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    • 7. 发明申请
    • Method of eliminating boron contamination in annealed wafer
    • 消除退火晶圆中硼污染的方法
    • US20060148249A1
    • 2006-07-06
    • US10525442
    • 2003-08-28
    • So BaeYoshinobu NakadaKenichi Kaneko
    • So BaeYoshinobu NakadaKenichi Kaneko
    • H01L21/44
    • H01L21/324H01L21/02046
    • A method by which a silicon wafer is prevented from increasing boron concentration near the surface and difference in the boron concentration does not arise between the surface of the annealed wafer and the silicon bulk to eliminate boron contamination in the silicon wafer caused by an annealing treatment is provided. The method includes, when annealing a silicon wafer having a surface on which a native oxide film has formed and boron of environmental origin or from chemical treatment prior to annealing has deposited, steps of carrying out temperature heat-up in a mixed gas atmosphere having a mixing ratio of hydrogen gas to inert gas of 5% to 100% so as to remove the boron-containing native oxide film, followed by annealing in an inert gas atmosphere.
    • 防止硅晶片在表面附近增加硼浓度并且在退火晶片的表面与硅体之间不产生硼浓度的差异以消除由退火处理引起的硅晶片中的硼污染的方法是 提供。 该方法包括:在退火之后退火具有形成有自然氧化膜的表面和环境来源的硼或退火之前的化学处理的硅晶片退火时,在具有 氢气与惰性气体的混合比为5%〜100%,除去含硼自然氧化膜,然后在惰性气体气氛中进行退火。
    • 10. 发明授权
    • Method of eliminating boron contamination in annealed wafer
    • 消除退火晶圆中硼污染的方法
    • US07199057B2
    • 2007-04-03
    • US10525442
    • 2003-08-28
    • So Ik BaeYoshinobu NakadaKenichi Kaneko
    • So Ik BaeYoshinobu NakadaKenichi Kaneko
    • H01L21/311H01L21/322
    • H01L21/324H01L21/02046
    • A method by which a silicon wafer is prevented from increasing boron concentration near the surface and difference in the boron concentration does not arise between the surface of the annealed wafer and the silicon bulk to eliminate boron contamination in the silicon wafer caused by an annealing treatment is provided. The method includes, when annealing a silicon wafer having a surface on which a native oxide film has formed and boron of environmental origin or from chemical treatment prior to annealing has deposited, steps of carrying out temperature heat-up in a mixed gas atmosphere having a mixing ratio of hydrogen gas to inert gas of 5% to 100% so as to remove the boron-containing native oxide film, followed by annealing in an inert gas atmosphere.
    • 防止硅晶片在表面附近增加硼浓度并且在退火晶片的表面与硅体之间不产生硼浓度的差异以消除由退火处理引起的硅晶片中的硼污染的方法是 提供。 该方法包括:在退火之后退火具有形成有自然氧化膜的表面和环境来源的硼或退火之前的化学处理的硅晶片退火时,在具有 氢气与惰性气体的混合比为5%〜100%,除去含硼自然氧化膜,然后在惰性气体气氛中进行退火。