Patent ID: 6639277
Filing Date: 2003-10-28
Classification: H01L

Abstract:
A high voltage field-effect transistor (HVFET) comprising:a substrate of a first conductivity type; a first region of a second conductivity type; a source diffusion region of the second conductivity type disposed in the substrate spaced-apart from the first region to form an IGFET channel region therebetween; a drain diffusion region disposed in the first region; a first plurality of vertically spaced-apart buried layers of the first conductivity type disposed within the first region and spaced-apart from the drain diffusion region, the buried layers extending continuously across a portion of the first region to form an associated plurality of JFET channels in the first region, each of the buried layers having a length and a width the length being substantially greater than the width; an insulating layer disposed over the substrate; and a gate overlying an area of the insulating layer above the IGFET channel region.