HIGH FIDELITY PATTERNING EMPLOYING A FLUOROHYDROCARBON-CONTAINING POLYMER
    1.
    发明申请
    HIGH FIDELITY PATTERNING EMPLOYING A FLUOROHYDROCARBON-CONTAINING POLYMER 有权
    使用含氟聚合物聚合物的高清晰度图案

    公开(公告)号:US20130108833A1

    公开(公告)日:2013-05-02

    申请号:US13281749

    申请日:2011-10-26

    Abstract: A stack of a hard mask layer, a soft mask layer, and a photoresist is formed on a substrate. The photoresist is patterned to include at least one opening. The pattern is transferred into the soft mask layer by an anisotropic etch, which forms a carbon-rich polymer that includes more carbon than fluorine. The carbon-rich polymer can be formed by employing a fluorohydrocarbon-containing plasma generated with fluorohydrocarbon molecules including more hydrogen than fluorine. The carbon-rich polymer coats the sidewalls of the soft mask layer, and prevents widening of the pattern transferred into the soft mask. The photoresist is subsequently removed, and the pattern in the soft mask layer is transferred into the hard mask layer. Sidewalls of the hard mask layer are coated with the carbon-rich polymer to prevent widening of the pattern transferred into the hard mask.

    Abstract translation: 在基板上形成硬掩模层,软掩模层和光致抗蚀剂的堆叠。 图案化光致抗蚀剂以包括至少一个开口。 该图案通过各向异性蚀刻转移到软掩模层中,其形成包含比氟更多的碳的富碳聚合物。 富含碳的聚合物可以通过使用包含比氟更多的氢的氟代烃分子产生的含氟代烃等离子体形成。 富含碳的聚合物涂覆软掩模层的侧壁,并且防止转移到软掩模中的图案的加宽。 随后去除光致抗蚀剂,并将软掩模层中的图案转移到硬掩模层中。 用富含碳的聚合物涂覆硬掩模层的侧壁以防止转移到硬掩模中的图案变宽。

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