会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 79. 发明授权
    • Quartz glass crucible for pulling single crystal
    • 石英玻璃坩埚拉单晶
    • US5885071A
    • 1999-03-23
    • US812843
    • 1997-03-06
    • Hiroyuki WatanabeTatsuhiro Sato
    • Hiroyuki WatanabeTatsuhiro Sato
    • C03B20/00C03B19/09C03C17/34C30B15/10C30B29/06C30B35/00F27B14/10B29D22/00
    • C03C17/3411C03B19/095C30B15/10C30B35/002Y10T428/13
    • In order to reduce concentrations of impurities in an inner layer of a quartz crucible for pulling a silicon single crystal which comprises an outer layer made of quartz glass and an inner layer formed on the inner surface of the outer layer, a migration-preventing layer is formed between the outer and inner layers, wherein the migration-preventing layer prevents migration of the impurities such as alkaline metals included in the natural quartz glass in the outer layer to the synthetic quartz glass in the inner layer. The method of producing a crucible using a mold with an upper opening comprises the steps of: feeding a first quartz powder into the mold along an inner surface of the mold to pile up the first quartz powder in a layered structure and form a preform of the first quartz powder; melting a part of the preform by heat radiated from inside the preform; cooling the preform to solidify and form a crucible substrate of an opaque quartz glass layer; generating a high temperature gas atmosphere inside the substrate during or after formation of the substrate; feeding a second quartz powder containing aluminum or in combination with an aluminum-containing component into the gas atmosphere and melting it in the gas atmosphere; settling the second quartz powder melt flying from the gas atmosphere on an inner surface of the substrate to form an aluminum-containing intermediate quartz glass layer; feeding a third quartz powder into the gas atmosphere and melting it in the gas atmosphere; and it as settling the third quartz powder melt flying from the gas atmosphere on the inner surface of the aluminum-containing quartz glass layer to form a transparent quartz glass layer with high purity.
    • 为了降低石英坩埚的内层中的杂质浓度,用于拉制包含由石英玻璃制成的外层和形成在外层的内表面上的内层的硅单晶,防迁移层为 形成在外层和内层之间,其中防迁移层防止包含在外层中的天然石英玻璃中的杂质如内层中的合成石英玻璃的迁移。 使用具有上部开口的模具制造坩埚的方法包括以下步骤:沿着模具的内表面将第一石英粉末进料到模具中,以堆叠结构堆积第一石英粉末,并形成预成型体 第一石英粉; 通过从预制件内部辐射的热量来熔化预成型件的一部分; 冷却预成型件以固化并形成不透明石英玻璃层的坩埚基底; 在基板形成期间或之后在基板内产生高温气体气氛; 将含有铝的第二石英粉末或与含铝组分组合进入气体气氛中并在气体气氛中熔融; 将从气体气氛中飞散的第二石英粉末熔融在基板的内表面上,形成含铝的中间石英玻璃层; 将第三石英粉放入气体气氛中并在气体气氛中熔化; 并将其沉淀在含铝石英玻璃层的内表面上从气体气氛中飞散的第三石英粉末熔融物,以形成高纯度的透明石英玻璃层。