Reduced dark current pin photo diodes using intentional doping
    1.
    发明授权
    Reduced dark current pin photo diodes using intentional doping 有权
    使用有意义的掺杂减少暗电流引脚光电二极管

    公开(公告)号:US06573581B1

    公开(公告)日:2003-06-03

    申请号:US09762487

    申请日:2001-02-07

    IPC分类号: H01L2978

    摘要: In a semiconductor p-i-n photodiode an undoped absorption region (10) is epitaxially grown between two highly doped regions (14, 16). In prior art lattice matched InGaAs p-i-n photodiodes current epitaxial structures use low InP cap (16) doping (n˜2.5−6×1016/cm3), and nominally undoped (not intentionally doped, n˜1×1013−5×1014/cm3) InGaAs absorption regions (10). The shunt resistances of p-i-n photodiodes according to the present invention with intentional doping between n˜5×1017/cm3 and 1×1014/cm3, in the InGaAs absorption region (52, 60) are significantly increased over that of a standard structure (non-intentionally doped).

    摘要翻译: 在半导体p-i-n光电二极管中,未掺杂的吸收区域(10)在两个高掺杂区域(14,16)之间外延生长。 在现有技术的晶格匹配的InGaAs pin光电二极管中,电流外延结构使用低InP帽(16)掺杂(n〜2.5-6×1016 / cm3),并且名义上未掺杂(非有意掺杂,n〜1×10 13 -5×10 14 / cm 3)的InGaAs吸收区域 )。 根据本发明的pin光电二极管的分流电阻在InGaAs吸收区域(52,60)中有意掺杂在n = 5×10 17 / cm 3和1×10 14 / cm 3之间的分流电阻显着地比标准结构(非有意掺杂) 。