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    Multilayer ceramic chip capacitor with high reliability compatible with nickel electrodes
    1.
    发明授权
    Multilayer ceramic chip capacitor with high reliability compatible with nickel electrodes 有权
    多层陶瓷片式电容器具有高可靠性，兼容镍电极

    公开(公告)号：US06185087B2

    公开(公告)日：2001-02-06

    申请号：US09288079

    申请日：1999-04-08

    申请人： Hyun D. Park ,  Joseph D. Nance ,  Mike S. H. Chu ,  Yuval Avniel

    发明人： Hyun D. Park ,  Joseph D. Nance ,  Mike S. H. Chu ,  Yuval Avniel

    IPC分类号： H01G406

    CPC分类号： H01G4/1227

    摘要： Multilayer ceramic chip capacitors which satisfy X7R requirements and which are compatible with reducing atmosphere sintering conditions so that non-noble metals such as nickel, copper, and alloys thereof may be used for internal and external electrodes are made in accordance with the invention. The capacitors exhibit desirable dielectric properties (high capacitance, low dissipation factor, high insulation resistance), excellent performance on highly accelerated life testing, and very good resistance to dielectric breakdown. The dielectric layers preferably contain BaTiO3 as the major component and CaTiO3, BaO, CaO, SrO, Si02, MnO2, Y2O3, and CoO as minor components in such proportions so that there are present 0.1 to 4 mol % CaTiO3, 0.1 to 2 mol % BaO, 0 to 1 mol % CaO, 0 to 1 mol % SrO, 0.1 to 5 mol % SiO2, 0.01 to 2 mol % MnO2, 0.1 to 3 mol % Y2O3, and 0.01 to 1 mol % CoO. The preferred form of the invention may be sintered in the temperature range 1,250 to 1,400° C. in a reducing atmosphere having a humidified mixture of nitrogen and hydrogen. Additionally, a re-oxidation procedure may be utilized during the sintering cycle to optimize the resistance of the ceramic to dielectric breakdown.

    摘要翻译： 根据本发明制备满足X7R要求并且与还原气氛烧结条件兼容的多层陶瓷片式电容器，以使非贵金属如镍，铜及其合金可用于内部和外部电极。 电容器表现出所需的介电特性（高电容，低损耗因数，高绝缘电阻），在高速加速寿命测试中具有出色的性能，以及非常好的耐电介质击穿性能。 电介质层优选以作为主要成分的BaTiO 3和CaTiO 3，BaO，CaO，SrO，SiO 2，MnO 2，Y 2 O 3和CoO作为次要成分，使得存在0.1〜4摩尔％的CaTiO 3，0.1〜2摩尔％ BaO，0〜1mol％CaO，0〜1mol％SrO，0.1〜5mol％SiO 2，0.01〜2mol％MnO 2，0.1〜3mol％Y 2 O 3和0.01〜1mol％的CoO。 本发明的优选形式可以在具有氮和氢的加湿混合物的还原气氛中在1250至1400℃的温度范围内烧结。 此外，可以在烧结循环期间利用再氧化工艺来优化陶瓷对绝缘击穿的电阻。