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    • 8. 发明授权
    • Method of manufacturing semiconductor device and semiconductor device
    • 制造半导体器件和半导体器件的方法
    • US06509648B1
    • 2003-01-21
    • US09691030
    • 2000-10-19
    • Noboru MorimotoMasazumi MatsuuraKinya Goto
    • Noboru MorimotoMasazumi MatsuuraKinya Goto
    • H01L2144
    • H01L21/76819
    • A method of manufacturing a semiconductor device is obtained which is capable of evading generation of a short circuit between wirings in an upper wiring layer even if a part of an upper surface of an FSG film is exposed by variations in a production step. After a USG film (4) is deposited to a thickness of 1 Hm over an entire surface of an FSG film (3), the USG film (4) is polished and removed by a thickness of 900 nm from an upper surface thereof by the CMP method. At this time, part of an upper surface of the FSG film (3) is exposed by variations in a production step. Next, the surface of the interlayer dielectric film (50) is cleaned with a cleaning liquid whose etching rate to the FSG film (3) and etching rate to the USG film (5) are substantially the same. Such a cleaning liquid may be, for example, an ammonia hydrogen peroxide mixture of NH4OH:H2O2:H2O=1:1:20. The structure shown in FIG. 5 is dipped in the above-mentioned ammonia hydrogen peroxide mixture for 60 seconds to clean the surface of the interlayer dielectric film (50).
    • 获得制造半导体器件的方法,即使通过制造步骤的变化使FSG膜的上表面的一部分露出,也能够避免在上布线层中的布线之间的短路的产生。 在USG膜(4)在FSG膜(3)的整个表面上沉积厚度为1m的USG膜(4)之后,将USG膜(4)从其上表面抛光并去除900nm的厚度, CMP方法。 此时,FSG膜(3)的上表面的一部分通过生产步骤的变化而暴露。 接下来,用对FSG膜(3)的蚀刻速率和对USG膜(5)的蚀刻速率基本相同的清洗液清洁层间绝缘膜(50)的表面。 这样的清洗液可以是例如NH 4 OH:H 2 O 2 :H 2 O = 1:1:20的氨过氧化氢混合物。 图1所示的结构 5浸渍在上述氨过氧化氢混合物中60秒以清洁层间电介质膜(50)的表面。