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US6058005A
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Dielectric ceramic composition and monolithic ceramic capacitor using the composition
Assignee: Murata Manufacturing Co Ltd
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Filing: 1998-08-28
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Granted: 2000-05-02
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Expires: 2018-08-28
Abstract
Abstract Disclosed is a dielectric ceramic composition containing an essential component represented by the formula, xBaO-yTiO 2 -zRe 2 O 3 , wherein x, y and z are in mol %; x+y+z=100; and (x, y, z) falls within a polygonal region defined by four points of A (39.5, 59.5, 1), B (1, 59.5, 39.5), C (1, 85, 14) and D (14, 85, 1), and further containing V, Cu and Mn as side components in an amount of about 0.1 wt. % to 15 wt. % in terms of V 2 O 5 , in an amount not greater than 10 wt. % in terms of CuO, and in an amount not greater than 1 wt. % in terms of MnO, respectively, relative to 100 wt. % of the essential component.
Inventors
- 👤 Hiroaki Matoba
- 👤 Harunobu Sano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:40
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/468; H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/08; H01G4/12; H01G4/1209; H01G4/1218; H01G4/1227; H01G4/30
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
131 words
A dielectric ceramic composition containing an essential component represented by the following formula: xBaO-yTiO.sub.2 -z(ReI.sub.a ReII.sub.(1-a)).sub.2 O.sub.3 where x, y and z are in mol %; x+y+z=100; (x, y, z) falls within a polygonal region defined by four points of A(39.5, 59.5, 1), B(1, 59.5, 39.5), C(1, 85, 14) and D(14, 85, 1); 0.2<a≦1.0; ReI is at least one rare earth element selected from the group consisting of Tb, Dy, Ho, Er and Yb; and ReII is at least one rare earth element selected from the group consisting of La, Pr, Nd and Sm, and further containing V as a side component in an amount, α, of about 0.1 wt. % to 15 wt. % in terms of V 2 O 5 relative to 100 wt. % of the essential component.
Claim 2
Dependent Claim
131 words
A dielectric ceramic composition containing an essential component represented by the following formula: xBaO-yTiO.sub.2 -z(ReI.sub.a ReII.sub.(1-a)).sub.2 O.sub.3 where x, y and z are in mol %; x+y+z=100; (x, y, z) falls within a polygonal region defined by four points of A(39.5, 59.5, 1), B(1, 59.5, 39.5), C(1, 85, 14) and D(14, 85, 1); 0.2<a≦1.0; ReI is at least one rare earth element selected from the group consisting of Tb, Dy, Ho, Er and Yb; and ReII is at least one rare earth element selected from the group consisting of La, Pr, Nd and Sm, and further containing V as a side component in an amount, α, of about 0.1 wt. % to 15 wt. % in terms of V 2 O 5 relative to 100 wt. % of the essential component.
Claim 3
Dependent Claim
13 words
A dielectric ceramic composition as claimed in claim 1, wherein a is 1.
Claim 4
Dependent Claim
41 words
The dielectric ceramic composition as claimed in claim 2, which contains Cu as a side component in an amount, β, of not greater than about 10 wt. % in terms of CuO relative to 100 wt. % of the essential component.
Claim 5
Dependent Claim
41 words
The dielectric ceramic composition as claimed in claim 2, which contains Mn as a side component in an amount, γ, of not greater than about 1 wt. % in terms of MnO relative to 100 wt. % of the essential component.
Claim 6
Dependent Claim
41 words
The dielectric ceramic composition as claimed in claim 4, which contains Cu as a side component in an amount, β, of not greater than about 10 wt. % in terms of CuO relative to 100 wt. % of the essential component.
Claim 7
Dependent Claim
34 words
The dielectric ceramic composition as claimed in claim 5, wherein α is between about 2 and about 4, β is between about 2 and about 4, and γ is not greater than about 0.05.
