Nonalloyed ohmic contacts to n-type Group III(a)-V(a) semiconductors
    1.
    发明授权
    Nonalloyed ohmic contacts to n-type Group III(a)-V(a) semiconductors 失效
    n型III族(a)-V(a)半导体的非合金欧姆接触

    公开(公告)号:US4186410A

    公开(公告)日:1980-01-29

    申请号:US919624

    申请日:1978-06-27

    摘要: A nonalloyed ohmic contact (110-112, 120-122) to an n-type Group III(a)-V(a) compound semiconductor body (102-104) is formed by epitaxially growing a Group III(a)-V(a) n.sup.++ -layer (106-108, 106'-108') doped to at least 10.sup.19 cm.sup.-3 between the semiconductor body and a metal contact layer (110-112). The metal layer forms an ohmic contact without requiring heating above the eutectic temperature. In order to avoid contamination of the metal-semiconductor interface, a metal contact layer (120-122) may be deposited in situ after MBE growth of the n.sup.++ -layer. This technique results in both a metal-semiconductor interface with smoother morphology and also an ohmic contact without heating above the eutectic temperature. These procedures are specifically described with reference to the fabrication of GaAs FETs.

    摘要翻译: 通过外延生长III族(a)-V(a)-V(a)-V(a)化合物半导体本体(102-104)的非合金欧姆接触(110-112,120-122) a)在半导体本体和金属接触层(110-112)之间掺杂至至少1019cm-3的n ++层(106-108,106'-108')。 金属层形成欧姆接触,而不需要高于共晶温度的加热。 为了避免金属 - 半导体界面的污染,金属接触层(120-122)可以在n ++层的MBE生长之后原位沉积。 该技术导致具有更平滑形态的金属 - 半导体界面以及不超过共晶温度的加热的欧姆接触。 参考GaAs FET的制造具体描述这些步骤。