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    • 29. 发明授权
    • Type mask for combining off axis illumination and attenuating phase shifting mask patterns
    • 用于组合离轴照明和衰减相移掩模图案的类型掩模
    • US06495297B1
    • 2002-12-17
    • US09666314
    • 2000-09-21
    • Chih-Chiang TuSan-De Tzu
    • Chih-Chiang TuSan-De Tzu
    • G03F900
    • G03F1/78G03F1/32
    • A mask and method of forming a mask for forming electrode patterns having both closely spaced lines and lines with greater separation between them. The mask uses a pattern formed using attenuating phase shifting material for the region of the mask with lines with greater separation and a binary pattern formed using opaque material in the region of the mask with closely spaced lines. The mask design data is used to determine the mask regions using attenuating phase shifting material and the regions of the mask using a binary pattern. The mask is illuminated using off axis illumination, preferably quadrapole off axis illumination. The mask is formed using electron beam exposure of a resist using more than one exposure dose so that only one layer of resist is required to form the two regions of the mask one using attenuating phase shifting material and one using a binary pattern.
    • 形成掩模的掩模和方法,用于形成具有彼此间隔很远的线和线的电极图案,并且它们之间具有更大的间隔。 掩模使用通过使用衰减相移材料形成的图案,用于具有较大分离的线的掩模区域,并且使用不透明材料在具有紧密间隔的线的区域中形成二元图案。 掩模设计数据用于使用衰减相移材料和掩模的区域使用二进制图案来确定掩模区域。 使用离轴照明照亮掩模,最好是四极偏离轴照明。 使用多于一个曝光剂量的抗蚀剂的电子束曝光来形成掩模,使得仅使用一层抗蚀剂来形成使用衰减相移材料的掩模一个的两个区域,而使用二元图案形成掩模的两个区域。
    • 30. 发明授权
    • Solving line-end shortening and corner rounding problems by using a simple checking rule
    • 通过简单的检查规则解决线端缩短和圆角问题
    • US06311319B1
    • 2001-10-30
    • US09083273
    • 1998-05-22
    • Chih-Chiang TuRen-Guey Hsieh
    • Chih-Chiang TuRen-Guey Hsieh
    • G06F760
    • G03F7/70433G03F1/36G03F7/70441
    • A methodolgy is described which allows a variety of optical proximity corrections to be added to a mask pattern at low cost and with a view to minimizing the number of electron beam exposures that will be needed later when the reticle is prepared. The basic approach is to add serifs and/or hammerheads to the vertices of the mask pattern on the basis of a small number of simple rule checks. The first check is for the presence of an overlapping pattern at the next level. If this is not detected noting is added at the vertex in question. If some overlap is etected, a predefined search area (at the same mask level) is quickly scanned and, if another stripe is found to be located within a preset distance, serifs are added at the appropriate vertices. If no stripe was found, a second search area, further away, is scanned and if a neighbouring stripe is detected this time, larger serifs are added. If the second search also comes up empty, a hammerhead is added at the appropriate line end. The method may be refined by using additional searches, if so desired.
    • 描述了一种方法,其允许以低成本将各种光学邻近校正添加到掩模图案中,并且考虑到最小化当准备掩模版时稍后将需要的电子束曝光的数量。 基本方法是基于少量简单的规则检查,将衬线和/或锤头添加到掩模图案的顶点。 第一个检查是在下一个级别存在重叠模式。 如果没有检测到,则在相关顶点添加注释。 如果检测到一些重叠,则快速扫描预定义的搜索区域(处于相同的掩码级别),并且如果发现另一个条带位于预设的距离内,则在适当的顶点添加衬线。 如果没有找到条带,则扫描更远的第二搜索区域,并且如果此时检测到相邻的条带,则添加更大的衬线。 如果第二次搜索也是空的,那么在适当的行尾添加一个锤头。 如果需要,可以通过使用其他搜索来改进该方法。