US5790367A
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Multilayer capacitor comprising a dielectric of modified barium strontium titanate
Assignee: DMC2 ELECTRONIC MATERIALS BV
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Filing: 1996-12-10
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Granted: 1998-08-04
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Expires: 2016-12-10
Abstract
Abstract A capacitor having a ceramic dielectric and at least two electrodes, the ceramic dielectric being predominantly composed of a dielectric, ceramic composition having a main component of BaTiO 3 and/or Ba 1-y Sr y !Ti x O 31 z, wherein 0.95≦x≦0.995, 0≦y≦0.04, z=2(1-x), and having at least an additive of the group formed by XMnO 3 , X 2 MoO 6 , X 2 WO 6 , X 2 SiO 5 +Mn 2 SiO 4 and Li 2 SiO 3 +Mn 2 SiO 4 , and at least an additive of the group formed by Li 2 SiO 3 , SiO 2 and a mixture of 6 mol % Li 2 O, 13 mol % BaO, 13 mol % SrO, 13 mol % MgO and 55 mol % SiO 2 , which is calcined at 800° C., and, if necessary, an additive of the group formed by XInO 3 , XGaO 3 and XAlO 3 , wherein X is one or more elements of the group formed by Y, Dy and Er, is characterized by a flat ΔC/Δt curve and a stable dielectric behavior on exposure to temperature and voltage influences.
Inventors
- 👤 Dieter Mateika
- 👤 Petra Huppertz
- 👤 Knuth Albertsen
- 👤 Oliver Steigelmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:57
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; H; H01; H01B; H01B3/00; H01B3/02; H01B3/12; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/08; H01G4/12; H01G4/1209; H01G4/1218; H01G4/1227
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
144 words
A capacitor comprising a ceramic dielectric and at least two electrodes, said ceramic dielectric consisting essentially of a dielectric, ceramic composition having a main component of BaTiO 3 and/or Ba 1-y Sr y !Ti 3-z , wherein 0.95≦x≦0.995, 0≦y≦0.04,z=2(1-x), an additive of the group formed by XMnO 3 , X 2 MoO 6 , X 2 WO 6 , X 2 SiO 5 +Mn 2 SiO 4 and Li 2 SiO 3 +Mn 2 SiO 4 , and at an additive of the group formed by Li 2 SiO 3 , SiO 2 and a mixture of 6 mol % Li 2 O, 13 mol % BaO, 13 mol % SrO, 13 mol % MgO and 55 mol % SiO 2 , which is calcined at 800° C., wherein X is one or more elements of the group formed by Y, Dy and Er.
Claim 2
Dependent Claim
144 words
A capacitor comprising a ceramic dielectric and at least two electrodes, said ceramic dielectric consisting essentially of a dielectric, ceramic composition having a main component of BaTiO 3 and/or Ba 1-y Sr y !Ti 3-z , wherein 0.95≦x≦0.995, 0≦y≦0.04,z=2(1-x), an additive of the group formed by XMnO 3 , X 2 MoO 6 , X 2 WO 6 , X 2 SiO 5 +Mn 2 SiO 4 and Li 2 SiO 3 +Mn 2 SiO 4 , and at an additive of the group formed by Li 2 SiO 3 , SiO 2 and a mixture of 6 mol % Li 2 O, 13 mol % BaO, 13 mol % SrO, 13 mol % MgO and 55 mol % SiO 2 , which is calcined at 800° C., wherein X is one or more elements of the group formed by Y, Dy and Er.
Claim 3
Dependent Claim
142 words
A capacitor as claimed in claim 1, wherein the dielectric comprises an additive of the group formed by 0.05 to 3 mol % XMnO 3 , 0.025 to 3 mol % X 2 MoO 6 , 0.025 to 3 mol % X 2 WO 6 , 0.1 to 2 mol % X 2 SiO 5 +Mn 2 SiO 4 , 0.1 to 2 mol % Li 2 SiO 3 +Mn 2 SiO 4 , and at least an additive of the group formed by 0.1 to 3 mol % Li 2 SiO 3 , 0.1 to 3 mol % SiO 2 , 0.2 to 2.5 wt. % of a mixture of 6 mol % Li 2 O, 13 mol % BaO, 13 mol % SrO, 13 mol % MgO and 55 mol % SiO 2 , which is calcined at 800° C.
