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    • 5. 发明申请
    • METHODS FOR FORMING A COMPOSITE PATTERN INCLUDING PRINTED RESOLUTION ASSIST FEATURES
    • 用于形成复合图案的方法,包括印刷分辨率辅助特征
    • US20090181330A1
    • 2009-07-16
    • US12013627
    • 2008-01-14
    • Allen H. GaborScott D. HalleHelen Wang
    • Allen H. GaborScott D. HalleHelen Wang
    • G03F7/20
    • H01L21/0337G03F7/70433G03F7/70466
    • An underlayer to be patterned with a composite pattern is formed on a substrate. The composite pattern is decomposed into a first pattern and a second pattern, each having reduced complexity than the composite pattern. A hard mask layer is formed directly on the underlying layer. A first photoresist is applied over the hard mask layer and lithographically patterned with the first pattern, which is transferred into the hard mask layer by a first etch. A second photoresist is applied over the hard mask layer. The second photoresist is patterned with the second pattern to expose portions of the underlying layer. The exposed portions of the underlying layer are etched employing the second photoresist and the hard mask layer, which contains the first pattern so that the composite pattern is transferred into the underlying layer.
    • 在基板上形成图案化复合图案的底层。 复合图案被分解为第一图案和第二图案,每个图案具有比复合图案更低的复杂度。 硬掩模层直接形成在下层上。 将第一光致抗蚀剂施加在硬掩模层上并用第一图案进行光刻图案化,其通过第一蚀刻转移到硬掩模层中。 在硬掩模层上施加第二光致抗蚀剂。 用第二图案对第二光致抗蚀剂进行图案化以暴露下层的部分。 使用包含第一图案的第二光致抗蚀剂和硬掩模层来蚀刻下层的暴露部分,使得复合图案被转移到下层中。