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    • 6. 发明授权
    • Manufacturing method for ferroelectric memory device
    • 铁电存储器件的制造方法
    • US07883961B2
    • 2011-02-08
    • US11998176
    • 2007-11-28
    • Hiroaki TamuraMasaki KurasawaHideki Yamawaki
    • Hiroaki TamuraMasaki KurasawaHideki Yamawaki
    • H01L21/8242
    • H01L27/11507H01L27/11502
    • A manufacturing method for a ferroelectric memory device including: forming a lower electrode; forming an electrode oxide film composed of an oxide of a constituent material of the lower electrode; forming a first ferroelectric layer on the lower electrode by reaction between organometallic source material gas and oxygen gas; forming a second ferroelectric layer on the first ferroelectric layer by reaction between organometallic source material gas and oxygen gas; and forming an upper electrode on the second ferroelectric layer. In the method, the oxygen gas in the forming of the first ferroelectric layer is in an amount less than the amount of oxygen necessary for reaction of the organometallic source material gas. In the method, the oxygen gas in the forming of the second ferroelectric layer is in an amount greater than the amount of oxygen necessary for reaction of the organometallic source material gas.
    • 一种铁电存储器件的制造方法,包括:形成下电极; 形成由下电极的构成材料的氧化物构成的电极氧化膜; 通过有机金属源材料气体和氧气之间的反应在下电极上形成第一铁电层; 通过有机金属源材料气体和氧气之间的反应在第一铁电体层上形成第二铁电层; 以及在所述第二铁电层上形成上电极。 在该方法中,形成第一铁电体层中的氧气的量小于有机金属源材料气体反应所需的氧气量。 在该方法中,形成第二铁电体层的氧气的量比有机金属源材料气体反应所需的氧气的量大。