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    • 75. 发明授权
    • Method for fabricating air gap for semiconductor device
    • 制造半导体器件气隙的方法
    • US07803713B2
    • 2010-09-28
    • US11533809
    • 2006-09-21
    • Hsien-Wei ChenHsueh-Chung ChenShin-Puu Jeng
    • Hsien-Wei ChenHsueh-Chung ChenShin-Puu Jeng
    • H01L21/302H01L21/461
    • H01L21/7682H01L21/0206
    • A method for fabricating an interconnect structure in a semiconductor device. A masking layer is formed on a dielectric layer formed on a substrate, having at least one opening. The opening is transferred into the dielectric layer. A Plasma stripping process is performed to remove the masking layer, such that a damaged sidewall portion of the dielectric layer surrounding the opening therein is formed. The opening in the dielectric layer is filled with a conductive element. The damaged sidewall portion of the dielectric layer is removed to form a gap between the dielectric layer and the conductive element, wherein substances from removal of the damaged sidewall portion of the dielectric layer are formed on the conductive element. The substances are removed using a citric acid solution.
    • 一种在半导体器件中制造互连结构的方法。 在形成在基板上的电介质层上形成有至少一个开口的掩模层。 开口转移到电介质层中。 进行等离子体剥离处理以去除掩模层,从而形成围绕其中的开口的电介质层的受损侧壁部分。 电介质层中的开口填充有导电元件。 去除电介质层损坏的侧壁部分,以形成电介质层和导电元件之间的间隙,其中去除导电元件上介质层损坏的侧壁部分的物质。 使用柠檬酸溶液除去物质。