Claim 4
Dependent Claim
82 words
A capacitor as claimed in claim 1 comprising an additive selected from the group consisting of 0.03 mol % XMnO 3 , 0.01 mol % X 2 MoO 6 and 0.002 mol % X 2 WO 6 , and a further additive formed by 1.0 wt. % of a mixture of 6 mol % Li 2 O, 13 mol % BaO, 13 mol % SrO, 13 mol % MgO and 55 mol % SiO 2 , which is calcined at 800° C.
Claim 5
Dependent Claim
19 words
A capacitor as claimed in claim 1, in which the said at least two electrodes are made of nickel.
Claim 6
Dependent Claim
118 words
A ceramic dielectric composition comprising a main component of BaTiO 3 and/or Ba 1-y Sr y !Ti x O 3-z , wherein 0.95≦x≦0.995, 0≦y≦0.04,z=2(1-x), an additive selected from the group consisting of XMnO 3 , X 2 MoO 6 , X 2 WO 6 , X 2 SiO 5 +Mn 2 SiO 4 , and Li 2 SiO3+Mn2SiO 4 , wherein X is Y, Dy or Er and an additive selected from the group consisting of Li 2 SiO 3 , SiO 2 and a mixture of 6 mol % Li 2 O, 13 mol % BaO, 13 mol % SrO, 13 mol % MgO and 55 mol % SiO 2 , which is calcined at 800° C.
Claim 7
Dependent Claim
118 words
A ceramic dielectric composition comprising a main component of BaTiO 3 and/or Ba 1-y Sr y !Ti x O 3-z , wherein 0.95≦x≦0.995, 0≦y≦0.04,z=2(1-x), an additive selected from the group consisting of XMnO 3 , X 2 MoO 6 , X 2 WO 6 , X 2 SiO 5 +Mn 2 SiO 4 , and Li 2 SiO3+Mn2SiO 4 , wherein X is Y, Dy or Er and an additive selected from the group consisting of Li 2 SiO 3 , SiO 2 and a mixture of 6 mol % Li 2 O, 13 mol % BaO, 13 mol % SrO, 13 mol % MgO and 55 mol % SiO 2 , which is calcined at 800° C.
Claim 8
Dependent Claim
166 words
A capacitor comprising a ceramic dielectric and at least two electrodes, said ceramic dielectric consisting essentially of a dielectric ceramic composition having a main component of BaTiO 3 and/or Ba 1-y Sr y !Ti x O 3-z , wherein 0.95≦x≦0.995,0≦y≦0.04,z=2(1-x), at least one additive selected from the group consisting of XnNO 3 , X 2 MoO 6 , X 2 WO 6 , a mixture of X 2 SiO 5 and Mn 2 SiO 4 and a mixture of Li 2 SiO 3 and Mn 2 SiO 4 , at least one additive selected from the group consisting of Li 2 SiO 3 , SiO 2 and a mixture of 6 mol.% Li 2 O, 13 mol.% BaO, 13 mol% MgO and 55 mol.% SiO 2 , calcined at 800° C., and an additive selected from the group consisting of XInO 3 , XGaO 3 and XAlO 3 , wherein X is at least one element selected from the group consisting of Y, Dy and Er.
