公开(公告)号：US06383323B1

公开(公告)日：2002-05-07

申请号：US09935611

申请日：2001-08-23

申请人： Nobuyuki Wada ,  Takashi Hiramatsu ,  Jun Ikeda ,  Yukio Hamaji

发明人： Nobuyuki Wada ,  Takashi Hiramatsu ,  Jun Ikeda ,  Yukio Hamaji

IPC分类号： B32B3126

CPC分类号： H01G4/1227 ,  C04B35/4682

摘要： A dielectric ceramic which exhibits small variation in dielectric constant, allows use of a base metal, can be fired in a reducing atmosphere and which is suitable for constituting a dielectric ceramic layer for, e.g., a laminated ceramic capacitor is obtained by firing barium titanate powder in which the c-axis/a-axis ratio in the perovskite structure is about 1.000 or more and less than about 1.003 and the amount of OH groups in the crystal lattice is about 2.0 wt. % or less. The barium titanate powder starting material preferably has a maximum particle size of about 0.3 &mgr;m or less and an average particle size of about 0.05-0.15 &mgr;m. Each particle of the barium titanate powder preferably comprises a low-crystallinity portion and a high-crystallinity portion, the diameter of the low-crystallinity portion being about 0.5 times or more the particle size of the powder. When sintered, the powder satisfies the ratio of (average grain size of the fired dielectric ceramic)/(average particle size of barium titanate powder starting material), R, of about 0.90-1.2, to thereby suppress considerable grain growth. A laminated ceramic electronic element including a laminate of a plurality of layers of the above-mentioned dielectric ceramic, as well as a method for producing the same, is described.

摘要翻译： 介电常数变化小的电介质陶瓷可以使用贱金属，可在还原气氛中烧成，适用于构成电介质陶瓷层，例如通过烧结钛酸钡粉末得到层压陶瓷电容器 其中钙钛矿结构中的c轴/ a轴比为约1.000以上且小于约1.003，并且晶格中的OH基的量为约2.0重量％。 ％ 或更少。 钛酸钡粉末原料优选具有约0.3μm或更小的最大粒度和约0.05-0.15μm的平均粒度。 钛酸钡粉末的每个颗粒优选包含低结晶度部分和高结晶度部分，低结晶度部分的直径为粉末粒径的约0.5倍以上。 当烧结时，粉末满足（烧结的电介质陶瓷的平均粒径）/（平均粒径的钛酸钡粉末原料）的比例R为约0.90-1.2，从而抑制相当大的晶粒生长。 描述了包括上述介电陶瓷的多层的叠层体的层压陶瓷电子元件及其制造方法。

公开(公告)号：US06295196B1

公开(公告)日：2001-09-25

申请号：US09611101

申请日：2000-07-06

申请人： Yukio Hamaji ,  Nobuyuki Wada ,  Tsuyoshi Yamana ,  Takanori Nakamura

发明人： Yukio Hamaji ,  Nobuyuki Wada ,  Tsuyoshi Yamana ,  Takanori Nakamura

IPC分类号： H01G406

CPC分类号： H01G4/0085 ,  H01G4/1227 ,  H01G4/30

摘要： A monolithic ceramic electronic component includes a laminate including a plurality of ceramic layers obtained by sintering a ceramic raw material powder, and a plurality of internal electrodes located between the ceramic layers and obtained by sintering a metallic powder. The ceramic layers have a thickness of about 3 &mgr;m or less and are composed of ceramic grains having an average particle diameter of more than about 0.5 &mgr;m, the particle diameter of the ceramic grains in the thickness direction of the ceramic layers is smaller than the thickness of the ceramic layers, and the internal electrodes have a thickness of about 0.2 to 0.7 &mgr;m. Preferably, the monolithic ceramic electronic component further includes an external electrode formed on each of the opposing ends of the laminate, the ceramic layers are composed of a ceramic dielectric material, and each of the plurality of internal electrodes is formed with an edge being exposed to either one of the opposing ends of the laminate so as to be electrically connected to either one of the external electrodes to form a monolithic ceramic capacitor.

