US5767030A
Expired / Lapsed
US
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High frequency dielectric ceramic composition and fabrication method thereof
Assignee: Korea Institute of Science and Technology
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Filing: 1996-09-05
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Granted: 1998-06-16
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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 16:07
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.
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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) | 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 |