发明名称 Microelectronic lithographic alignment using high contrast alignment mark
摘要 A microelectronic structure, and in particular a semiconductor structure, includes a substrate that includes an alignment mark comprising a substantially present element that has an atomic number at least 5 greater than a highest atomic number substantially present element within the substrate. Alignment to the alignment mark may be effected using an electron beam as an alignment beam with respect to both a direct write exposure and a reticle filtered optical exposure of a mask layer (i.e., photoresist mask layer) located over the alignment mark and the substrate. The electron beam alignment beam may effectively penetrate through other layers, including conductor layers comprising elements having appropriately low atomic number, located interposed between the alignment mark and the mask layer.
申请公布号 US7893549(B2) 申请公布日期 2011.02.22
申请号 US20070838507 申请日期 2007.08.14
申请人 INTERNATIONAL BUSINESS MACHINES CORPORATION 发明人 BUCCHIGNANO JAMES J.;ROTHWELL MARY BETH;WISNEIFF ROBERT LUKE;YU ROY RONGQUING
分类号 H01L23/544 主分类号 H01L23/544
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