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    • 10. 发明公开
    • Pattern formation in the fabrication of microelectronic devices
    • Mustererzeugung in der Herstellung von mikroelektronischen Anordnungen
    • EP0686999A3
    • 1997-08-20
    • EP95108351.8
    • 1995-05-31
    • TEXAS INSTRUMENTS INCORPORATED
    • Moslehi, Mehrdad M.
    • H01L21/033H01L21/321G03F7/00
    • H01L21/0337G03F7/0042G03F7/265H01L21/0332H01L21/3086H01L21/3105H01L21/32139Y10S430/167Y10S430/168Y10S438/911Y10S438/942Y10S438/95Y10S438/981
    • An all-dry microlithography process, where a fluorinated layer 30 is deposited on a processable layer 18 of a semiconductor wafer, and regions of the fluorinated layer 30 are exposed to a masked radiation source so that exposed regions and unexposed areas 31 are formed in the fluorinated layer 30 . An oxide layer is grown on the fluorinated layer, forming thicker region 34 of oxide on the unexposed areas 31 of the fluorinated layer 30 , and forming thinner regions 32 of oxide on the exposed regions of the fluorinated layer 30 . The oxide layer is then etched, removing thinner regions 32 of the oxide layer but leaving at least a fraction of the thicker portions 34 of the oxide layer to be used as a patterned hard mask. Then the exposed fluorinated layer not covered by the patterned oxide hard mask, is etched, to expose areas of the processable layer 18 not covered by the oxide hard mask, for subsequent patterned processing. The subsequent patterned processing may be an etch process for pattern transfer to the processable layer, a doping process to dope the exposed regions of the processable layer, or another process such as a deposition step. The all-dry lithography process can be completed in an integrated environment, such as a cluster tool, resulting in improved manufacturing cycle time and increased yields. The dry photosensitive layer may be deposited using PECVD at low temperatures, and is compatible with all other semiconductor device fabrication process flows.
    • 将全氟干燥微光刻工艺,其中氟化层30沉积在半导体晶片的可加工层18上,并且氟化层30的区域暴露于掩蔽的辐射源,使得暴露区域和未曝光区域31形成在 氟化层30.在氟化层上生长氧化物层,在氟化层30的未曝光区域31上形成氧化物的较厚区域34,并在氟化层30的暴露区域上形成氧化物的较薄区域32.氧化物 然后蚀刻层,去除氧化物层的较薄区域32,但留下用作图案化硬掩模的氧化物层的较厚部分34的至少一部分。 然后蚀刻未被图案化的氧化物硬掩模覆盖的暴露的氟化层,以露出未被氧化物硬掩模覆盖的可加工层18的区域,以进行后续的图案化处理。 随后的图案化处理可以是用于图案转移到可加工层的蚀刻工艺,用于掺杂可加工层的暴露区域的掺杂工艺或诸如沉积步骤的另一工艺。 全干式光刻工艺可以在诸如集群工具的集成环境中完成,从而改善制造周期时间并提高产量。 可以使用PECVD在低温下沉积干燥的感光层,并且与所有其它半导体器件制造工艺流程兼容。