发明名称 Lithography alignment and overlay measurement marks formed by resist mask blocking for MRAMs
摘要 A method of manufacturing a resistive semiconductor memory device (10), comprising depositing an insulating layer (34) over a workpiece (30), and defining a pattern for a plurality of alignment marks (22) and a plurality of conductive lines (54) within the insulating layer (34). A resist (50) is formed over the alignment marks (22), and a conductive material (52) is deposited over the wafer to fill the conductive pattern. The wafer is chemically-mechanically polished to remove excess conductive material from over the insulating layer and form conductive lines (54). The resist (50) is removed from over the alignment marks (22), and the alignment marks (22) are used for alignment of subsequently deposited layers of the resistive memory device (10).
申请公布号 US2003224260(A1) 申请公布日期 2003.12.04
申请号 US20020161867 申请日期 2002.06.03
申请人 INFINEON TECHNOLOGIES NORTH AMERICA CORP. 发明人 NING XIAN J.
分类号 G03F7/20;G03F9/00;(IPC1-7):G03F9/00;H01L21/00;G03F7/16;G03F7/40 主分类号 G03F7/20
代理机构 代理人
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