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    • 2. 发明授权
    • Method and apparatus for redressing defective photomask
    • 用于纠正有缺陷的光掩模的方法和装置
    • US4463073A
    • 1984-07-31
    • US394642
    • 1982-07-01
    • Tateoki MiyauchiKatsuro MizukoshiMikio HongoMasao MitaniMasaaki OkunakaTakao KawanabeIsao Tanabe
    • Tateoki MiyauchiKatsuro MizukoshiMikio HongoMasao MitaniMasaaki OkunakaTakao KawanabeIsao Tanabe
    • G03F1/00G03F1/72H01L21/027H01L21/30G03F9/00
    • G03F1/72H01L21/30Y10S430/139Y10S430/146
    • A method and apparatus for repairing defect portions of a photomask. A complex material from which a light shading material can be deposited is applied over the photomask. A white (blank) defect region is irradiated with a continuous wave laser light beam projected in a slit-like light image to thereby convert the complex material into the shading material. After washing, a half-deposited portion formed in a peripheral portion of the light shading region is further deposited by a post-baking process. Those portions of the light shading film which depart from the desired mask pattern are removed together with black (solid) defect portion originally present in the photomask through irradiation with a pulse laser light beam. The pulse laser is constituted by a Dye-laser, while the continuous wave laser is constituted by an Ar-laser. A specific half-mirror which transmits therethrough Ar-laser light while reflecting Dye-laser light is displaceable provided. The white and the black defects are selectively centered on a same optical axis of an optical projection system including a slit and a condenser lens, whereby the white and the black defect portions are each removed through irradiation with the associated laser light projected thereto in a slit-like light image through the same optical projection system.
    • 一种用于修复光掩模的缺陷部分的方法和装置。 将光阴影材料沉积的复合材料施加在光掩模上。 用投影在狭缝状光图像中的连续波激光束照射白色(空白)缺陷区域,从而将复合材料转换成遮光材料。 洗涤后,通过后烘烤处理进一步沉积形成在遮光区域的周边部分中的半沉积部分。 通过照射脉冲激光,与原来存在于光掩模中的黑色(实心)缺陷部分一起除去遮光膜的偏离所需掩模图案的那些部分。 脉冲激光由染料激光器构成,而连续波激光由Ar激光器构成。 通过反射染料激光而透过其的Ar激光的特定半反射镜是可置换的。 白色和黑色缺陷选择性地集中在包括狭缝和聚光透镜的光学投影系统的相同光轴上,由此白色和黑色缺陷部分通过照射投射到狭缝中的相关激光而被去除 类似的光图像通过相同的光学投影系统。