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    • 3. 发明专利
    • Diode and power conversion system
    • 二极管和功率转换系统
    • JP2014053451A
    • 2014-03-20
    • JP2012196885
    • 2012-09-07
    • Hitachi Power Semiconductor Device Ltd株式会社 日立パワーデバイス
    • ISHIMARU TETSUYAMORI MUTSUHIRO
    • H01L29/861H01L21/329H01L29/06H01L29/868
    • H01L29/8611H01L29/36H01L29/66128H01L29/66136H01L29/66143H01L29/872
    • PROBLEM TO BE SOLVED: To provide a diode capable of reducing a recovery loss by an easy method in which there is no additional process without being accompanied with reduction in withstand voltage.SOLUTION: A diode includes: an n-type ndrift layer 101; a p-type anode p-layer 102 adjacent to the ndrift layer 101; an n-type cathode n-layer 104 which is provided adjacent to an anode side of the ndrift layer 101 and higher in n-type impurity concentration than the ndrift layer 101; an anode electrode 107 in ohmic-connected with the anode p-layer 102; and a cathode electrode 108 in ohmic-connected with the cathode n-layer 101. In a position located between the ndrift layer 101 and the cathode n-layer 104 and adjacent to the cathode n-layer 104, a low lifetime region layer 106 is provided which contains impurities of the same kinds as n-type impurities contained in the cathode n-layer 104 and has a lower carrier lifetime than the cathode n-layer 104.
    • 要解决的问题:提供一种能够通过简单的方法来减少回收损耗的二极管,其中不存在附加工艺而不伴随着耐电压降低。解决方案:二极管包括:n型n驱动层101; 与n型层101相邻的p型阳极p层102; 与n型层101的阳极侧相邻设置的n型阴极n层104,n型杂质浓度高于n型层101。 与阳极p层102欧姆连接的阳极电极107; 以及与阴极n层101欧姆连接的阴极电极108.在n层层101和阴极n层104之间并且与阴极n层104相邻的位置中,低寿命区域层106 其包含与阴极n层104中所含的n型杂质相同的杂质,并且具有比阴极n层104低的载流子寿命。