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    • 10. 发明公开
    • SEMICONDUCTOR DEVICE AND SEMICONDUCTOR DEVICE MANUFACTURING METHOD
    • 半导体器件和半导体器件制造方法
    • EP2793267A1
    • 2014-10-22
    • EP13764095.9
    • 2013-03-15
    • Fuji Electric Co., Ltd.
    • MIZUSHIMA, Tomonori
    • H01L29/739H01L21/336H01L29/78
    • H01L21/3223H01L21/2636H01L21/304H01L21/324H01L29/0619H01L29/0834H01L29/36H01L29/66333H01L29/7395H01L29/8611
    • First and second n-type field stop layers (10a, 10b) are provided in an n - drift region (1) so as to come into contact with a p + collector layer. The first n-type field stop layer (10a) has an impurity concentration distribution in which impurity concentration is reduced toward an n + emitter region (3) at a steep gradient. The second n-type field stop layer (10b) has an impurity concentration distribution in which impurity concentration is reduced toward the n + emitter region (3) at a gentle gradient than that in the first n-type field stop layer (10a) and the impurity concentration of a peak position is less than that in the impurity concentration distribution of the first n-type field stop layer (10a). The impurity concentration distributions of the first and second n-type field stop layers (10a, 10b) have the same peak position. The first and second n-type field stop layers (10a, 10b) are formed using annealing and first and second proton irradiation processes which have the same projected range and different acceleration energy levels.
    • 第一和第二n型场截止层(10a,10b)设置在n-漂移区(1)中以便与p +集电极层接触。 第一n型场截止层(10a)具有杂质浓度分布,其中杂质浓度以陡峭的梯度朝着n +发射极区(3)减小。 第二n型场截止层(10b)具有杂质浓度分布,其中杂质浓度以平缓梯度朝着n +发射极区(3)减小,比第一n型场终止层(10a)和第 峰值位置的杂质浓度小于第一n型场终止层(10a)的杂质浓度分布中的杂质浓度。 第一和第二n型场终止层(10a,10b)的杂质浓度分布具有相同的峰值位置。 第一和第二n型场阻止层(10a,10b)使用具有相同投影范围和不同加速能级的退火和第一和第二质子照射过程形成。