In-situ contactless monitoring of photomask pellicle degradation

    公开(公告)号:US10161915B2

    公开(公告)日:2018-12-25

    申请号:US14932372

    申请日:2015-11-04

    Abstract: A method and apparatus for detecting changes in the vibrational mode spectra and/or elasticity of a pellicle without reliance upon visual inspection are provided. Embodiments include providing a pellicle, a lower surface of the pellicle attached to a photomask; directing light from a light source onto an upper surface of the pellicle at an angle to the upper surface; causing a deflection of the pellicle concurrently with the light being directed onto the pellicle; detecting light reflected off of the deflected pellicle; and characterizing a vibrational mode of the pellicle based on the detection.

    Reticle defect correction by second exposure
    5.
    发明授权
    Reticle defect correction by second exposure 有权
    通过第二次曝光进行掩模版缺陷校正

    公开(公告)号:US09005882B2

    公开(公告)日:2015-04-14

    申请号:US14275688

    申请日:2014-05-12

    Inventor: Arthur Hotzel

    Abstract: Correction of reticle defects, such as EUV reticle defects, is accomplished with a second exposure. Embodiments include obtaining a reticle with a first pattern corresponding to a design for a wafer pattern, detecting dark defects and/or design/OPC weak spots in the first pattern, exposing a resist covered wafer using the reticle, and exposing the wafer using a second reticle with a second pattern or a second image field with openings corresponding to the dark defects, with a repair pattern on the reticle or on another reticle, or with a programmed e-beam or laser writer.

    Abstract translation: 修正掩模版缺陷,例如EUV掩模版缺陷,是通过第二次曝光来完成的。 实施例包括获得具有对应于晶片图案的设计的第一图案的掩模版,检测第一图案中的暗缺陷和/或设计/ OPC弱点,使用掩模版曝光抗蚀剂覆盖的晶片,以及使用第二图案曝光晶片 具有第二图案的掩模版或具有对应于暗缺陷的开口的第二图像场,在掩模版或另一掩模版上具有修复图案,或者与编程的电子束或激光写入器。

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