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    • 6. 发明授权
    • Crystal growth method for thin films of BiSrCaCuO oxides
    • BiSrCaCuO氧化物薄膜的晶体生长方法
    • US06183552B2
    • 2001-02-06
    • US09263824
    • 1999-03-08
    • Shigeki SakaiShinji Migita
    • Shigeki SakaiShinji Migita
    • C30B2922
    • C30B23/02C30B25/02C30B29/22C30B29/225H01L39/2451
    • A crystal growth method for thin films of oxides wherein a vapor-phase deposition method is used to grow crystals for Bi2Sr2CanCun+1O6+2n oxide thin film 304, where n is an integer equal to 1 or greater, includes a first step of growing a Bi2Sr2CuO6 oxide thin film 302 to an arbitrary number of molecular layers by setting a growth environment to conditions in which oxides of bismuth alone are not formed, but intended multi-element oxide is formed, and supplying the growth environment with an excess of bismuth compared with other elements, thereby preventing deficiency of bismuth and also evaporating excess bismuth from the thin film, a second step of causing a layer 303 containing calcium atoms and copper atoms each in the amount of n/2 of the number of strontium atoms contained in the Bi2Sr2CuO6 oxide thin film to accumulate upon the Bi2Sr2CuO6 oxide thin film, and a third step of, in a state in which environmental temperature is set higher than the environmental temperature in the first step, causing the Bi2Sr2CuO6 oxide thin film 302 and the accumulated calcium atoms and copper 303 atoms to react to grow crystals for a thin film 304 of an oxide Bi2Sr2CanCun+1O6+2n, where n is an integer equal to 1 or greater.
    • 使用气相沉积法生长Bi2Sr2CanCun + 1O6 + 2n氧化物薄膜304(其中n为等于1或更大的整数)的晶体的晶体生长方法包括:生长第一步骤 Bi2Sr2CuO6氧化物薄膜302通过将生长环境设定为不形成单独的铋氧化物的条件而形成任意数量的分子层,并且形成预期的多元素氧化物,并且向生长环境提供过量的铋,与 其它元素,从而防止铋的缺乏并且还从薄膜中蒸发过量的铋;第二步是使含有Ca 2原子和铜原子的层303分别以Bi2Sr2CuO6中所含的锶原子数量的n / 2的量 氧化物薄膜积累在Bi2Sr2CuO6氧化物薄膜上,第三步,在环境温度设定为高于fi的环境温度的状态下 第一步骤,使Bi2Sr2CuO6氧化物薄膜302和累积的钙原子和铜303原子反应生长用于氧化物Bi2Sr2CanCun + 1O6 + 2n的薄膜304的晶体,其中n是等于1或更大的整数。