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公开(公告)号:US20160093573A1
公开(公告)日:2016-03-31
申请号:US14498217
申请日:2014-09-26
Applicant: United Microelectronics Corp.
Inventor: En-Chiuan Liou , Teng-Chin Kuo , Yi-Ting Chen
IPC: H01L23/544 , H01L21/66 , H01L21/311 , H01L21/033 , H01L23/532 , H01L21/027
CPC classification number: H01L23/544 , G03F7/70633 , H01L22/12 , H01L22/20 , H01L23/53271 , H01L2223/54426 , H01L2924/0002 , H01L2924/00
Abstract: An overlay mark applied to a LELE-type double patterning lithography (DPL) process including a first lithography step, a first etching step, a second lithography step and a second etching step in sequence is described. The overlay mark includes a first x-directional pattern and a first y-directional pattern of a previous layer, second x-directional and y-directional patterns of a current layer defined by the first lithography step, and third x-directional and y-directional patterns of the current layer defined by the second lithography step. The second x-directional patterns and the third x-directional patterns are arranged alternately beside the first x-directional pattern. The second y-directional patterns and the third y-directional patterns are arranged alternately beside the first y-directional pattern.
Abstract translation: 描述了应用于包括第一光刻步骤,第一蚀刻步骤,第二光刻步骤和第二蚀刻步骤的LELE型双重图案化光刻(DPL)工艺的覆盖标记。 覆盖标记包括由第一光刻步骤限定的当前层的先前层,第二x方向和y方向图案的第一x方向图案和第一y方向图案,以及第三x方向和y方向图案, 由第二光刻步骤限定的当前层的方向图案。 第二x方向图案和第三x方向图案交替排列在第一x方向图案旁边。 第二y方向图案和第三y方向图案交替排列在第一y方向图案旁边。