摘要翻译： 单片陶瓷电子部件包括通过烧结陶瓷原料粉末而获得的多个陶瓷层和位于陶瓷层之间并通过烧结金属粉末获得的多个内部电极的层叠体。 陶瓷层的厚度为3μm以下，由平均粒径大于0.5μm的陶瓷颗粒构成，陶瓷层的厚度方向的陶瓷粒子的粒径小于陶瓷层的厚度 的陶瓷层，内部电极的厚度为0.2〜0.7μm左右。 优选地，所述整体式陶瓷电子部件还包括形成在所述层叠体的各相对端的外部电极，所述陶瓷层由陶瓷电介质材料构成，所述多个内部电极中的每一个形成有暴露于 层压体的相对端中的任一个，以便电连接到任一个外部电极以形成单片陶瓷电容器。

公开(公告)号：US06225250B1

公开(公告)日：2001-05-01

申请号：US09251663

申请日：1999-02-17

申请人： Nobuyuki Wada ,  Jun Ikeda ,  Takashi Hiramatsu ,  Yukio Hamaji

发明人： Nobuyuki Wada ,  Jun Ikeda ,  Takashi Hiramatsu ,  Yukio Hamaji

IPC分类号： C04B35468

CPC分类号： H01G4/1227 ,  H01G4/30

摘要： The present invention provides a dielectric ceramic composition whose electrostatic capacity has an excellently low temperature dependence; which can be fired in a reducing atmosphere; and which is advantageously used in a laminated ceramic capacitor having an internal electrode formed of a base metal such as nickel or nickel alloy. The dielectric ceramic composition is represented by the following formula: {Ba1−xCaxO}mTiO2+&agr;MgO+&bgr;MnO, wherein 0.001≦&agr;≦0.05; 0.001≦&bgr;≦0.025; 1.000

摘要翻译： 本发明提供一种介电陶瓷组合物，其静电容量具有优异的低温依赖性; 可在还原气氛中燃烧; 并且其有利地用于具有由诸如镍或镍合金的贱金属形成的内部电极的层叠陶瓷电容器中。 介电陶瓷组合物由下式表示：其中

公开(公告)号：US06769160B2

公开(公告)日：2004-08-03

申请号：US10087767

申请日：2002-03-05

申请人： Shoichi Higuchi ,  Tatsuo Kunishi ,  Yukio Hamaji

发明人： Shoichi Higuchi ,  Tatsuo Kunishi ,  Yukio Hamaji

IPC分类号： H01G700

CPC分类号： H01G4/232 ,  H01C1/148 ,  H01C17/283 ,  Y10T29/417 ,  Y10T29/435 ,  Y10T29/49098 ,  Y10T29/49144 ,  Y10T428/12708

摘要： A process for manufacturing an electronic part having a ceramic body and an outer electrode form on the surface of the body, the outer electrode including a plurality of layers and having a Sn plating layer as the outermost layer. The Sn plating layer having an average crystal grain size of about 1 &mgr;m or less is formed on a Ni or Ni alloy by electroplating in a plating bath having a pH of about 3 to 10.

摘要翻译： 一种制造在本体表面上具有陶瓷体和外部电极的电子部件的制造方法，其特征在于，所述外部电极具有多层，并具有Sn镀层作为最外层。 通过在pH为约3〜10的电镀浴中电镀，在Ni或Ni合金上形成平均结晶粒径为1μm以下的Sn镀层。

公开(公告)号：US06373683B1

公开(公告)日：2002-04-16

申请号：US09680610

申请日：2000-10-06

申请人： Shoichi Higuchi ,  Tatsuo Kunishi ,  Yukio Hamaji

发明人： Shoichi Higuchi ,  Tatsuo Kunishi ,  Yukio Hamaji

IPC分类号： H01G4008

CPC分类号： H01G4/232 ,  H01C1/148 ,  H01C17/283 ,  Y10T29/417 ,  Y10T29/435 ,  Y10T29/49098 ,  Y10T29/49144 ,  Y10T428/12708

摘要： An electronic part includes a body and an outer electrode formed on the surface of the body, the outer electrode comprising a plurality of layers and having a Sn plating layer as the outermost layer. The Sn plating layer has an average crystal grain size of about 1 &mgr;m or less.

