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    • 4. 发明授权
    • Method of etching silicon nitride film
    • 蚀刻氮化硅膜的方法
    • US5756402A
    • 1998-05-26
    • US426693
    • 1995-04-24
    • Sadayuki JimboTokuhisa OhiwaHaruki MoriAkira KobayashiTadashi ShinmuraYasuyuki Taniguchi
    • Sadayuki JimboTokuhisa OhiwaHaruki MoriAkira KobayashiTadashi ShinmuraYasuyuki Taniguchi
    • H01L21/311H01L21/302
    • H01L21/31116
    • A method for etching a silicon nitride film, includes the steps of supplying a fluorine radical, a compound of fluorine and hydrogen, and an oxygen radical close to a substrate having the silicon nitride film, and selectively etching the silicon nitride film from the substrate with the fluorine radical, the compound of fluorine and hydrogen, and the oxygen radical. A method for etching a silicon nitride film, includes the steps of exciting gas containing fluorine and oxygen gas, thereby generating a fluorine radical and an oxygen radical, supplying the fluorine radical and the oxygen radical close to a substrate having the silicon nitride film and supplying gas of a compound containing a hydroxyl close to the substrate, reacting the fluorine radical, the oxygen radical and the compound containing the hydroxyl, thereby generating a compound of the fluorine radical, the oxygen radical and a compound of fluorine and hydrogen, and selectively etching the silicon nitride film from the substrate with the compound of the fluorine radical, the oxygen radical and the compound of fluorine and hydrogen.
    • 一种用于蚀刻氮化硅膜的方法包括以下步骤:在具有氮化硅膜的衬底附近提供氟基,氟和氢的化合物和氧自由基,并从衬底中选择性地蚀刻氮化硅膜, 氟自由基,氟和氢的化合物和氧自由基。 一种用于蚀刻氮化硅膜的方法包括以下步骤:激发含氟和氧气的气体,从而产生氟基和氧自由基,将氟自由基和氧自由基靠近具有氮化硅膜的基板并供应 含有靠近底物的羟基化合物的气体,使氟自由基,氧自由基和含有羟基的化合物反应,从而产生氟自由基,氧自由基和氟和氢的化合物的化合物,并选择性地蚀刻 来自衬底的氮化硅膜与氟自由基,氧自由基以及氟和氢的化合物组成。