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    誘電体薄膜、容量素子および電子部品
    1.
    发明专利
    誘電体薄膜、容量素子および電子部品 有权

    公开(公告)号：JPWO2017057745A1

    公开(公告)日：2017-10-05

    申请号：JP2017514710

    申请日：2016-09-30

    Applicant: Tdk株式会社 ,  Tdk株式会社

    Inventor： 久美子 山▲崎▼ ,  久美子 山▲崎▼ ,  功 中畑 ,  功 中畑

    IPC: C23C14/06 ,  C04B35/462 ,  C04B35/495 ,  H01G4/33

    CPC classification number: C04B35/00 ,  C04B35/462 ,  C23C14/06 ,  C23C14/24 ,  H01B3/00 ,  H01G4/12 ,  H01G4/33

    Abstract: 【課題】金属酸窒化物に含有されている窒素量を低く制御しても、高い比誘電率と高い絶縁性とを両立できる誘電体薄膜を提供する。【解決手段】ペロブスカイト構造を有する誘電体組成物からなる誘電体薄膜であって、誘電体組成物は、化学式MazMbOxNy(MaはSr、Ba、Ca、La、Ce、Pr、Nd、Naから選ばれる1種以上の元素、MbはTa、Nb、Ti、Wから選ばれる1種以上の元素、Oは酸素、Nは窒素)で表される組成を有し、Maがペロブスカイト構造におけるAサイトを占めた場合に示すイオン価数をa、Mbがペロブスカイト構造におけるBサイトを占めた場合に示すイオン価数をbとした場合、aおよびbが6.7≦a+b≦7.3であり、x、y、zが0.8≦z≦1.2、2.450≦x≦3.493、0.005≦y≦0.700であり、MaとMbを含む金属酸窒化物固溶体である誘電体薄膜。【選択図】図4

    Magnetic ferrite powder
    4.
    发明专利
    Magnetic ferrite powder 有权

    公开(公告)号：JP3775715B2

    公开(公告)日：2006-05-17

    申请号：JP35813999

    申请日：1999-12-16

    Applicant: Tdk株式会社

    Inventor： 功 中畑 ,  敦之 中野

    IPC: C01G49/00 ,  H01F1/34 ,  C04B35/26 ,  H01F27/00 ,  H01F41/02

    CPC classification number: H01F41/0246

    Abstract: PROBLEM TO BE SOLVED: To obtain a magnetic ferrite having less degradation in magnetic characteristic against a stress, especially in magnetic permeability μ, capable of calcinating at a low temperature, i.e., calcinating at or lower than a melting point of Ag or Ag alloy used as an electrode material, and at a low cost. SOLUTION: This laminate type ferrite part is produced by using powder of a magnetic ferrite having composition of 40-51 mol% Fe2O3, 7-30 mol% CuO, 0.5-35 mol% ZnO and 5-35 mol% MgO, and a peak position of its particle size distribution in 0.3-1.2 μm range. The above MgCuZn ferrite shows less degradation in magnetic permeability μ, and since it uses the powder having the peak position of particle size distribution at 0.3-1.2 μm range, it is possible to perform a simultaneous calcination with internal electrodes consisting of Ag or Ag alloy.

    Production method and a method of manufacturing multilayer ferrite components of magnetic ferrite
    8.
    发明专利
    Production method and a method of manufacturing multilayer ferrite components of magnetic ferrite 有权

    公开(公告)号：JP3696016B2

    公开(公告)日：2005-09-14

    申请号：JP35814199

    申请日：1999-12-16

    Applicant: Tdk株式会社

    Inventor： 功 中畑 ,  敦之 中野

    IPC: C04B35/622 ,  B22F3/00 ,  C04B35/26 ,  C22C29/12 ,  H01F1/34 ,  H01F41/02

    Abstract: PROBLEM TO BE SOLVED: To provide a methods for manufacturing magnetic ferrite at a low cost, where deterioration of magnetic characteristic, in particular, of permeability μ to stress is low, and low temperature baking, i.e., baking at a temperature lower than or equal to the melting point of Ag or Ag alloy becomes possible. SOLUTION: One or two or more kinds among MgO, Mg(OH)2 and MgCO3, Fe2O3 powder, CuO powder and ZnO powder are used as the material powder and calcinated at a temperature of at most 900 deg.C. After calcination, the powder is ground and the peak position of particle size distribution lies in the rage of 0.3-1.2 μm. By using the powder, baking at a temperature of at most 940 deg.C is enabled. As a result, a laminated ferrite component can be manufactured through baking simultaneously with Ag.

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