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    • 4. 发明授权
    • Silicon oxynitride cap for fluorinated silicate glass film in intermetal dielectric semiconductor fabrication
    • 用于氟化硅玻璃膜的氮氧化硅帽在金属间电介质半导体制造中
    • US06300672B1
    • 2001-10-09
    • US09120630
    • 1998-07-22
    • Gill Yong Lee
    • Gill Yong Lee
    • H01L2358
    • H01L21/02131H01L21/0214H01L21/02211H01L21/02274H01L21/02304H01L21/02362H01L21/3145H01L21/31629H01L21/76801H01L21/76802H01L21/76829H01L23/3192H01L23/5329H01L2924/0002H01L2924/12044H01L2924/00
    • A semiconductor device and method of forming a patterned conductive layer on a semiconductor substrate are provided so as to prevent fluorine substance outflow from a fluorinated silicate glass (FSG) layer thereon and simultaneously so as to suppress back reflection of light waves into a photoresist layer during photolithographic processing. The substrate is coated in turn with a conductive layer, a dielectric (e.g., silicon dioxide) liner, a FSG layer, a silicon oxynitride layer preventing fluorine substance outflow therethrough from the FSG layer and also forming an antireflective coating (ARC), and a photoresist layer. The photoresist layer is exposed and developed to uncover pattern portions of the underlying silicon oxynitride layer. The uncovered pattern portions of the silicon oxynitride ARC layer and corresponding underlying portions of the FSG layer and dielectric liner are then removed, e.g., by a single dry etching step, to expose pattern portions of the conductive layer for metallization. Upon metallization, the substrate is provided with a combination of the FSG layer and silicon oxynitride layer, in which the silicon oxynitride layer prevents fluorine substance outflow therethrough from the underlying FSG layer to an overlying conductive layer.
    • 提供半导体器件和在半导体衬底上形成图案化导电层的方法,以防止氟物质从其上的氟化硅酸盐玻璃(FSG)层流出,并同时抑制光波反射到光致抗蚀剂层中 光刻处理。 依次用导电层,电介质(例如,二氧化硅)衬垫,FSG层,氮氧化硅层涂覆衬底,防止氟物质从FSG层流出并形成抗反射涂层(ARC),以及 光致抗蚀剂层。 光致抗蚀剂层被曝光和显影以露出下面的氮氧化硅层的图案部分。 然后例如通过单次干蚀刻步骤去除氮氧化硅ARC层的未覆盖图案部分和FSG层和电介质衬垫的相应的下部,以暴露用于金属化的导电层的图案部分。 在金属化时,基板设置有FSG层和氮氧化硅层的组合,其中氧氮化硅层防止氟物质从下面的FSG层流出到上覆的导电层。