Oxide and metal removal
    2.
    发明授权

    公开(公告)号:US10465294B2

    公开(公告)日:2019-11-05

    申请号:US15095342

    申请日:2016-04-11

    Abstract: Methods are described herein for etching metal films which are difficult to volatize. The methods include exposing a metal film to a chlorine-containing precursor (e.g. Cl2). Chlorine is then removed from the substrate processing region. A carbon-and-nitrogen-containing precursor (e.g. TMEDA) is delivered to the substrate processing region to form volatile metal complexes which desorb from the surface of the metal film. The methods presented remove metal while very slowly removing the other exposed materials. A thin metal oxide layer may be present on the surface of the metal layer, in which case a local plasma from hydrogen may be used to remove the oxygen or amorphize the near surface region, which has been found to increase the overall etch rate.

    Methods of etching films comprising transition metals
    6.
    发明授权
    Methods of etching films comprising transition metals 有权
    蚀刻包含过渡金属的膜的方法

    公开(公告)号:US09390940B2

    公开(公告)日:2016-07-12

    申请号:US14206474

    申请日:2014-03-12

    Abstract: Provided are methods for etching films comprising transition metals. Certain methods involve activating a substrate surface comprising at least one transition metal, wherein activation of the substrate surface comprises exposing the substrate surface to heat, a plasma, an oxidizing environment, or a halide transfer agent to provide an activated substrate surface; and exposing the activated substrate surface to a reagent comprising a Lewis base or pi acid to provide a vapor phase coordination complex comprising one or more atoms of the transition metal coordinated to one or more ligands from the reagent. Certain other methods provide selective etching from a multi-layer substrate comprising two or more of a layer of Co, a layer of Cu and a layer of Ni.

    Abstract translation: 提供了用于蚀刻包含过渡金属的膜的方法。 某些方法包括激活包含至少一种过渡金属的基底表面,其中基底表面的活化包括将基底表面暴露于加热,等离子体,氧化环境或卤化物转移剂以提供活化的基底表面; 以及将活化的底物表面暴露于包含路易斯碱或pi酸的试剂中,以提供包含一个或多个与试剂配位的一个或多个配体配位的过渡金属原子的气相配位络合物。 某些其它方法提供了选自多层衬底的选择性蚀刻,所述多层衬底包括Co层,Cu层和Ni层中的两层或多层。

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