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    • 10. 发明授权
    • Enhanced lithographic resolution through double exposure
    • 通过双重曝光增强光刻分辨率
    • US07256873B2
    • 2007-08-14
    • US10765218
    • 2004-01-28
    • Jozef Maria FindersDonis George FlagelloSteven George Hansen
    • Jozef Maria FindersDonis George FlagelloSteven George Hansen
    • G03B27/32G03B27/42G03B27/54
    • G03F7/70433G03F7/70466
    • A system and method for enhancing the image resolution in a lithographic system, is presented herein. The invention comprises decomposing a reticle pattern into at least two constituent sub-patterns that are capable of being optically resolved by the lithographic system, coating a substrate with a pre-specified photoresist layer, and exposing a first of the at least two constituent sub-patterns by directing a projection beam through the first sub-pattern such that the lithographic system produces a first sub-pattern image onto the pre-specified photoresist layer of the substrate. The invention further comprises processing the exposed substrate, exposing a second of the at least two constituent sub-patterns by directing the projection beam through the second sub-pattern such that the lithographic system produces a second sub-pattern image onto the pre-specified photoresist layer of the substrate, and then combining the first and second sub-pattern images to produce a desired pattern on the substrate.
    • 本文给出了用于增强光刻系统中的图像分辨率的系统和方法。 本发明包括将掩模版图案分解为能够被光刻系统光学分辨的至少两个构成子图案,用预定的光致抗蚀剂层涂覆基底,以及暴露至少两个构成子图案中的第一个, 通过将投影光束引导通过第一子图案使得光刻系统在基板的预定光致抗蚀剂层上产生第一子图案图像。 本发明还包括处理曝光的基板,通过将投影光束引导通过第二子图案来暴露至少两个构成子图案中的第二个,使得光刻系统在预定的光致抗蚀剂上产生第二子图案图像 层,然后组合第一和第二子图案图像以在衬底上产生期望的图案。