US5223462A
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Dielectric ceramic composition
Assignee: Kyocera Corp
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Filing: 1992-01-21
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Granted: 1993-06-29
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Expires: 2012-01-21
Abstract
Abstract A dielectric ceramic composition of matter characterized in that the composition of matter contains 0.003 to 0.3% by weight manganese in addition to the main composition of matter represented by the composition formula xBaOxyNd2O3xzTiO2xwBi2O3 wherein 0.110</=x</=0.170, 0.120</=y</=0.185, 0.630</=z</= 0.710, 0.020</=w</=0.090, and x+y+z+w=1. This composition of matter is high in dielectric constant, low in the temperature dependency of resonance frequency in a resonator, and high in Q-value.
Inventors
- 👤 Takashi Okawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:54
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/468; C04B35/4682
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
73 words
In a microwave resonator device having a dielectric ceramic composition of matter, the improvement wherein said composition of matter is suitable for use in the microwave frequency band and consists essentially of a main composition represented by the composition formula xBaO ·yNd 2 O 3 ·ztiO 2 ·wBi 2 O 3 wherein 0.139≦x≦0.170, 0.120≦y≦0.185, 0.630≦z≦0.661, 0.020≦w≦0.090, and x+y+z+w=1; and 0.003 to 0.3% by weight manganese, based on the weight of said main composition.
Claim 2
Dependent Claim
73 words
In a microwave resonator device having a dielectric ceramic composition of matter, the improvement wherein said composition of matter is suitable for use in the microwave frequency band and consists essentially of a main composition represented by the composition formula xBaO ·yNd 2 O 3 ·ztiO 2 ·wBi 2 O 3 wherein 0.139≦x≦0.170, 0.120≦y≦0.185, 0.630≦z≦0.661, 0.020≦w≦0.090, and x+y+z+w=1; and 0.003 to 0.3% by weight manganese, based on the weight of said main composition.
Claim 3
Dependent Claim
82 words
In a microwave circuit device having a dielectric ceramic composition of matter, the improvement wherein said dielectric ceramic composition of matter is suitable for use in the microwave frequency band and consists essentially of a main composition represented by the composition formula xBaO·yNd 2 O 3 ·zTiO 2 ·wBi 2 O 3 wherein 0.139≦x≦0.170, 0.120≦y≦0.185, 0.630≦z≦0.661, 0.020≦w≦0.090, and y+y+z+w=1; and manganese in an amount within the range defined by +, wherein 0.003≦+≦0.1 by weight, based on the weight of said main composition.
Claim 4
Dependent Claim
82 words
In a microwave circuit device having a dielectric ceramic composition of matter, the improvement wherein said dielectric ceramic composition of matter is suitable for use in the microwave frequency band and consists essentially of a main composition represented by the composition formula xBaO·yNd 2 O 3 ·zTiO 2 ·wBi 2 O 3 wherein 0.139≦x≦0.170, 0.120≦y≦0.185, 0.630≦z≦0.661, 0.020≦w≦0.090, and y+y+z+w=1; and manganese in an amount within the range defined by +, wherein 0.003≦+≦0.1 by weight, based on the weight of said main composition.
Claim 5
Dependent Claim
19 words
A microwave circuit device as claimed in claim 2, wherein the dielectric ceramic material comprises a microwave circuit substrate.
Claim 6
Dependent Claim
18 words
A microwave circuit device as claimed in claim 2, wherein the dielectric ceramic material comprises a microwave resonator.
Claim 7
Dependent Claim
27 words
A microwave circuit device as claimed in claim 2, wherein the improved dielectric ceramic composition has a temperature coefficient + of the resonance frequency of <30 ppm/°C.
Claim 8
Dependent Claim
31 words
A microwave circuit device as claimed in claim 2, wherein the improved dielectric ceramic composition has a dielectric constant of at least 70 and a Q value of greater than 500.
Claim 9
Dependent Claim
82 words
In a microwave resonator device having a dielectric ceramic composition of matter, the improvement wherein said dielectric ceramic composition of matter is suitable for use in the microwave frequency band and consists essentially of a main composition represented by the composition formula xBaO·yNd 2 O 3 ·zTiO 2 ·wBi 2 O 3 wherein 0.139≦x≦0.170, 0.120≦y≦0.185, 0.630≦z≦0.661, 0.020≦w≦0.090, and x+y+z+w=1; and manganese in an amount within the range defined by +, wherein 0.003≦+≦0.1 by weight, based on the weight of said main composition.
Claim 10
Dependent Claim
82 words
In a microwave resonator device having a dielectric ceramic composition of matter, the improvement wherein said dielectric ceramic composition of matter is suitable for use in the microwave frequency band and consists essentially of a main composition represented by the composition formula xBaO·yNd 2 O 3 ·zTiO 2 ·wBi 2 O 3 wherein 0.139≦x≦0.170, 0.120≦y≦0.185, 0.630≦z≦0.661, 0.020≦w≦0.090, and x+y+z+w=1; and manganese in an amount within the range defined by +, wherein 0.003≦+≦0.1 by weight, based on the weight of said main composition.
Claim 11
Dependent Claim
27 words
A microwave resonator device as claimed in claim 7, wherein the improved dielectric ceramic composition has a temperature coefficient τf of the resonance frequency of <30 ppm/°C.
Claim 12
Dependent Claim
30 words
A microwave resonator device as claimed in claim 7, wherein the improved dielectric ceramic composition has a dielectric constant of at least 70 and a Q value greater than 500.
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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) | 1996-06-28 | 1996-12-28 | 1997-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-28 | 2000-12-28 | 2001-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-28 | 2004-12-28 | 2005-06-29 | $7700.00 | Window Closed / Lapsed |