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    • 5. 发明申请
    • EPITAXIAL SILICON WAFER AND METHOD FOR PRODUCING THE EPITAXIAL SILICON WAFER
    • 外延硅陶瓷及其制造方法
    • US20170076959A1
    • 2017-03-16
    • US15311307
    • 2015-04-21
    • SUMCO CORPORATION
    • Jun FUJISEToshiaki ONO
    • H01L21/322H01L29/32
    • H01L21/3221C30B15/00C30B15/203C30B33/02H01L21/322H01L21/3225H01L29/32
    • A method for producing an epitaxial silicon wafer, including a preliminary thermal treatment step of subjecting a silicon wafer to thermal treatment for increasing a density of oxygen precipitates, the silicon wafer being one that has an oxygen concentration in a range of 9×1017 atoms/cm3 to 16×1017 atoms/cm3, contains no dislocation cluster and no COP, and contains an oxygen precipitation suppression region, and an epitaxial layer forming step of forming an epitaxial layer on a surface of the silicon wafer after the preliminary thermal treatment step. The production method further includes a thermal treatment condition determining step of determining a thermal treatment condition in the preliminary thermal treatment step, based on a ratio of the oxygen precipitation suppression region of the silicon wafer before the preliminary thermal treatment step is carried out.
    • 一种外延硅晶片的制造方法,其特征在于,包括对硅晶片进行热处理以提高氧析出物的密度的预热处理工序,所述硅晶片为氧浓度为9×10 17原子/ cm3至16×1017原子/ cm3,不含有位错簇,没有COP,并且含有氧沉淀抑制区域,以及在预热处理步骤之后在硅晶片的表面上形成外延层的外延层形成步骤。 该制造方法还包括热处理条件决定步骤,其基于在进行预热处理步骤之前的硅晶片的氧析出抑制区域的比例,来确定预热处理工序中的热处理条件。