Patent ID: 6326656
Filing Date: 2001-12-04
Classification: H01L

Abstract:
A lateral high-voltage transistor, comprising:a semiconductor body including a semiconductor substrate and an epitaxial layer, said semiconductor substrate being of a first conductivity type and having a first dopant concentration, said epitaxial layer being provided on said semiconductor substrate and being of a second conductivity type, said second conductivity type being opposite said first conductivity type;a MOSFET configuration including a drain terminal region and a source terminal region provided in said semiconductor body, and a gate terminal region;a semiconductor zone of said first conductivity type provided under said gate terminal region and being embedded in said epitaxial layer; andsaid epitaxial layer having trenches formed therein, said trenches having walls formed by said epitaxial layer, said walls being of said first conductivity type and having a second dopant concentration higher than said first dopant concentration, said trenches being organized in lines and rows between said source terminal region and said drain terminal region.