Patent US5202814A successfully refreshed from Google Patents.
US5202814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonreducing dielectric ceramic composition
Assignee: Murata Manufacturing Co Ltd
•
Filing: 1992-06-24
•
Granted: 1993-04-13
•
Expires: 2012-06-24
Abstract
Abstract A nonreducing dielectric ceramic composition. A main component includes oxides of Ba, Ca, Mg, Sr, Ce, Ti and Zr, and in the general formula represented by (Ba l-m-n-o Sr l Ca m Mg n Ce o ) q (Ti 1-p Zr p )O 3 . In this formula l, m, n, o, p and q satisfy the relationships, 0.05≦l≦0.30, 0.005≦m≦0.22, 0.0005≦n≦0.05, 0.0005≦o≦0.02, 0≦p≦0.20, 1.002≦q≦l.03. The composition includes between 0.02 to 2.0 mole % of one or more of the following oxides MnO 2 , Fe 2 O 3 , Cr 2 O 3 and CoO.
Inventors
- 👤 Yoshiaki Kohno
- 👤 Nobuyuki Wada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:52
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/08; H01G4/12; H01G4/1209; H01G4/1236; H01G4/1245; C; C04; C04B; C04B35/00; C04B35/01; C04B35/48; C04B35/49
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
101 words
A monolithic ceramic capacitor, comprising a dielectric ceramic body including a multi-layer body of dielectric ceramic material, an internal electrode located in said dielectric ceramic body, the internal electrode comprising nickel, and an external electrode located at an edge portion of said dielectric ceramic body, the external electrode being connected to said internal electrode, wherein said dielectric ceramic material comprises a main component consisting of respective oxides of Ba, Ca, Mg, Sr, Ce, Ti and Zr, the main component having the following formula: (Ba.sub.1-l-m-n-o Sr.sub.l Ca.sub.m Mg.sub.n Ce.sub.o).sub.q (Ti.sub.1-p Zr.sub.p)O.sub.3 wherein l, m, n, o, p and q are the following:
Claim 2
Dependent Claim
101 words
A monolithic ceramic capacitor, comprising a dielectric ceramic body including a multi-layer body of dielectric ceramic material, an internal electrode located in said dielectric ceramic body, the internal electrode comprising nickel, and an external electrode located at an edge portion of said dielectric ceramic body, the external electrode being connected to said internal electrode, wherein said dielectric ceramic material comprises a main component consisting of respective oxides of Ba, Ca, Mg, Sr, Ce, Ti and Zr, the main component having the following formula: (Ba.sub.1-l-m-n-o Sr.sub.l Ca.sub.m Mg.sub.n Ce.sub.o).sub.q (Ti.sub.1-p Zr.sub.p)O.sub.3 wherein l, m, n, o, p and q are the following:
Claim 3
Dependent Claim
53 words
05≦l≦0.30 0.005≦m≦0.22 0.0005≦n≦0.05 0.0005≦o≦0.02 0≦p≦0.02 1.002≦q≦1.03, and wherein for 100 mole % of said main component, the dielectric ceramic material includes between 0.02 to 2.0 mole % of an oxide selected from the group consisting of MnO 2 , Fe 2 O 3 , Cr 2 O 3 , CoO and mixtures thereof.
Claim 4
Dependent Claim
53 words
05≦l≦0.30 0.005≦m≦0.22 0.0005≦n≦0.05 0.0005≦o≦0.02 0≦p≦0.02 1.002≦q≦1.03, and wherein for 100 mole % of said main component, the dielectric ceramic material includes between 0.02 to 2.0 mole % of an oxide selected from the group consisting of MnO 2 , Fe 2 O 3 , Cr 2 O 3 , CoO and mixtures thereof.
Claim 5
Dependent Claim
21 words
The monolithic ceramic capacitor according to claim wherein the crystal grain diameter of said dielectric ceramic body is below 3 μm.
References Cited (Backward Citations)
JPS5076112A
Cited
US4115493A
Cited
US4386985A
Cited
JPS5717463A
Cited
US4468472A
Cited
US4863883A
Cited
US4767732A
Cited
US4987108A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-04-12 | 1996-10-12 | 1997-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-12 | 2000-10-12 | 2001-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-12 | 2004-10-12 | 2005-04-13 | $7700.00 | Window Closed / Lapsed |