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    • 5. 发明申请
    • Carbon-doped-Si oxide etch using H2 additive in fluorocarbon etch chemistry
    • 在碳氟化合物蚀刻化学中使用H2添加剂进行碳掺杂Si氧化物蚀刻
    • US20050266691A1
    • 2005-12-01
    • US11126053
    • 2005-05-09
    • Binxi GuGerardo DelgadinoYan YeMike Chen
    • Binxi GuGerardo DelgadinoYan YeMike Chen
    • B44C1/22H01L21/027H01L21/302H01L21/311H01L21/768
    • H01L21/31116H01L21/0276H01L21/31138H01L21/76802H01L21/76808H01L21/76829
    • Certain embodiments include an etching method including providing an etch material, applying a gas mixture including hydrogen, forming a plasma, and etching the etch material. The etch material can include a low-k dielectric material. The gas mixture can include a hydrogen gas, a hydrogen-free fluorocarbon, and a nitrogen gas, and further include one or more of a hydrofluorocarbon gas, an inert gas, and/or a carbon monoxide gas. The hydrogen gas can be a diatomic hydrogen, a hydrocarbon, a silane and/or a fluorine-free hydrogen gas, including H2, CH4, C2H4, NH3, and/or H2O gases. The hydrogen-free fluorocarbon gas can be a CxFy gas (where x≧1 and Y≧1) and the hydrofluorocarbon gas can be a CxHyFz gas (where x≧1, y≧1 and z≧1). The gas mixture can be free of oxygen. Embodiments can include reduced pressures, reduced hydrogen flow rates and one or more plasma frequencies.
    • 某些实施例包括蚀刻方法,包括提供蚀刻材料,施加包括氢气的气体混合物,形成等离子体,以及蚀刻蚀刻材料。 蚀刻材料可以包括低k电介质材料。 气体混合物可以包括氢气,无氢碳氟化合物和氮气,并且还包括氢氟烃气体,惰性气体和/或一氧化碳气体中的一种或多种。 氢气可以是双原子氢,烃,硅烷和/或无氟氢气,包括H 2,CH 4,C 2 H 4,NH 3和/或H 2 O 2气体。 无氢碳氟化合物气体可以是气体(其中x> = 1且Y> = 1),并且氢氟烃气体可以是C = 1,y> = 1,z> = 1)。 气体混合物可以没有氧气。 实施例可以包括减压,降低氢气流速和一个或多个等离子体频率。