Patent ID: 8072029
Filing Date: 2011-12-06
Classification: H01L

Abstract:
1. A high voltage semiconductor device, comprising: a semiconductor substrate; a source region of a first conductivity type having an elongated projection with two sides and a rounded tip in the semiconductor substrate; a drain region of the first conductivity type laterally spaced from the source region in the semiconductor substrate; a gate electrode extending along the projection of the source region on the semiconductor substrate between the source and drain regions; a side floating region of a second conductivity type disposed between the source and drain regions along each of the two sides of the source region; and top floating regions of the second conductivity type contacting the side floating region, the top floating regions disposed between the source and drain regions in the shape of arched stripes extending along the rounded tip of the projection of the source region, the top floating regions being laterally spaced from one another by regions of the first conductivity type to thereby form alternating P-N regions along the lateral dimension.