Claim 9
Dependent Claim
166 words
A capacitor comprising a ceramic dielectric and at least two electrodes, said ceramic dielectric consisting essentially of a dielectric ceramic composition having a main component of BaTiO 3 and/or Ba 1-y Sr y !Ti x O 3-z , wherein 0.95≦x≦0.995,0≦y≦0.04,z=2(1-x), at least one additive selected from the group consisting of XnNO 3 , X 2 MoO 6 , X 2 WO 6 , a mixture of X 2 SiO 5 and Mn 2 SiO 4 and a mixture of Li 2 SiO 3 and Mn 2 SiO 4 , at least one additive selected from the group consisting of Li 2 SiO 3 , SiO 2 and a mixture of 6 mol.% Li 2 O, 13 mol.% BaO, 13 mol% MgO and 55 mol.% SiO 2 , calcined at 800° C., and an additive selected from the group consisting of XInO 3 , XGaO 3 and XAlO 3 , wherein X is at least one element selected from the group consisting of Y, Dy and Er.
Claim 10
Dependent Claim
160 words
A capacitor as claimed in claim 6, comprising an additive selected from the group consisting of 0.05 to 3 mol % XMnO 3 , 0.025 to 3 % mol % X 2 WO 6 , 0.1 to 2 mol % X 2 SiO 5 +Mn 2 SiO 4 , 0.1 to 2 % mol % Li 2 SiO 3 +Mn 2 SiO 4 , an additive selected from the group consisting of 0.1 to 3 mol % Li 2 SiO 3 , 0.1 to 3 mol % SiO 2 and 0.2 to 2.5 wt. % of a mixture of 6 mol % Li 2 O, 13 mol % BaO, 13 mol % SrO, 13mol % MgO and 55 mol % SiO 2 , which is calcined at 800° C. and an additive of the group consisting of 0.025 to 10 mol % XInO, 0.025 to 10 mol % XGaO 3 , and 0.025 to 10 mol % XAlO 3 .
Claim 11
Dependent Claim
19 words
A capacitor as claimed in claim 6 in which the said at least two electrodes are made of nickel.
Claim 12
Dependent Claim
156 words
A ceramic dielectric consisting essentially of a dielectric ceramic composition having a main component of BaTiO 3 and/or Ba 1-y Sr y !Ti x O 3-z , wherein 0.95≦x≦0.995,0≦y≦0.04, z=2(1-x), at least one additive selected from the group consisting of XMnO 3 , X 2 MoO 6 , X 2 WO 6 , a mixture of X 2 SiO 5 and Mn 2 SiO 4 and a mixture of Li 2 SiO 3 and Mn 2 SiO 4 , at least one additive selected from the group consisting of Li 2 SiO 3 , SiO 2 and a mixture of 6 mol.% Li 2 O, 13 mol.% BaO, 13 mol% MgO and 55 mol.% SiO 2 , calcined at 800° C., and an additive selected from the group consisting of XInO 3 , XGaO 3 and XAlO 3 , wherein X is at least one element selected from the group consisting of Y, Dy and Er.
Claim 13
Dependent Claim
156 words
A ceramic dielectric consisting essentially of a dielectric ceramic composition having a main component of BaTiO 3 and/or Ba 1-y Sr y !Ti x O 3-z , wherein 0.95≦x≦0.995,0≦y≦0.04, z=2(1-x), at least one additive selected from the group consisting of XMnO 3 , X 2 MoO 6 , X 2 WO 6 , a mixture of X 2 SiO 5 and Mn 2 SiO 4 and a mixture of Li 2 SiO 3 and Mn 2 SiO 4 , at least one additive selected from the group consisting of Li 2 SiO 3 , SiO 2 and a mixture of 6 mol.% Li 2 O, 13 mol.% BaO, 13 mol% MgO and 55 mol.% SiO 2 , calcined at 800° C., and an additive selected from the group consisting of XInO 3 , XGaO 3 and XAlO 3 , wherein X is at least one element selected from the group consisting of Y, Dy and Er.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2001-08-03 | 2002-02-02 | 2002-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-08-03 | 2006-02-02 | 2006-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-08-03 | 2010-02-02 | 2010-08-04 | $7700.00 | Window Closed / Lapsed |