Patent US5767030A successfully refreshed from Google Patents.
US5767030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High frequency dielectric ceramic composition and fabrication method thereof
Assignee: Korea Institute of Science and Technology
•
Filing: 1996-09-05
•
Granted: 1998-06-16
•
Expires: 2016-09-05
Abstract
Abstract An improved high frequency dielectric ceramic composition and a fabrication method thereof, which is sintered at a low temperature ranging from 900° to 1250° C. without using a sintering aid and which has a fine structure and excellent dielectric characteristics, which includes of TiO 2 ·x(ZnO) where 0.04≦x≦1.0.
Inventors
- 👤 Hyo Tae Kim
- 👤 Yoon Ho Kim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:23
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/64; C04B35/01; C04B35/453; C04B35/46; C04B35/462; C04B35/626; C04B35/62605; C04B35/6261; H; H01; H01B; H01B3/00; H01B3/02; H01B3/12; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3284; C04B2235/65; C04B2235/656; C04B2235/6567
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
31 words
A high frequency dielectric ceramic composition consisting of TiO 2 ·x(ZnO) wherein 0.04≦x≦1.0, and the composition has a dielectric constant of 18-53 and a quality factor of 1900-4747 at 5-12 GHz.
Claim 2
Dependent Claim
31 words
A high frequency dielectric ceramic composition consisting of TiO 2 ·x(ZnO) wherein 0.04≦x≦1.0, and the composition has a dielectric constant of 18-53 and a quality factor of 1900-4747 at 5-12 GHz.
Claim 3
Dependent Claim
37 words
The composition according to claim 1, wherein said Zn is substituted with a member selected from the group consisting of Ca, Ba and Sr to satisfy the following formula: x TiO 3-x , wherein 0.04≦x≦1.0, and 0<y≦0.90.
Claim 4
Dependent Claim
14 words
The composition according to claim 2, wherein x is in the range of 0.5≦x≦1.0.
References Cited (Backward Citations)
US4610968A
Cited
GB2166431A
Cited
US4670409A
Cited
US4665041A
Cited
US4829032A
Cited
US4845062A
Cited
US5006955A
Cited
US5006954A
Cited
US4999737A
Cited
US5077247A
Cited
US5290740A
Cited
US5378663A
Cited
US5645753A
Cited
US5635436A
Cited
US5635433A
Cited
US5672378A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-06-15 | 2001-12-15 | 2002-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-15 | 2005-12-15 | 2006-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-15 | 2009-12-15 | 2010-06-16 | $7700.00 | Window Closed / Lapsed |