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    • 72. 发明申请
    • STRUCTURES AND METHODS FOR PHOTO-PATTERNABLE LOW-k (PPLK) INTEGRATION
    • 用于可照片低k(PPLK)集成的结构和方法
    • US20110115094A1
    • 2011-05-19
    • US12619298
    • 2009-11-16
    • Maxime DarnonQinghuang Lin
    • Maxime DarnonQinghuang Lin
    • H01L23/48H01L21/768
    • H01L21/76804C08G77/04H01L21/02126H01L21/02318H01L21/31H01L21/76807H01L21/76814H01L21/76825H01L21/76826H01L21/76828H01L21/76829H01L21/76832H01L21/76835H01L23/5329H01L23/53295H01L2221/1031H01L2924/0002H01L2924/12044H01L2924/00
    • A single damascene or dual damascene interconnect structure fabricated with a photo-patternable low-k dielectric (PPLK) which is cured after etching. This interconnect method prevents the PPLK damage and the tapering of the edges of the interconnect structure. In one embodiment, the method of the present invention includes depositing a photo-patternable low-k (PPLK) material atop an initial structure. The initial structure can include a dielectric cap, an antireflective coating (ARC), or a material stack including the same. The at least one PPLK material is patterned, creating a single damascene structure. For dual damascene structures, a second PPLK layer is coated and patterned. An etch process is performed to transfer the pattern for the PPLK material into at least a portion of the substrate, typically into the dielectric cap and/or ARC using processes known by those skilled in the art (typically fluorocarbon-based plasmas). A diffusion liner deposition can follow the etch process. An electrically conductive material can also be deposited. The diffusion liner and the electrically conductive material can be polished using chemical mechanical polishing. The resulting structure is cured anytime after etching order to transform the resist like PPLK into a permanent low-k material that remains within the structure.
    • 用蚀刻后固化的光可图案化低k电介质(PPLK)制造的单镶嵌或双镶嵌互连结构。 这种互连方法防止了PPLK损坏和互连结构边缘的逐渐变细。 在一个实施例中,本发明的方法包括在初始结构的顶部沉积光可图案化的低k(PPLK)材料。 初始结构可以包括电介质盖,抗反射涂层(ARC)或包括其的材料堆叠。 至少一个PPLK材料被图案化,形成单个镶嵌结构。 对于双镶嵌结构,涂覆和图案化第二PPLK层。 执行蚀刻工艺以将PPLK材料的图案转移到基底的至少一部分中,通常使用本领域技术人员已知的方法(通常为氟碳基等离子体)进入电介质盖和/或ARC。 扩散衬垫沉积可以跟随蚀刻工艺。 还可以沉积导电材料。 扩散衬垫和导电材料可以使用化学机械抛光进行抛光。 所得到的结构在蚀刻之后随时固化,以将抗蚀剂如PPLK转变成保持在结构内的永久低k材料。