Tdk Corporation

Raitarou Masaoka

Shohei Fujii

Hiroki Uchiyama

Maiko Shirokawa

Yusuke Oba

Takashi Suzuki

Yukio Takahashi

Toshihiko Kaneko

Toshio Sakurai

Kyung-Ku Choi

Yuki Yamashita

Shirou Ootsuki

Kiyoshi Hatanaka

Ryuichi Wada

Tomohiro Arashi

Saori Takeda

Hiroshi Momoi

Yuji Sezai

Shou Kawadahara

Maiko Nakamura

Noriko Ogasawara

A dielectric film comprises a complex oxide represented by a general formula xAO-yBO-zCOas a main component, wherein A is at least one selected from barium, calcium and strontium, B is at least one selected from magnesium and zinc, C is at least one selected from niobium and tantalum, x, y and z satisfy relations: x+y+z=1.000, 0.375&#x2264;x&#x2264;0.563, 0.250&#x2264;y&#x2264;0.500, and x/3&#x2264;z&#x2264;(x/3)+1/9, and in an X-ray diffraction chart of the dielectric film, a diffraction peak intensity of a (211) plane of the complex oxide or a diffraction peak intensity of a (222) plane of the complex oxide is larger than a diffraction peak intensity of a (110) plane of the complex oxide.

Dielectric film and electronic component

A dielectric film comprises a complex oxide represented by a general formula xAO-yBO-zCOas a main component, wherein A is at least one selected from barium, calcium and strontium, B is at least one selected from magnesium and zinc, C is at least one selected from niobium and tantalum, x, y and z satisfy relations: x+y+z=1.000, 0.375&#x2264;x&#x2264;0.563, 0.250&#x2264;y&#x2264;0.500, and x/3&#x2264;z&#x2264;(x/3)+1/9, and a full width at half maximum of a diffraction peak of a (110) plane of the complex oxide is 0.40&#xb0; or more in an X-ray diffraction chart of the dielectric film.

A dielectric composition having a high relative dielectric constant and high Q value even at high frequencies, and an electronic component including a dielectric film configured from the dielectric composition. This dielectric composition includes the composite oxide represented by general formula (aCaO+bSrO)&#x2014;ZrOas a main component, and by a and b satisfying the relationships a&#x2265;0, b&#x2265;0, and 1.50&#x3c;a+b&#x2264;4.00.

Dielectric composition and electronic component

A dielectric thin film containing MgO as a main component, wherein the dielectric thin film is composed of a columnar structure group containing at least one columnar structure A constructed by single crystal and at least one columnar structure B constructed by polycrystal, respectively, and in the cross section of the direction perpendicular to the dielectric thin film, when the area occupied by the columnar structure A is set as Cand the area occupied by the columnar structure B is set as C, the relationship between Cand Csatisfies 0.4&#x2264;C/C&#x2264;1.1.

Dielectric thin film and electronic component

A dielectric film containing an alkaline earth metal oxide having a NaCl type crystal structure as a main component, wherein the dielectric film has a (111)-oriented columnar structure in a direction perpendicular to the surface of the dielectric film, and in a Cu&#x2014;K&#x3b1; X-ray diffraction chart of the dielectric film, a half width of the diffraction peak of (111) is in a range of from 0.3&#xb0; to 2.0&#xb0;.

A dielectric composition containing a complex oxide represented by the formula of ABCOas the main component, wherein A represents Ba, B represents at least one element selected from the group consisting of Ca and Sr, C represents at least one element selected from the group consisting of Ta and Nb, and &#x3b1;, &#x3b2; and &#x3b3; meet the following conditions, i.e., &#x3b1;+&#x3b2;+&#x3b3;=1.000, 0.000&#x3c;&#x3b1;&#x2266;0.375, 0.625&#x2266;&#x3b2;&#x3c;1.000, 0.000&#x2266;&#x3b3;&#x2266;0.375.

A dielectric composition containing a complex oxide represented by the formula of xAO-yBO-zCOas the main component, wherein A represents at least one element selected from the group including Ba, Ca and Sr, B represents Mg, and C represents at least one element selected from the group including Nb and Ta, and x, y and z meet the following conditions, x+y+z=1.000, 0.000&#x3c;x&#x2266;0.281, 0.625&#x2266;y&#x3c;1.000, and 0.000&#x3c;z&#x2266;0.375.

A dielectric composition containing a complex oxide represented by the formula of xAO-yBO-zCOas the main component, wherein A represents at least one element selected from the group including Ba, Ca and Sr, B represents Mg, and C represents at least one element selected from the group including Nb and Ta, and x, y and z meet the following conditions, x+y+z=1.000, 0.198&#x2266;x&#x2266;0.375, 0.389&#x2266;y&#x2266;0.625, and x/3&#x2266;z&#x2266;x/3+1/9.

A dielectric composition contains major components that are an A-group containing major components that are at least two selected from the group consisting of Ba, Ca, and Sr and a B-group which contains a major component that is selected from Zr and Ti and which contains at least Zr. The dielectric composition contains an amorphous substance containing the A-group and the B-group and a crystalline substance containing the A-group and the B-group. In the dielectric composition, the inequality 0.5&#x2266;&#x3b1;&#x2266;1.5 holds, where &#x3b1; is the molar ratio of the A-group to the B-group.

A dielectric composition contains a complex oxide represented by the formula of xAO-yB'O-zB&#x2033;Oas the main component, wherein A represents at least one element selected from the group made of Ba, Ca and Sr, B&#x2032; represents at least one element selected from the group made of Mg, Zn and Ni, B&#x2033; represents at least one element selected from the group made of Nb and Ta, and x, y and z meet the following conditions, x+y+z=1.000, 0.375&#x2266;x&#x2266;0.563, 0.250&#x2266;y&#x2266;0.500, and x/3&#x2266;z&#x2266;x/3+1/9. An electronic component using the dielectric composition is also provided.

A dielectric ceramic composition includes a component represented by composition formula {&#x3b1;(xBaO.yNdO.zTiO)+&#x3b2;(2MgO.SO)} as a main component and zinc oxide, boron oxide, and a glass having a softening point equal to or lower than a certain temperature as minor components with respect to the main component. In the dielectric ceramic composition, x, y, and z that respectively represent molar ratios of BaO, NdO, and TiOare in certain ranges and &#x3b1; and &#x3b2; that represent volume ratios of subcomponents (xBaO.yNdO.zTiOand 2MgO.SiO) in the main component are in certain ranges. When the minor components are respectively represented by aZnO, bBO, and cglass, a, b, and c that represent mass ratios of the respective minor components to the main component are in certain ranges.

Dielectric ceramic composition

A ferrite composition includes a main component having 46.0 to 49.8 mol % of an iron oxide in terms of FeO, 5.0 to 14.0 mol % of a copper oxide in terms of CuO and 8.0 to 32.0 mol % of a zinc oxide in terms of ZnO, and a remainder of the main component is composed of a nickel oxide; and as subcomponents, with respect to 100 wt % of the main component, 0.5 to 6.0 wt % of a silicon oxide in terms of SiOand 0.01 to 2.0 wt % of a boron oxide in terms of BO. Further, as a subcomponent, 0.01 to 0.17 wt % of potassium oxide in terms of KO or 0.3 to 2.0 wt % of tin oxide in terms of SnOmay be included.

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Tokyo, Japan

Raitarou Masaoka