Method for polishing cobalt-containing substrate

    公开(公告)号:US10077382B1

    公开(公告)日:2018-09-18

    申请号:US15450170

    申请日:2017-03-06

    摘要: The invention is a method for chemical mechanical polishing a semiconductor substrate having cobalt or cobalt alloy containing features containing Co0. The method mixes 0.1 to 2 wt % hydrogen peroxide oxidizing agent (α) into a slurry containing 0.5 to 3 wt % colloidal silica particles (β), the colloidal silica particles containing primary particles, 0.5 to 2 wt % complexing agent (γ) selected from at least one of L-aspartic acid, nitrilotriacetic acid, nitrilotri(methylphosphonic acid), ethylenediamine-N,N′-disuccinic acid trisodium salt, and ethylene glycol-bis (2aminoethylether)-N,N,N′,N′-tetraacetic acid, and balance water having a pH of 5 to 9 to create a polishing slurry for the semiconductor substrate. Oxidizing at least a surface portion of the Co0 to Co+3 of the semiconductor substrate to prevent runaway dissolution of the Co0 reduces polishing defects in the semiconductor substrate. Polishing the semiconductor substrate with a polishing pad removes the surface portion of the semiconductor substrate oxidized to Co+3.

    Electrolyte solution and electrochemical surface modification methods

    公开(公告)号:US09499919B2

    公开(公告)日:2016-11-22

    申请号:US14074103

    申请日:2013-11-07

    申请人: MetCon, LLC

    IPC分类号: C25F3/16 C25F1/00 C25F3/00

    CPC分类号: C25F3/16 C25F1/00 C25F3/00

    摘要: An aqueous electrolyte solution including a concentration of citric acid in the range of about 1.6 g/L to about 982 g/L and an effective concentration of ammonium bifluoride (ABF), and being substantially free of a strong acid. Methods of treating the surface of a non-ferrous metal workpiece include exposing the surface to a bath of an aqueous electrolyte solution including a concentration of citric acid less than or equal to about 300 g/L and a concentration of ammonium bifluoride greater than or equal to about 10 g/L, and having no more than about 3.35 g/L of a strong acid, controlling the temperature of the bath to be greater than or equal to about 54° C., connecting the workpiece to the anode of a DC power supply and immersing a cathode of the DC power supply in the bath, and applying a current across the bath.

    Electrochemical removal of tantalum-containing materials
    10.
    发明授权
    Electrochemical removal of tantalum-containing materials 有权
    电化学去除含钽材料

    公开(公告)号:US09068273B2

    公开(公告)日:2015-06-30

    申请号:US13157867

    申请日:2011-06-10

    摘要: A method of cleaning metal-containing deposits from a metal surface of a process chamber component includes immersing the metal surface in an electrochemical cleaning bath solution. A negative electrical bias is applied to the metal surface to electrochemically clean the metal-containing deposits from the metal surface. The cleaning method is capable of removing metal-containing deposits such as tantalum-containing deposits from the metal surface substantially without eroding the surface, and may be especially advantageous in the cleaning of components having textured surfaces.

    摘要翻译: 从处理室部件的金属表面清洗含金属沉积物的方法包括将金属表面浸入电化学清洗浴溶液中。 对金属表面施加负电偏压以电化学地从金属表面清洁含金属沉积物。 清洁方法能够从金属表面去除含金属沉积物如含钽沉积物,而不会侵蚀表面,并且在清洁具有纹理表面的部件方面特别有利。