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    • 3. 发明授权
    • Multilayer ceramic capacitor
    • 多层陶瓷电容器
    • US06493207B2
    • 2002-12-10
    • US09887927
    • 2001-06-26
    • Yukie NakanoTakako HibiMari MiyauchiDaisuke Iwanaga
    • Yukie NakanoTakako HibiMari MiyauchiDaisuke Iwanaga
    • H01G4228
    • H01G4/0085H01G4/30
    • The invention provides a multilayer ceramic capacitor capable of preventing the occurrence of cracks by inhibiting the multilayer capacitor from expanding in a stacking direction and a width direction. The multilayer ceramic capacitor includes a capacitor element (10) in which dielectric layers (11a and 11b) and internal electrodes (12) are alternately stacked. The capacitor element (10) is obtained by stacking and firing a dielectric paste layer and an internal electrode paste layer. An expansion coefficient x in the stacking direction lies between −0.05i% and 0.05i% inclusive, where i denotes the number of dielectric layers (11a), preferably the expansion coefficient x is 0% or less, or more preferably the expansion coefficient x lies between −10% and 0% inclusive. Preferably, an expansion coefficient y in the width direction lies between −0.05i% and 0% inclusive. The expansion coefficients x and y can be controlled by adding a carbon material or a lithium-containing compound to the internal electrode paste layer, or by reducing a thickness of the dielectric layer (11b) located in an outermost portion. Thus, the occurrence of cracks is inhibited, and therefore a fraction defective is reduced.
    • 本发明提供一种能够通过抑制层叠电容器在堆叠方向和宽度方向上扩展来防止发生裂纹的多层陶瓷电容器。 多层陶瓷电容器包括其中电介质层(11a和11b)和内部电极(12)交替堆叠的电容器元件(10)。 电容器元件(10)通过堆叠和烧结电介质浆料层和内部电极浆料层而获得。 叠层方向的膨胀系数x在-0.05i%〜0.05i%的范围内,其中i表示介电层数(11a),优选膨胀系数x为0%以下,更优选膨胀系数x 在-10%至0%之间。 优选地,宽度方向上的膨胀系数y在-0.05%和0%之间。 膨胀系数x和y可以通过向内部电极浆料层中添加碳材料或含锂化合物,或通过减小位于最外部的电介质层(11b)的厚度来控制。 因此,可以抑制裂缝的发生,因此能够降低部分缺陷。