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    • 7. 发明公开
    • INSULATED GATE BIPOLAR TRANSISTOR AND MANUFACTURING METHOD THEREFOR
    • 绝缘栅双极型晶体管及其制造方法
    • EP3043387A1
    • 2016-07-13
    • EP14840868.5
    • 2014-08-25
    • CSMC Technologies Fab1 Co., Ltd.
    • ZHONG, ShengrongZHOU, DongfeiDENG, XiaosheWANG, Genyi
    • H01L29/739H01L21/331
    • H01L29/0623H01L21/761H01L29/045H01L29/0619H01L29/1095H01L29/16H01L29/1608H01L29/161H01L29/20H01L29/66333H01L29/6634H01L29/7395H01L29/7396
    • An insulated gate bipolar transistor (100) is provided. A substrate (10) of the insulated gate bipolar transistor (100) is of an N type. A P-type region (16) is disposed on a back of the N-type substrate. A back metal structure (18) is disposed on a back of the P-type region (16). A terminal protection ring is disposed in a terminal structure. A polysilicon gate (31) is disposed on a front surface of the substrate (10) in an active region. Sidewalls (72) are disposed at two sides of the polysilicon gate (31) on the substrate (10). An interlayer medium (81) covered with the polysilicon gate (31) and the sidewalls (72) are disposed on the substrate (10). The interlayer medium (81) is covered with a metal lead wire layer (91). An N-type carrier enhancement region (41) is disposed in the substrate (10) in the active region. A P-type body region (51) is disposed in the carrier enhancement region (41). An N-type heavily doped region (61) is disposed in the P-type body region (51). A P-type heavily doped region (71) is disposed in the N-type heavily doped region (61). An inward recessed shallow pit (62) with a depth of 0.15 to 0.3 micrometers is formed on a surface of the P-type heavily doped region (71). By disposing the carrier enhancement region (41), the carrier concentration of a channel can be increased and a forward voltage drop can be reduced; in addition, the shallow pit (62) can make a device obtain good impurity distribution and a large metal contact area, thereby improving the performance of the device.
    • 提供绝缘栅双极晶体管(100)。 绝缘栅双极型晶体管(100)的衬底(10)是N型的。 P型区域(16)设置在N型衬底的背面。 背面金属结构(18)设置在P型区域(16)的背面。 终端保护环设置在终端结构中。 多晶硅栅极(31)设置在衬底(10)的有源区中的前表面上。 侧壁(72)设置在衬底(10)上的多晶硅栅极(31)的两侧。 在衬底(10)上设置覆盖有多晶硅栅极(31)和侧壁(72)的层间介质(81)。 层间介质(81)被金属引线层(91)覆盖。 N型载流子增强区(41)设置在有源区中的衬底(10)中。 载波增强区(41)中设置有P型体区(51)。 N型重掺杂区(61)设置在P型体区(51)中。 P型重掺杂区(71)设置在N型重掺杂区(61)中。 在P型重掺杂区(71)的表面上形成深度为0.15至0.3微米的向内凹陷的浅坑(62)。 通过设置载流子增强区域(41),可以增加沟道的载流子浓度,并且可以降低正向压降; 此外,浅槽(62)可以使器件获得良好的杂质分布和大的金属接触面积,从而提高器件的性能。