SEMICONDUCTOR DEVICE
- 申请公布号:
- JP2016207876(A)
- 申请号:
- JP20150089006
- 申请日期:
- 2015.04.24
- 申请公布日期:
- 2016.12.08
- 申请人:
- FUJI ELECTRIC CO LTD
- 发明人:
- ONISHI YASUHIKO
- 分类号:
- H01L29/786
- 主分类号:
- H01L29/786
- 摘要:
- PROBLEM TO BE SOLVED: To provide a semiconductor device capable of reducing on-resistance.SOLUTION: A semiconductor device includes, in a surface layer of a parallel pn layer 5, a source part and a drain part of a planar gate structure, which are provided at a distance from each other. A p-type base region 6 and an ntype source region 7 of the source part, and an ntype drain region 10 of the drain part are arranged in a linear planar layout which extends the same first direction x. The parallel pn layer 5 is composed of n-type drift regions 3 and p-type partition regions 4, which are alternately and repeatedly arranged one by one in the first direction x. In the source part, a trench gate structure composed of a trench 20, a second gate insulation film 21 and a second gate electrode 22 is provided. The trench 20 pierces the p-type base region 6 and the ntype source region 7 to reach the n-type drift region 3 of the parallel pn layer 5. A width d2 of the trench 20 in the first direction x is narrower than a repetition pitch Dof the n-type drift region 3 and the p-type partition region 4.SELECTED DRAWING: Figure 1
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