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DIELECTRIC MATERIAL FOR MULTILAYER CERAMIC CAPACITOR, AND MULTILAYER CERAMIC CAPACITOR
PROBLEM TO BE SOLVED: To provide a multilayer ceramic capacitor which has satisfactory life and voltage endurance characteristics even if a dielectric layer is 0.8 μm or less in thickness.SOLUTION: A dielectric material comprises: ceramic powder having an additive element X which is at least one element selected from a group consisting of Ba, Ti, Mo, Ta, Nb and W. In the dielectric material, the standard deviation/mean value of ratios of peak intensities (XKα) of the additive element X vs. peak intensities of the Ti(TiKα), which are measured by an STEM-EDX at a total five points consisting of three points that quadrisect a maximum diameter of a particle of the ceramic powder, and two of three points that quadrisect a diameter orthogonal to the maximum diameter at its midpoint, excluding the midpoint, is less than 10.5%. The dielectric material is used to manufacture a dielectric layer.SELECTED DRAWING: None
【課題】誘電体層厚が０．８μｍ以下であっても、寿命特性および耐電圧特性が良好である積層セラミックコンデンサを提供する。【解決手段】Ｂａ、Ｔｉ並びにＭｏ、Ｔａ、Ｎｂ及びＷからなる群より選ばれる少なくとも一種の元素である添加元素Ｘを有するセラミック粉末を含み、前記セラミック粉末の一の粒子の最大直径を四等分する３点及び当該最大直径の中点において直交する直径を四等分する３点のうち中点以外の２点の合計５点においてＳＴＥＭ−ＥＤＸで測定した前記添加元素Ｘのピーク強度（ＸＫα）と前記Ｔｉ（ＴｉＫα）とのピーク強度の比の標準偏差／平均値が１０．５％未満である、誘電体材料を用いて誘電体層を作製する。【選択図】なし
DIELECTRIC MATERIAL FOR MULTILAYER CERAMIC CAPACITOR, AND MULTILAYER CERAMIC CAPACITOR
PROBLEM TO BE SOLVED: To provide a multilayer ceramic capacitor which has satisfactory life and voltage endurance characteristics even if a dielectric layer is 0.8 μm or less in thickness.SOLUTION: A dielectric material comprises: ceramic powder having an additive element X which is at least one element selected from a group consisting of Ba, Ti, Mo, Ta, Nb and W. In the dielectric material, the standard deviation/mean value of ratios of peak intensities (XKα) of the additive element X vs. peak intensities of the Ti(TiKα), which are measured by an STEM-EDX at a total five points consisting of three points that quadrisect a maximum diameter of a particle of the ceramic powder, and two of three points that quadrisect a diameter orthogonal to the maximum diameter at its midpoint, excluding the midpoint, is less than 10.5%. The dielectric material is used to manufacture a dielectric layer.SELECTED DRAWING: None
【課題】誘電体層厚が０．８μｍ以下であっても、寿命特性および耐電圧特性が良好である積層セラミックコンデンサを提供する。【解決手段】Ｂａ、Ｔｉ並びにＭｏ、Ｔａ、Ｎｂ及びＷからなる群より選ばれる少なくとも一種の元素である添加元素Ｘを有するセラミック粉末を含み、前記セラミック粉末の一の粒子の最大直径を四等分する３点及び当該最大直径の中点において直交する直径を四等分する３点のうち中点以外の２点の合計５点においてＳＴＥＭ−ＥＤＸで測定した前記添加元素Ｘのピーク強度（ＸＫα）と前記Ｔｉ（ＴｉＫα）とのピーク強度の比の標準偏差／平均値が１０．５％未満である、誘電体材料を用いて誘電体層を作製する。【選択図】なし
DIELECTRIC MATERIAL FOR MULTILAYER CERAMIC CAPACITOR, AND MULTILAYER CERAMIC CAPACITOR
積層セラミックコンデンサ用誘電体材料および積層セラミックコンデンサ
NAGAOKA KUNIHIKO (author) / HIROI KAZUMICHI (author) / RYU MINORU (author) / KAWAMURA TOMOHARU (author)
2017-06-15
Patent
Electronic Resource
Japanese
Dielectric material for multilayer ceramic capacitor, and multilayer ceramic capacitor
| European Patent Office | 2018
DIELECTRIC MATERIAL FOR MULTILAYER CERAMIC CAPACITOR, AND MULTILAYER CERAMIC CAPACITOR
| European Patent Office | 2017
| European Patent Office | 2015