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    • 2. 发明申请
    • SYSTEM AND METHOD FOR FABRICATING CONTACT HOLES
    • 用于制作接触孔的系统和方法
    • WO2005103828A3
    • 2006-06-29
    • PCT/US2005007302
    • 2005-03-07
    • ADVANCED MICRO DEVICES INCMINVIELLE ANNA MTABERY CYRUS EKIM HUNG-EILKYE JONGWOOK
    • MINVIELLE ANNA MTABERY CYRUS EKIM HUNG-EILKYE JONGWOOK
    • G03F7/20
    • G03F7/70425G03F7/70091G03F7/701G03F7/70125G03F7/70158
    • A method of forming a plurality of contact holes (20, 24) of varying pitch and density in a contact layer (56) of an integrated circuit device (10) is provided . The plurality of contact holes (20, 24) can include a plurality of regularly spaced contact holes (20) having a first pitch along a first direction and a plurality of semi-isolated contact holes (24) having a second pitch along a second direction. A double-dipole illumination source (42, 44) can transmit light energy through a mask (48) having a pattern corresponding to a desired contact hole pattern. The double-dipole illumination source (42, 44) can include a first dipole aperture (60), which is oriented and optimized for patterning the regularly spaced contact holes (20), and a second dipole aperture (62), which is oriented substantially orthogonal to the first dipole aperture (60) and optimized for patterning the plA method of forming a plurality of contact holes (20, 2) of varying pitch and density in a contact layer (56) of an integrated circuit device (10) is provided. The plurality of contact holes (20, 24) can include a plurality of regularly spaced contact holes (20) having a first pitc along a first direction and a plurality of semi-isolated contact holes (24) having a second pitch along a second direction. A double-dipole illumination source (42, 44) can transmit light energy through a mask (48) having a pattern corresponding to a desired contact hole pattern. The double-dipole illumination source (42, 44) can include a first dipole aperture (60), which is oriented and optimized for patterning the regularly spaced contact holes (20), and a second dipole aperture (62), which is oriented substantially orthogonal to the first dipole aperture (60) and optimized for patterning the plurality of semi-isolated contact holes (24). The contact layer (56) can be etched using the patterned photoresist layer (58).
    • 提供一种在集成电路器件(10)的接触层(56)中形成多个具有变化的间距和密度的接触孔(20,24)的方法。 多个接触孔(20,24)可以包括沿着第一方向具有第一间距的多个规则间隔的接触孔(20)和沿第二方向具有第二间距的多个半隔离接触孔(24) 。 双偶极子照明源(42,44)可通过具有对应于期望的接触孔图案的图案的掩模(48)透射光能。 双偶极子照明源(42,44)可以包括第一偶极孔(60),其被定向和优化以用于图案化规则间隔开的接触孔(20),以及第二偶极孔(62),其基本上定向 提供与第一偶极子孔(60)正交并且被优化用于图案化在集成电路装置(10)的接触层(56)中形成具有变化的间距和密度的多个接触孔(20,2)的plA方法 。 多个接触孔(20,24)可以包括沿着第一方向具有第一凹坑的多个规则间隔的接触孔(20)和沿着第二方向具有第二间距的多个半隔离接触孔(24) 。 双偶极子照明源(42,44)可通过具有对应于期望的接触孔图案的图案的掩模(48)透射光能。 双偶极子照明源(42,44)可以包括第一偶极孔(60),其被定向和优化以用于图案化规则间隔开的接触孔(20),以及第二偶极孔(62),其基本上定向 与第一偶极孔(60)正交并且被优化用于图案化多个半隔离接触孔(24)。 可以使用图案化的光致抗蚀剂层(58)来蚀刻接触层(56)。