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    • 7. 发明专利
    • Etching formulation for isotropic copper etching
    • 用于等压铜蚀刻的蚀刻配方
    • JP2011049508A
    • 2011-03-10
    • JP2009207571
    • 2009-09-08
    • Novellus Systems Incノベルス・システムズ・インコーポレーテッドNovellus Systems, Incorporated
    • MAYER STEVEN TWEBB ERIC
    • H01L21/306C23F1/18H01L21/308H01L21/3213
    • PROBLEM TO BE SOLVED: To provide a method of removing copper by isotropically etching the copper using a formulation and an isotropic copper etching formulation.
      SOLUTION: A formulation for isotropically etching copper contains an aqueous solution. The aqueous solution contains: (a) a complexing agent of a bidentate, tridentate or quadridentate selected from a group consisting of a diamine, a triamine, and a tetramine; and (b) an oxidizer. The pH of the aqueous solution is 5 to 12. In one embodiment, the etching solution contains ethylenediamine (EDA) and hydrogen peroxide at a pH of between about 6 and 10. Solutions capable of etching copper at high rates (e.g. at least about 1,000 Å/min) without roughening a substantial surface of the copper layer are provided. The formulation is particularly usefully used for removing copper from a semiconductor device of a semifinished product (e.g., for etching a copper loading part).
      COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:提供通过使用制剂和各向同性铜蚀刻制剂各向同性蚀刻铜来除去铜的方法。 解决方案:用于各向同性蚀刻铜的配方含有水溶液。 水溶液含有:(a)选自二胺,三胺和四胺的二齿,三齿或三齿的络合剂; 和(b)氧化剂。 水溶液的pH为5至12.在一个实施方案中,蚀刻溶液含有约6至10的pH下的乙二胺(EDA)和过氧化氢。能够高速蚀刻铜的溶液(例如至少约1,000 提供了不使粗糙的铜层表面粗糙化的/分钟。 该制剂特别有用地用于从半成品的半导体器件(例如,用于蚀刻铜负载部件)中去除铜。 版权所有(C)2011,JPO&INPIT