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    • 3. 发明公开
    • METHOD FOR PURIFYING DODECACARBONYL TRIRUTHENIUM
    • VERFAHREN ZUR REINIGUNG VON DODECACARBONYLTRIRUTHENIUM
    • EP3153473A1
    • 2017-04-12
    • EP15802466.1
    • 2015-06-02
    • Tanaka Kikinzoku Kogyo K.K.
    • NAKAGAWA, HirofumiISHIZAKA, TasukuISHIDA, HirofumiKUMAKURA, Akiko
    • C01G55/00C07F15/00C23C16/16
    • C01G55/008C01P2002/88C01P2006/80C07F15/00C23C16/16
    • An object of the present invention is to provide a purification method to give dodecacarbonyl triruthenium (DCR) which serves as a raw material for chemical vapor deposition and does not cause the contamination of a thin film with impurities even when used to form a ruthenium thin film. The present invention relates to a method in which the dissolved oxygen concentration in the solvent is made 0.2 mg/L or less in at least a dissolution stage, and an organic ruthenium compound including DCR as a raw material for chemical vapor deposition is purified by a recrystallization method. The present invention allows a trace amount of impurities to be separated from DCR. When a ruthenium thin film is formed by use of DCR thus obtained, the formed film is hardly contaminated with impurities. Additionally, the purification method of the present invention is also applicable for recovering/purifying DCR after being used for the formation of a ruthenium thin film.
    • 本发明的目的是提供一种提供用作化学气相沉积原料的十二羰基三钌(DCR)的纯化方法,即使在形成钌薄膜时也不会引起杂质的杂质污染 。 本发明涉及至少在溶解阶段将溶剂中的溶解氧浓度设定为0.2mg / L以下的方法,将包含作为化学气相沉积原料的DCR的有机钌化合物通过 重结晶法。 本发明允许微量的杂质与DCR分离。 当通过使用由此获得的DCR形成钌薄膜时,形成的膜几乎不被杂质污染。 此外,本发明的纯化方法也适用于在用于形成钌薄膜后回收/纯化DCR。