摘要翻译： 电子部件包括形成在主体表面上的主体和外部电极，外部电极包括多个层，并具有Sn镀层作为最外层。 Sn镀层的平均结晶粒径为1μm以下。

公开(公告)号：US5733832A

公开(公告)日：1998-03-31

申请号：US790772

申请日：1997-01-27

申请人： Mitsutoshi Kawamoto ,  Yukio Hamaji

发明人： Mitsutoshi Kawamoto ,  Yukio Hamaji

IPC分类号： C04B35/00 ,  C04B35/46 ,  C04B35/499 ,  H01B3/12 ,  H01G4/12

CPC分类号： C04B35/499 ,  H01G4/1254

摘要： A dielectric ceramic composition composed mainly of lead magnesium-niobate �Pb(Mg.sub.1/3 Nb.sub.2/3)O.sub.3 !, strontium titanate �SrTiO.sub.3 !, and lead titanate �PbTiO.sub.3 !, characterized in that the molar ratio of said three major components is defined by �Pb(Mg.sub.1/3 Nb.sub.2/3)O.sub.3 !.sub.x .multidot.�SrTiO.sub.3 !.sub.y .multidot.�PbTiO.sub.3 !.sub.z (where x+y+z=100 parts by mole, and each value of x, y, and z is on lines or within the area enclosed by lines passing through four points A (72, 10, 18), B (76, 5, 19), C (57, 5, 38), and D (48, 20, 32) in a triangular composition diagrams), and said three major components are supplemented by (Pb.sub.1-x Ba.sub.x) (Cu.sub.1/2 W.sub.1/2)O.sub.3 (where 0.ltoreq.x.ltoreq.1) in an amount less than about 5 parts by mole (excluding 0 part by mole) for 100 parts by mole of said major components. This dielectric ceramic composition can be sintered at low temperatures and has a high permittivity and a high mechanical strength.

摘要翻译： 主要由铅铌酸镁[Pb（Mg + E，fra 1/3 + EE Nb + E，fra 2/3 + EE）O 3]，钛酸锶[SrTiO 3]和钛酸铅[PbTiO 3] 其特征在于所述三种主要成分的摩尔比由[Pb（Mg + E，fra 1/3 + EE Nb + E，fra 2/3 + EE）O 3] x x [SrTiO 3] yx [PbTiO 3] z （其中x + y + z = 100份摩尔，x，y和z的每个值在线上或在通过四个点A（72,10,18），B（76， 5，19），C（57,5,38）和D（48,20,32）在三角形组成图中），并且所述三个主要成分由（Pb1-xBax）（Cu + E， / 2 + EE W + E，fra 1/2 + EE）O 3（其中0

公开(公告)号：US5672220A

公开(公告)日：1997-09-30

申请号：US636685

申请日：1996-04-23

申请人： Nagato Omori ,  Yukio Hamaji ,  Yoshiaki Mori ,  Yukio Sakabe

发明人： Nagato Omori ,  Yukio Hamaji ,  Yoshiaki Mori ,  Yukio Sakabe

IPC分类号： H01G4/12 ,  H01G4/30 ,  H05K1/03 ,  H05K3/46 ,  C04B37/00

CPC分类号： H01G4/30 ,  H05K1/0306 ,  H05K3/4611 ,  H05K3/4629

摘要： A plurality of dielectric ceramic sheets having inner electrodes thereon are laminated and sintered. The ceramic sheets are made of a non-reducing dielectric material, and the inner electrodes are made of a base metal or a base metal alloy. After a binder removing step, the laminate is sintered in a mixed gas which contains either one or both of carbon dioxide with a purity of 99.9% or more and carbon monoxide with a purity of 99.9% or more as its main constituent and further contains hydrogen and oxygen with their densities regulated.

