Source electrode evolution of a low voltage power MOSFET under avalanche cycling

✍ Scribed by B. Bernoux; R. Escoffier; P. Jalbaud; J.M. Dorkel

• Book ID: 104058052
• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 722 KB
• Volume: 49
• Category: Article
• ISSN: 0026-2714
• DOI: 10.1016/j.microrel.2009.06.035

✦ Synopsis

This paper presents the impact of high current repetitive avalanche pulses on a low voltage vertical power MOSFET at high temperature. Measurements show that R DSon decreases with the number of avalanche cycles whereas other electrical parameters stay constant. A simple model proposed in this paper shows that R DSon measurements are linked to MOSFET source electrode evolution. Also once source electrode has aged standard R DSon measurements at high current using force and sense are no more representative of silicon on resistance.