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    • 5. 发明专利
    • Trench-gate-type power semiconductor element
    • TRENCH-GATE型功率半导体元件
    • JP2014038999A
    • 2014-02-27
    • JP2012269439
    • 2012-12-10
    • Samsung Electro-Mechanics Co Ltdサムソン エレクトロ−メカニックス カンパニーリミテッド.
    • SONG IN HYUKPARK JAE HOONSEO DONG SOO
    • H01L29/78H01L21/336H01L29/739
    • H01L29/7827H01L29/0696H01L29/41741H01L29/41766H01L29/41775H01L29/7397
    • PROBLEM TO BE SOLVED: To provide a trench-gate-type power semiconductor element capable of preventing an increase in contact resistance and preventing product breakage phenomenon due to passing a large-capacity current by preventing deviation of a current in one direction.SOLUTION: A trench-gate-type power semiconductor element 100 according to the present invention includes: a semiconductor substrate 110; a drift layer 120 formed on the semiconductor substrate 110; a well layer 130 formed on the drift layer 120; a trench 140 formed so as to penetrate through the well layer 130 in the thickness direction and to reach the drift layer 120; a first insulating film 141 formed from a bottom surface 140b of the trench 140 to a predetermined height; a first electrode 150 formed in the trench 140 with a height lower than the first insulating film 141; an interlayer insulating film 160 formed in the trench 140 to the same height as the first insulating film 141; and a second electrode 170 formed on the well layer 130, having a portion corresponding to the trench 140 that is protrudingly formed in the trench 140, and being in contact with the interlayer insulating film 160.
    • 要解决的问题:提供一种沟槽栅型功率半导体元件,其能够防止接触电阻增加,并且通过防止电流在一个方向上的偏移而使大容量电流通过而防止产品破损现象。解决方案:A 根据本发明的沟槽栅型功率半导体元件100包括:半导体衬底110; 形成在半导体衬底110上的漂移层120; 形成在漂移层120上的阱层130; 形成为在厚度方向上穿透阱层130并到达漂移层120的沟槽140; 由沟槽140的底面140b形成为预定高度的第一绝缘膜141; 形成在沟槽140内的第一电极150的高度低于第一绝缘膜141; 在沟槽140中形成与第一绝缘膜141相同高度的层间绝缘膜160; 以及形成在阱层130上的第二电极170,其具有对应于突出地形成在沟槽140中并与层间绝缘膜160接触的沟槽140的部分。