-conductive state; and wherein conduction of said PIN diode is arranged to trigger said thyristor into a conductive state.