第一介电层覆盖公共电极及扫描电极，并且包括凹槽形状的场集中单元。
A first dielectric layer covers the common electrodes and the scanning electrodes, and it includes groove shaped field concentration units.
每个内部晶体管单元(不是外围晶体管单元)还包括第一导电型的源区，其位于与凹槽相邻的体区中。
Interior transistor cells, but not the peripheral transistor cells, each further include a source region of the first conductivity type in the body region adjacent to the trench.
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