Improved 20 V lateral trench gate power MOSFETs with very low on-resistance of 7.8 m/spl Omega//spl middot/mm/sup 2/

We propose an improved lateral trench gate MOSFET with a new trench drain contact. The device is predicted to achieve 25 V breakdown voltage and a very low on-resistance of 7.8 m/spl Omega//spl middot/mm/sup 2/, which is by 20% lower than that of previously proposed standard lateral trench gate MOSFETs. The proposed trench contact uniformly distributes the electron current in the drift layer, and effectively reduces the device on-resistance. In the present paper, we also show the detailed electrical characteristics of the fabricated standard trench gate LDMOS. The large current turn-off capability of 1.1/spl times/10/sup 4/ A/cm/sup 2/ was achieved by the fabricated device.