Patent ID: 6664595
Filing Date: 2003-12-16
Classification: H01L

Abstract:
A power MOSFET comprising:a drain region formed of a semiconductor substrate of a first conductivity type; a drift region formed on the drain region, having the same conductivity type as the drain region; a gate insulating layer on the drift region, having a plurality of openings spaced apart from each other by a predetermined distance, the plurality of openings partially exposing the drift region; a gate electrode formed on the gate insulating layer and having a plurality of openings which are aligned with the openings of the gate insulating layer; a plurality of body regions of a second conductivity type, each body region being formed in the drift region beneath a corresponding opening, and each body region having first portion coincident with the corresponding opening and a plurality of side portions surrounding the first portion and overlapped by the gate electrode, wherein the plurality of side portions include at least two first side portions have a channel formed in them, and at least two second side portions do not have a channel formed in them; a plurality of H-shaped source regions, each H-shaped source region being formed in a corresponding body region, each H-shaped source region including a plurality of first source regions each shaped in the form of a strip, each of the plurality of first source regions contacting one of said first side portions of the corresponding body region, and a second source region connecting the first source regions; a source electrode electrically connected to the source region; and a drain electrode electrically connected to the drain region.