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    • 52. 发明申请
    • MULTILAYER CERAMIC CAPACITOR AND METHOD OF MANUFACTURING THE SAME
    • 多层陶瓷电容器及其制造方法
    • US20120127626A1
    • 2012-05-24
    • US13033897
    • 2011-02-24
    • Dong Ik CHANGKang Heon HurDoo Young KimJi Hun Jeong
    • Dong Ik CHANGKang Heon HurDoo Young KimJi Hun Jeong
    • H01G4/30H01G7/00
    • H01G4/012H01G4/30Y10T29/435
    • Disclosed are a multilayer ceramic capacitor and a method of manufacturing the same. The multilayer ceramic capacitor includes a ceramic body having a plurality of dielectric layers stacked on top of each other, at least one internal electrode formed on a corresponding one of the plurality of dielectric layers and having uneven portions formed at an edge thereof, the internal electrode having a connectivity of between 0.7 and 0.9, which is defined by an equation below, and an external electrode formed on an outer surface of the ceramic body and connected with the internal electrode, Z=X−Y/X   (Equation) where X denotes a length of a cross-section of the internal electrode in one direction, Y denotes a total length of gaps formed by holes in the cross-section, and Z denotes the connectivity of the internal electrode. The multilayer ceramic capacitor achieves a low crack generation rate and a high level of reliability.
    • 公开了一种多层陶瓷电容器及其制造方法。 多层陶瓷电容器包括:陶瓷体,其具有堆叠在彼此顶部的多个电介质层,至少一个内部电极,形成在所述多个电介质层中的相应一个电介质层上,并且在其边缘形成有不平坦部分,所述内部电极 具有由下式定义的0.7至0.9的连接性以及形成在陶瓷体的外表面上并与内部电极连接的外部电极,Z = X-Y / X(等式)其中X表示 内部电极在一个方向上的横截面的长度,Y表示横截面中由孔形成的间隙的总长度,Z表示内部电极的连通性。 多层陶瓷电容器实现了低裂纹产生率和高可靠性。
    • 59. 发明授权
    • Method for producing barium titanate based powders by oxalate process
    • 通过草酸盐法生产钛酸钡基粉末的方法
    • US06641794B2
    • 2003-11-04
    • US09871286
    • 2001-05-31
    • Jai Joon LeeKang Heon Hur
    • Jai Joon LeeKang Heon Hur
    • C01G2300
    • C01G25/006C01G23/006C01G25/00C01P2004/62C01P2006/10C01P2006/40
    • The method is carried out in the following manner: An aqueous mixture solution containing barium chloride and titanium chloride is added into an aqueous oxalic acid solution, so that barium titanyl oxalate would be precipitated. Then the precipitates are aged, washed and filtered. The filtered barium titanyl oxalate precipitates are crushed, and dried. Then a thermal decomposition is carried out to obtain a agglomerated barium titanate powder, and this is crushed again to obtain the final barium titanate powder. In order to obtain barium titanate based powder such as Ba(Ti1−zZrz)O3, (Ba1−xCax)(Ti1−zZrz)O3, and (Ba1−x−yCaxSry)(Ti1−zZrz)O3, the desired elements (Ca, Sr, Zr and so on) are added to barium titanyl oxalate when crushed before thermal decomposition step. After thermal decomposition and crushing, the barium titanate based powder can be obtained.
    • 该方法按以下方式进行:将含有氯化钡和氯化钛的混合溶液加入草酸水溶液中,使草酸二氧化钛沉淀。 然后将沉淀物老化,洗涤和过滤。 过滤的草酸氧钛钡沉淀物被粉碎并干燥。 然后进行热分解以获得凝集的钛酸钡粉末,并再次粉碎,得到最终的钛酸钡粉末。 为了获得Ba(Ti1-zZrz)O3,(Ba1-xCax)(Ti1-zZrz)O3和(Ba1-x-yCaxSry)(Ti1-zZrz)O3等钛酸钡系粉末,需要的元素(Ca ,Sr,Zr等)加入到钛酸氧钛酸钡中,在热分解步骤之前被粉碎。 在热分解和破碎之后,可以获得钛酸钡基粉末。