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    • 9. 发明授权
    • Plasma etch and photoresist strip process with intervening chamber de-fluorination and wafer de-fluorination steps
    • 等离子体蚀刻和光刻胶剥离工艺,其中间隔室脱氟和晶圆脱氟步骤
    • US07244313B1
    • 2007-07-17
    • US11388363
    • 2006-03-24
    • Yifeng ZhouGerardo A. DelgadinoChang-Lin (Peter) Hsieh
    • Yifeng ZhouGerardo A. DelgadinoChang-Lin (Peter) Hsieh
    • B08B3/12B08B6/00B08B7/00B08B7/02
    • H01L21/31138H01L21/02049
    • A plasma etch process includes a plasma etch step performed with a photoresist mask on a workpiece using a polymerizing etch process gas that produces in the plasma polymerizing species which accumulate as a protective polymer layer on the surface of said photoresist mask during the etch step, the process including the following steps performed in the same chamber after the etch step and prior to removing the photoresist mask: (a) removing residue of the type including polymer material from chamber surfaces including a ceiling of said chamber, by coupling RF plasma source power into the chamber while coupling substantially no RF plasma bias power into the chamber, and introducing a hydrogen-containing gas into the chamber, until said residue is removed from the chamber surfaces; (b) removing the protective polymer layer from the surface of the photoresist mask, by coupling RF plasma bias power into the chamber while coupling substantially no RF plasma source power into the chamber, and introducing into the chamber a process gas comprising oxygen and carbon monoxide, until the polymer layer is removed from the surface of the photoresist mask.
    • 等离子体蚀刻工艺包括使用聚合蚀刻工艺气体在工件上使用光致抗蚀剂掩模执行的等离子体蚀刻步骤,其在等离子体聚合物质中产生,该等离子体聚合物质在蚀刻步骤期间作为保护性聚合物层积聚在所述光致抗蚀剂掩模的表面上, 该方法包括在蚀刻步骤之后并且在除去光致抗蚀剂掩模之前在相同的室中执行的以下步骤:(a)通过将RF等离子体源功率耦合到其中,从包括所述室的天花板的室表面去除包括聚合物材料的类型的残余物 该室在基本上不将RF等离子体偏压功率耦合到室中,并且将含氢气体引入室中,直到从室表面除去所述残余物; (b)通过将RF等离子体偏压功率耦合到腔室中,同时将基本上没有RF等离子体源功率耦合到腔室中,从而保护聚合物层从光致抗蚀剂掩模的表面上除去,并且将包含氧和一氧化碳的工艺气体 直到聚合物层从光致抗蚀剂掩模的表面去除。