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    • 8. 发明授权
    • Method of chemical modification of structure topography
    • 结构形貌化学修饰方法
    • US06794290B1
    • 2004-09-21
    • US10004386
    • 2001-12-03
    • George D. PapasouliotisRobert D. Tas
    • George D. PapasouliotisRobert D. Tas
    • H01L21311
    • H01L21/02164C23C16/045H01L21/02274H01L21/31612H01L21/76224
    • A method is provided for filling high aspect ratio gaps without void formation by using a high density plasma (HDP) deposition process with a sequence of deposition and hydrogen etch steps. The first step uses an etch/dep ratio less than one to quickly fill the gap. The first step is interrupted before the opening to the gap is closed. The second step uses a hydrogen-based plasma to chemically etch the deposited material to widen the gap. The second step is stopped before corners of the elements forming the gaps are exposed. These steps can be repeated until the aspect ratio of the gap is reduced so that void-free gap-fill is possible. The etch/dep ratio and duration of each step can be optimized for high throughput and high aspect ratio gap-fill capacity.
    • 提供了一种用于通过使用具有一系列沉积和氢蚀刻步骤的高密度等离子体(HDP)沉积工艺来填充高纵横比间隙而无空隙形成的方法。 第一步使用小于1的蚀刻/剥离比快速填充间隙。 第一步在打开间隙之前中断。 第二步使用氢基等离子体来化学蚀刻沉积的材料以扩大间隙。 在形成间隙的元件的角部暴露之前停止第二步骤。 可以重复这些步骤,直到间隙的纵横比减小,使得无空隙间隙填充成为可能。 可以优化每个步骤的蚀刻/剥离比和持续时间,以实现高通量和高纵横比填充间隙。