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    • 25. 发明授权
    • Post-planarization densification
    • 后平面化致密化
    • US08466067B2
    • 2013-06-18
    • US13043131
    • 2011-03-08
    • Jingmei LiangNitin K. IngleShankar Venkataraman
    • Jingmei LiangNitin K. IngleShankar Venkataraman
    • H01L21/311
    • H01L21/02164H01L21/02337H01L21/3105H01L21/31055H01L21/316H01L21/76229
    • Processes for forming high density gap-filling silicon oxide on a patterned substrate are described. The processes increase the density of gap-filling silicon oxide particularly in narrow trenches. The density may also be increased in wide trenches and recessed open areas. The densities of the gap-filling silicon oxide in the narrow and wide trenches/open areas become more similar following the treatment which allows the etch rates to match more closely. This effect may also be described as a reduction in the pattern loading effect. The process involves forming then planarizing silicon oxide. Planarization exposes a new dielectric interface disposed closer to the narrow trenches. The newly exposed interface facilitates a densification treatment by annealing and/or exposing the planarized surface to a plasma.
    • 描述了在图案化衬底上形成高密度间隙填充氧化硅的工艺。 这些工艺增加了间隙填充氧化硅的密度,特别是在狭窄的沟槽中。 在宽的沟槽和凹入的开放区域中,密度也可以增加。 狭缝和宽沟槽/开放区域中填充间隙的氧化硅的密度在处理之后变得更加相似,这允许蚀刻速率更紧密地匹配。 这种效果也可以被描述为模式加载效应的降低。 该方法涉及形成二氧化硅平坦化。 平面化暴露出更靠近窄沟槽设置的新介质界面。 新暴露的界面通过将平坦化表面退火和/或暴露于等离子体来促进致密化处理。