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    • 54. 发明授权
    • Deep submicron metallization using deep UV photoresist
    • 深亚微米金属化使用深紫外光致抗蚀剂
    • US06287959B1
    • 2001-09-11
    • US09065352
    • 1998-04-23
    • Christopher F. LyonsBhanwar Singh
    • Christopher F. LyonsBhanwar Singh
    • H01L214763
    • H01L21/0276H01L21/31116H01L21/3144H01L21/76802Y10S438/952Y10S438/97
    • Reflection of incident optical radiation from a highly reflective metal layer (12), such as aluminum, copper or titanium, into a photoresist layer (16) is reduced by interposing a layer of silicon oxynitride (14) between the metal and photoresist layers. The silicon oxynitride layer (14) is pre-treated with an oxidizing plasma to deplete surface nitrogen and condition the silicon oxynitride layer (14) to be more compatible with deep ultraviolet photoresists. The silicon oxynitride layer (14) further serves as an etch stop in the formation of interconnect openings (40), such as vias, contacts and trenches. The interconnect opening (40) is filled with a second metallization layer to achieve multi-layer electrical interconnection.
    • 通过在金属和光致抗蚀剂层之间插入一层氮氧化硅(14),将来自诸如铝,铜或钛的高反射金属层(12)的入射光辐射反射到光致抗蚀剂层(16)中。 氮氧化硅层(14)用氧化等离子体进行预处理以消除表面氮,并且使氮氧化硅层(14)与深紫外光致抗蚀剂更相容。 氧氮化硅层(14)还用作形成互连开口(40)的蚀刻停止层,例如通路,触点和沟槽。 互连开口(40)填充有第二金属化层以实现多层电互连。
    • 60. 发明授权
    • Negative resist or dry develop process for forming middle of line implant layer
    • 用于形成线植入层中间的负阻抗或干式显影工艺
    • US07112489B1
    • 2006-09-26
    • US11004691
    • 2004-12-03
    • Christopher F. LyonsAnna MinvielleMarina V. Plat
    • Christopher F. LyonsAnna MinvielleMarina V. Plat
    • H01L21/336H01L21/8238
    • H01L27/115H01L21/26513H01L27/11521
    • A method of implanting a middle of line (MOL) implant layer of a flash memory device that does not require a descumming step is disclosed. In a first embodiment, the method includes depositing a negative tone resist over the MOL implant layer. Portions of the negative tone resist in and above a plurality of trenches are not exposed to optical radiation, while portions surrounding the plurality of trenches are exposed. The unexposed portions are developed out thereby leaving a bottom surface of each trench substantially free of a resist residue. Implants can be placed in the MOL implant layer without the need for a descumming step. In a second embodiment, a bi-layer resist is deposited on the MOL implant layer, wherein the bi-layer resist includes a silicon containing top layer and a bottom layer. The bi-layer resist is patterned to expose a portion of the bottom layer that resides in and above a plurality of trenches. The bottom layer is dry etch developed using oxygen plasma as the etchant, thereby leaving a bottom surface of each trench substantially free of a resist residue. Implants can be placed in the MOL implant layer without the need for a descumming step.
    • 公开了一种注入不需要除尘步骤的闪速存储器件的中间线(MOL)注入层的方法。 在第一实施例中,该方法包括在MOL植入层上沉积负色调抗蚀剂。 在多个沟槽中和上方的负色调抗蚀剂的部分不暴露于光辐射,而围绕多个沟槽的部分被暴露。 未曝光部分显影出来,从而留下每个沟槽的底表面基本上没有抗蚀剂残留物。 植入物可以放置在MOL植入层中,而不需要除去步骤。 在第二实施例中,双层抗蚀剂沉积在MOL注入层上,其中双层抗蚀剂包括含硅顶层和底层。 图案化双层抗蚀剂以暴露驻留在多个沟槽中和上方的底层的一部分。 底层是使用氧等离子体作为蚀刻剂进行干法蚀刻,从而留下每个沟槽的底表面基本上没有抗蚀剂残留物。 植入物可以放置在MOL植入层中,而不需要除去步骤。