Patent ID: 6621122
Filing Date: 2003-09-16
Classification: H01L

Abstract:
A termination for a superjunction MOSFET, said superjunction MOSFET comprising a silicon die having an active area and a termination area surrounding said active area; said active area comprising an Nâˆ’ depletion region and a plurality of spaced identical P type pylons of a first diameter extending into said Nâˆ’ depletion area; the total charge of said p type pylons being essentially equal to that of said Nâˆ’ depletion region so that both are depleted when blocking voltage is applied to said device; a MOSgate structure formed atop each of said pylons; said termination area comprising a plurality of spaced parallel P type pylons extending through a continuation of said Nâˆ’ depletion region; the total charge balance between said pylons in said termination area and said continuation of said Nâˆ’ depletion region being negative.