Claim 8
Dependent Claim
28 words
The dielectric ceramic composition as claimed in claim 6, wherein (x, y, z) is about (10, 70, 20) and ReI is at least one of Ho and Er.
Claim 9
Dependent Claim
15 words
A dielectric ceramic composition as claimed in claim 1, wherein a is less than 1.
Claim 10
Dependent Claim
41 words
The dielectric ceramic composition as claimed in claim 8, which contains Cu as a side component in an amount, β, of not greater than about 10 wt. % in terms of CuO relative to 100 wt. % of the essential component.
Claim 11
Dependent Claim
41 words
The dielectric ceramic composition as claimed in claim 8, which contains Mn as a side component in an amount, γ, of not greater than about 1 wt. % in terms of MnO relative to 100 wt. % of the essential component.
Claim 12
Dependent Claim
41 words
The dielectric ceramic composition as claimed in claim 10, which contains Cu as a side component in an amount, β, of not greater than about 10 wt. % in terms of CuO relative to 100 wt. % of the essential component.
Claim 13
Dependent Claim
34 words
The dielectric ceramic composition as claimed in claim 11, wherein α is between about 2 and about 4, β is between about 2 and about 4, and γ is not greater than about 0.05.
Claim 14
Dependent Claim
68 words
A monolithic ceramic capacitor comprising: a ceramic layer; a plurality of inner electrodes which are embedded inside the ceramic layer, each of the electrodes being disposed so as to be apart from one another in the ceramic layer; and outer electrodes on outer surfaces of the ceramic layer electrically conducted to the inner electrodes; wherein the ceramic layer is of a dielectric ceramic composition according to claim 1.
Claim 15
Dependent Claim
15 words
The monolithic ceramic capacitor as claimed in claim 13, wherein the inner electrodes are Pd-Ag.
Claim 16
Dependent Claim
68 words
A monolithic ceramic capacitor comprising: a ceramic layer; a plurality of inner electrodes which are embedded inside the ceramic layer, each of the electrodes being disposed so as to be apart from one another in the ceramic layer; and outer electrodes on outer surfaces of the ceramic layer electrically conducted to the inner electrodes; wherein the ceramic layer is of a dielectric ceramic composition according to claim 2.
Claim 17
Dependent Claim
15 words
The monolithic ceramic capacitor as claimed in claim 15, wherein the inner electrodes are Pd-Ag.
Claim 18
Dependent Claim
68 words
A monolithic ceramic capacitor comprising: a ceramic layer; a plurality of inner electrodes which are embedded inside the ceramic layer, each of the electrodes being disposed so as to be apart from one another in the ceramic layer; and outer electrodes on outer surfaces of the ceramic layer electrically conducted to the inner electrodes; wherein the ceramic layer is of a dielectric ceramic composition according to claim 6.
Claim 19
Dependent Claim
68 words
A monolithic ceramic capacitor comprising: a ceramic layer; a plurality of inner electrodes which are embedded inside the ceramic layer, each of the electrodes being disposed so as to be apart from one another in the ceramic layer; and outer electrodes on outer surfaces of the ceramic layer electrically conducted to the inner electrodes; wherein the ceramic layer is of a dielectric ceramic composition according to claim 8.
Claim 20
Dependent Claim
15 words
The monolithic ceramic capacitor as claimed in claim 18, wherein the inner electrodes are Pd-Ag.
Claim 21
Dependent Claim
68 words
A monolithic ceramic capacitor comprising: a ceramic layer; a plurality of inner electrodes which are embedded inside the ceramic layer, each of the electrodes being disposed so as to be apart from one another in the ceramic layer; and outer electrodes on outer surfaces of the ceramic layer electrically conducted to the inner electrodes; wherein the ceramic layer is of a dielectric ceramic composition according to claim 11.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-05-02 | 2003-11-01 | 2004-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-05-02 | 2007-11-01 | 2008-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-05-02 | 2011-11-01 | 2012-05-02 | $7700.00 | Window Closed / Lapsed |