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    • 64. 发明申请
    • ETCHING COMPOSITION AND USE THEREOF WITH FEEDBACK CONTROL OF HF IN BEOL CLEAN
    • 蚀刻组合物及其在BEO清洁中的HF反馈控制​​的应用
    • WO02010480A2
    • 2002-02-07
    • PCT/US2001/023905
    • 2001-07-30
    • C09K13/08C23F1/18C23F1/20G03F7/42H01L21/02H01L21/306H01L21/3213C23G1/00
    • H01L21/02071C09K13/08C11D3/3942C11D3/3947C11D7/08C11D11/0047C23F1/00C23F1/18C23F1/20G03F7/423G03F7/426H01L21/02052H01L21/02063
    • A process for providing an aqueous back-end-of-line (BEOL) clean with feed-back control to monitor the active component of HF in the clean, for a wiring/interconnect of a reactive ion etched semiconductor device, comprising: subjecting the reactive ion etched semiconductor device to a post metal RIE clean using an etchant composition comprising about 0.01 to about 15 percent by weight of sulfuric acid; about 0.1 to about 100 ppm of a fluoride containing compound; and a member selected from the group consisting of about 0.01 to about 20 percent by weight of hydrogen peroxide or about 1 to about 30 ppm of ozone, comprising: a) mixing water, sulfuric acid and hydrogen peroxide in a mixing tank; b) mixing HF directly into the mixing tank or adding HF into a separate vessel for wafer processing, either before, during or after the mixture water, sulfuric acid and hydrogen peroxide as a mixture is transported to the separate tank for wafer processing; c) taking a sample comprising HR from the mixing tank or HF from the wafer processing tank and sending the sample through a feedback loop; d) comprising the sample to a standard dilute solution of HF to obtain a value of HF concentration in the sample; e) inputting the value to a tank tool recipe control to cause any needed adjustment in concentration of HF to a predetermined range, either in the mixing tank or the wafer processing vessel; and f) subjecting the wiring/interconnect of the semiconductor device to etching by the etchant composition to remove sidewall polymer, polymer rails and via residue without etching conductive materials during removal of sidewall polymer, polymer rails, and via residue.
    • 一种用于提供具有反馈控制的水性后端(BEOL)清洁的方法,用于监测清洁中的HF的有源分​​量,用于反应离子蚀刻半导体器件的布线/互连,包括: 使用包含约0.01至约15重量%的硫酸的蚀刻剂组合物将反应离子蚀刻的半导体器件转化为后金属RIE清洁; 约0.1至约100ppm的含氟化合物; 和选自约0.01至约20重量%的过氧化氢或约1至约30ppm的臭氧的成员,其包括:a)在混合罐中混合水,硫酸和过氧化氢; b)将HF直接混合到混合罐中或将HF加入到用于晶片加工的单独的容器中,在混合物之前,期间或之后,将混合物中的硫酸和过氧化氢输送到用于晶片处理的单独的罐中; c)从混合罐或HF从晶片处理槽中取出包含HR的样品,并通过反馈回路发送样品; d)将样品包含到标准稀释的HF溶液中以获得样品中HF浓度的值; e)将所述值输入到罐工具配方控制中,以使所述HF的浓度在所述混合罐或所述晶片处理容器中进行任何所需的HF浓度调整至预定范围; 以及f)在除去侧壁聚合物,聚合物轨道和通孔残留物之前,通过蚀刻剂组合物对半导体器件的布线/互连线进行蚀刻以去除侧壁聚合物,聚合物轨道和通孔残留物而不蚀刻导电材料。