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    • 9. 发明授权
    • Exposure method, exposure apparatus, and mask
    • 曝光方法,曝光装置和面罩
    • US06204912B1
    • 2001-03-20
    • US08848394
    • 1997-05-08
    • Makoto TsuchiyaKei NaraNobutaka FujimoriManabu ToguchiMasami Seki
    • Makoto TsuchiyaKei NaraNobutaka FujimoriManabu ToguchiMasami Seki
    • G03B2742
    • G03F7/70066G03F7/70275G03F7/70283G03F7/70358G03F7/70475G03F7/70791
    • An exposure method, exposure apparatus and mask are suitable for manufacturing an active matrix liquid crystal display including, for example, a gate electrode layer and a source/drain electrode layer. A stitching portion between unit patterns in a second layer is offset from the stitching portion in a first layer by a predetermined distance. The stitching portions of the second layer are always positioned over unit patterns of the first layer. Accordingly, the contrast gap that occurs at the stitching portion as a boundary is defined only by an error in the exposure position of the second layer. The contrast gap is not affected by an error in the exposure position of the first layer, unlike the conventional method. Because the contrast gap caused by the error in the exposure position of the first layer is eliminated, the total contrast gap that occurs at the stitching portion as a boundary is significantly reduced.
    • 曝光方法,曝光装置和掩模适用于制造包括例如栅极电极层和源极/漏极电极层的有源矩阵液晶显示器。 第二层中的单元图案之间的缝合部分在第一层中与缝合部分偏移预定距离。 第二层的缝合部分总是位于第一层的单位图案之上。 因此,在作为边界的缝合部分发生的对比度间隙仅由第二层的曝光位置的误差限定。 与传统方法不同,对比度间隙不受第一层的曝光位置的误差的影响。 由于消除了由第一层的曝光位置的误差引起的对比度间隙,所以在作为边界的缝合部分发生的总对比度间隙显着减小。
    • 10. 发明授权
    • Projection exposure apparatus and method having a positional deviation
detection system that employs light from an exposure illumination system
    • 具有使用来自曝光照明系统的光的位置偏差检测系统的投影曝光装置和方法
    • US5912726A
    • 1999-06-15
    • US922598
    • 1997-09-03
    • Manabu ToguchiKei NaraMasaichi MurakamiNobutaka FujimoriToshio Matsuura
    • Manabu ToguchiKei NaraMasaichi MurakamiNobutaka FujimoriToshio Matsuura
    • G03B27/32G03F7/20G03F9/00G03F9/02H01L21/027G03B27/42G03B27/54
    • G03F9/7026G03F7/70241G03F7/70275
    • A projection exposure apparatus includes an illumination optical system for illuminating a plurality of partial areas on a mask. A plurality of projection optical systems each project images of the partial areas thus illuminated onto a photosensitive substrate. A mask table holds the mask. A position detector detects a position of the mask table. A substrate table holds the photosensitive substrate. A plurality of first reference marks are provided on the mask table; each of the plurality of first reference marks are disposed at a position corresponding to each of the plurality of projection optical systems. A plurality of second reference marks are provided on the substrate table; the second reference marks are substantially conjugate with the first reference marks with respect to the projection optical systems and are in a predetermined positional relation with the first reference marks in in-plane directions of the mask and the photosensitive substrate. A positional deviation detector detects positional deviations between the first reference marks and second reference marks when light beams from the illumination optical system are radiated onto the plurality of first reference marks to project the plurality of first reference marks through the projection optical systems onto the plurality of second reference marks. A correcting device corrects imaging characteristics of the projection optical systems, based on the positional deviations. The first reference marks can comprise a single aperture of a plurality of apertures. A reverse-type aperture may be employed. The positional deviation detector may include a single photodetector or a plurality of photodetectors.
    • 投影曝光装置包括用于照亮掩模上的多个部分区域的照明光学系统。 多个投影光学系统各自投影如此照射到感光基片上的部分区域的图像。 掩模台保持面具。 位置检测器检测掩模台的位置。 基板台保持感光基板。 多个第一参考标记设置在掩模台上; 多个第一参考标记中的每一个被布置在与多个投影光学系统中的每一个对应的位置处。 多个第二参考标记设置在衬底台上; 第二参考标记与第一参考标记相对于投影光学系统基本共轭,并且与掩模和感光基板的面内方向上的第一参考标记处于预定的位置关系。 当将来自照明光学系统的光束照射到多个第一参考标记上时,位置偏差检测器检测第一参考标记和第二参考标记之间的位置偏差,以将多个第一参考标记通过投影光学系统突出到多个 第二个参考标记。 校正装置基于位置偏差校正投影光学系统的成像特性。 第一参考标记可以包括多个孔的单个孔。 可以采用反向孔径。 位置偏差检测器可以包括单个光电检测器或多个光电检测器。