Patent ID: 6207994
Filing Date: 2001-03-27
Classification: H01L

Abstract:
A high voltage field-effect transistor (HVFET) comprising:a substrate of a first conductivity type;a source diffusion region of a second conductivity type disposed in the substrate, the source diffusion region having a source fingertip area;a first region of the second conductivity type disposed in the substrate spaced-apart from the source diffusion region with an IGFET channel region being formed therebetween, the first region having a pair of drain fingertips areas inter-digitated with the source fingertip area;a drain diffusion region of the second conductivity type disposed in the first region;a buffer area formed between the source diffusion region and the first region adjacent the source fingertip area, the buffer area being substantially wider than the IGFET channel region;an insulated gate disposed above the IGFET channel region; a plurality of buried layers of the first conductivity type disposed within the first region, the buried layers forming an associated plurality of JFET conduction channels in the first region.