Patent ID: 8035159
Filing Date: 2011-10-11
Classification: H01L

Abstract:
1. A semiconductor power device comprising a trenched gate, opened from a top surface of a semiconductor substrate, surrounded by a source region encompassed in a body region near said top surface above a drain region disposed on a bottom surface of a said substrate, wherein said semiconductor power device further comprising: an implanting-ion block disposed above said top surface on a mesa area above said body region and in a middle portion between two of said trenched gates having a thickness for blocking body implanting ions from entering into said substrate under said mesa area whereby masks for manufacturing said semiconductor power device can be reduced; said body region constituting a merged body region merged from two separated body regions between two of said trenched gates having an inverted V pinnacle point near a bottom center of said body region between two of said trenched gates; and a bottom portion of said trenched gate is filled with a trench bottom block formed simultaneously with said implanting ion block by filling trenches of said trenched gates with a layer of said implanting ion block wherein said trench bottom block filled in said bottom portion of said trenched gate having a thickness from a bottom of said trenched gate substantially equal to an etch-down thickness in etching and removing said layer of said implanting ion-block from a top portion of said trenched gate and from peripheral areas surrounding a top surface of said trenched gate while leaving said implanting-ion block as an intact portion of said layer of said implanting ion block.