摘要翻译： 其上具有内电极的多个介电陶瓷片被层压并烧结。 陶瓷片由非还原电介质材料制成，内电极由贱金属或贱金属合金制成。 在粘合剂除去步骤之后，将层压体在含有纯度为99.9％以上的二氧化碳中的一种或两种作为主要成分的纯度为99.9％以上的一氧化碳的混合气体中烧结，并且还含有氢 氧气密度调节。

公开(公告)号：US5626788A

公开(公告)日：1997-05-06

申请号：US447933

申请日：1995-05-23

申请人： Shinsei Okabe ,  Yukio Hamaji

发明人： Shinsei Okabe ,  Yukio Hamaji

IPC分类号： C01G49/00 ,  C01G51/00 ,  C01G53/00 ,  C04B35/622 ,  H01F1/36 ,  C04B33/26

CPC分类号： C01G49/0018 ,  C01G49/0063 ,  C01G49/0072 ,  C01G51/00 ,  C01G53/00 ,  C01P2002/32 ,  C01P2006/42

摘要： A powder of magnetic oxides given by the general formula:MeFe.sub.2 O.sub.4where Me is at least one element of divalent metal element selected from the group consisting of Ni, Zn, Cu, Mn and Co, is produced by a method comprising the steps of preparing a magnetic oxide precursor composed of .alpha.-FeOOH and a complex carbonate compound of at least one divalent metal element deposited on surfaces of particles of .alpha.-FeOOH; and then treating the resultant magnetic oxide precursor with heat.

摘要翻译： 由通式MeFe 2 O 4给出的磁性氧化物粉末，其中Me是选自Ni，Zn，Cu，Mn和Co中的至少一种选自Ni，Zn，Cu，Mn和Co的二价金属元素，通过包括以下步骤的方法制备： 由α-FeO​​OH组成的氧化物前体和沉积在α-FeO​​OH颗粒表面上的至少一种二价金属元素的复合碳酸酯化合物; 然后用热处理所得的磁性氧化物前体。

公开(公告)号：US5432136A

公开(公告)日：1995-07-11

申请号：US278620

申请日：1994-07-21

申请人： Masamitsu Shibata ,  Yukio Hamaji

发明人： Masamitsu Shibata ,  Yukio Hamaji

IPC分类号： C04B35/468 ,  H01B3/12 ,  H01G4/12 ,  C04B35/46

CPC分类号： C04B35/4684 ,  H01B3/12 ,  H01G4/1227

摘要： The present invention is directed to a dielectric ceramic composition composed of, 97.5 to 99.95 wt. % of main component represented by, {100-(a+b+c+d)} (Ba.sub.100-x Pb.sub.x) TiO.sub.3 +aZnO+bBi.sub.2 O.sub.3 +cNb.sub.2 O.sub.5 +dRe.sub.2 O.sub.3 (0.5.ltoreq.a.ltoreq.4.5, 0.5.ltoreq.b.ltoreq.4.5, 0.5.ltoreq.c.ltoreq.4.5, 0.5.ltoreq.d.ltoreq.5.5 and 0

摘要翻译： 本发明涉及一种电介质陶瓷组合物，其组成为97.5至99.95wt。 由（{100-（a + b + c + d）}（Ba100-x Pbx）TiO3 + aZnO + bBi2O3 + cNb2O5 + dRe2O3（0.5≤a≤4.5,0.5）表示的主要成分的％ b =4.5,0.5≤c=4.5,0.5≤d≤5.5和0

公开(公告)号：US5328718A

公开(公告)日：1994-07-12

申请号：US969027

申请日：1992-10-30

申请人： Yoshio Abe ,  Yukio Hamaji ,  Yukio Sakabe

发明人： Yoshio Abe ,  Yukio Hamaji ,  Yukio Sakabe

IPC分类号： C01G23/00 ,  C04B35/46 ,  C04B35/468 ,  H01B3/00 ,  H01B3/12 ,  H01L21/314 ,  H01L21/316 ,  B05D5/12

CPC分类号： H01L21/31691 ,  H01L41/1871 ,  H01L41/317

摘要： A thin film of barium titanate is formed on a substrate by immersing the substrate in an aqueous solution containing barium ions and titanium alkoxide. The aqueous solution may contain not more than 20 vol % of one or more alkanolamines expressed by the general formula:HO(C.sub.n H.sub.2n)mNH.sub.3-mwhere n is not more than 10, and m=1, 2 or 3.

摘要翻译： 通过将基板浸入含有钡离子和钛醇盐的水溶液中，在基板上形成钛酸钡薄膜。 水溶液可以含有不多于20体积％的一种或多种由以下通式表示的链烷醇胺：HO（CnH2n）mNH3-m，其中n不大于10，m = 1,2或3。