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    • 14. 发明授权
    • Capacitor and method for manufacturing the same
    • 电容器及其制造方法
    • US07233480B2
    • 2007-06-19
    • US11475891
    • 2006-06-28
    • Kazuhiro HayashiAkifumi TosaMotohiko SatoJun OtsukaManabu Sato
    • Kazuhiro HayashiAkifumi TosaMotohiko SatoJun OtsukaManabu Sato
    • H01G4/228
    • H01G4/30H01G4/12
    • A laminated ceramic capacitor (10) divided into a first laminate (11), a second laminate (12), a third laminate (13), and a fourth laminate (14). The first laminate (11) includes a ceramic layer (15) serving as a dielectric layer. The ceramic layer (15) is thicker than a ceramic layer (17) sandwiched between internal electrodes (16a) in the second laminate (12) or the fourth laminate (14), and thinner than 20 times the thickness of the ceramic layer (17). The third laminate (13) includes dielectric layers, which serve as the ceramic layers (17), and has a thickness of 5% of the total thickness of the second laminate (12) and the fourth laminate (14). Accordingly, the third laminate (13) achieves the function of absorbing an electrode-induced thickness differential. Also, by means of regulating the thickness of the first laminate (11), portions of via electrodes (18) that extend without being electrically connected to the internal electrodes (16b) can be shortened.
    • 分为第一层压体(11),第二层压板(12),第三层压板(13)和第四层压板(14)的层压陶瓷电容器(10)。 第一层压体(11)包括用作电介质层的陶瓷层(15)。 陶瓷层(15)比夹在第二层叠体(12)或第四层叠体(14)的内部电极(16a)之间的陶瓷层(17)厚,比陶瓷层(15)的厚度薄 17)。 第三层压体(13)包括作为陶瓷层(17)的电介质层,其厚度为第二层叠体(12)和第四层叠体(14)的总厚度的5%。 因此,第三层压体(13)实现吸收电极引起的厚度差的功能。 此外,通过调整第一层压体(11)的厚度,能够缩短在不与内部电极(16b)电连接的情况下延伸的通孔电极(18)的部分。
    • 17. 发明授权
    • Dielectric material, a method for producing the same and a dielectric
resonator device comprising same
    • 电介质材料,其制造方法和包括该介电材料的介质谐振器装置
    • US6117806A
    • 2000-09-12
    • US957627
    • 1997-10-24
    • Hitoshi YokoiAkifumi TosaKazushige Ohbayashi
    • Hitoshi YokoiAkifumi TosaKazushige Ohbayashi
    • C04B35/495H01P7/10
    • C04B35/495H01P7/10
    • Dielectric materials are disclosed that are based on BaO--ZnO--Ta.sub.2 O.sub.5 represented by the formula Ba(Zn.sub.1/3 Ta.sub.2/3)O.sub.3. Ba has been partly replaced by K and either Zn or Ta has been replaced by at least one element selected from Mg, Zr, Ga, Ni, Nb, Sn. The dielectric materials have a relatively high permittivity, a small absolute value of the temperature coefficient of resonance frequency, and a high unloaded quality factor. A method for producing the dielectric materials is also disclosed which includes mixing given amounts of starting materials, such as, for example, BaCO.sub.3, ZnO, Ta.sub.2 O.sub.5, K.sub.2 CO.sub.3, MgCO.sub.3, SnO.sub.2 or ZrO.sub.2, compacting the mixture to produce a compact, sintering the compact in an oxidizing atmosphere such as, for example, air, at 1,400 and 1,600.degree. C., more preferably at 1,550 to 1,600.degree. C. for 2 hours, and then heating the sintered compact at a temperature lower than the sintering temperature by from 50 to 250.degree. C., e.g., by 100.degree. C., for at least 12 hours, preferably for 24 hours. A dielectric resonator comprising the dielectric material of the present invention is also disclosed.
    • 公开了基于由式Ba(Zn + E,fra 1/3 + EE Ta + E,fra 2/3 + EE)O 3表示的BaO-ZnO-Ta 2 O 5的介电材料。 Ba部分被K替代,并且Zn或Ta已经被选自Mg,Zr,Ga,Ni,Nb,Sn中的至少一种元素代替。 电介质材料具有相对高的介电常数,谐振频率的温度系数的绝对值小,以及高的卸载品质因数。 还公开了一种用于制造电介质材料的方法,其包括混合给定量的起始材料,例如BaCO 3,ZnO,Ta 2 O 5,K 2 CO 3,MgCO 3,SnO 2或ZrO 2,将该混合物压实成压坯, 在氧化气氛例如空气中,在1,400和1600℃,更优选在1,550至1600℃下进行2小时,然后在低于烧结温度的温度下将烧结体加热50 至250℃,例如100℃,至少12小时,优选24小时。 还公开了包括本发明的介电材料的介质谐振器。