US5144526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low temperature co-fired ceramic structure containing buried capacitors
Assignee: Raytheon Co
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Filing: 1991-08-05
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Granted: 1992-09-01
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Expires: 2011-08-05
Abstract
Abstract A low temperature co-fired ceramic ("LTCC") structure containing capacitors buried therein. To avoid distortion, cracking or bowing during the co-firing process, high K dielectric material is placed between each electrode of each capacitor and low K dielectric is arranged symmetrically with respect to a plane passing through the approximate center of the high K dielectric material. Single as well as multiple stacked capacitors can be successfully buried, all without appreciable distortion, cracking or bowing.
Inventors
- 👤 Thanh Vu
- 👤 Tsen-Tsou Shih
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:14
CPC Classifications
H; H10; H10W; H10W44/00; H10W44/601; H05; H05K; H05K1/00; H05K1/16; H05K1/162; H05K1/02; H05K1/03; H05K1/0306; H05K1/09; H05K1/092; H05K2201/00; H05K2201/09; H05K2201/09209; H05K2201/0929; H05K2201/09309; H05K3/00; H05K3/46; H05K3/4611; H05K3/4626; H05K3/4629; H05K3/4688
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
62 words
A low temperature co-fired ceramic structure containing a buried capacitor, said capacitor including: a. a first electrode; b. a second electrode; c. high K dielectric material between said first and second electrode; and d. low K dielectric material arranged symmetrically about said first and second electrodes with respect to a plane passing through the approximate center of said high K dielectric material.
Claim 2
Dependent Claim
62 words
A low temperature co-fired ceramic structure containing a buried capacitor, said capacitor including: a. a first electrode; b. a second electrode; c. high K dielectric material between said first and second electrode; and d. low K dielectric material arranged symmetrically about said first and second electrodes with respect to a plane passing through the approximate center of said high K dielectric material.
Claim 3
Dependent Claim
20 words
The structure of claim 1 wherein said high K and low K dielectric materials are low temperature co-fired ceramic tapes.
Claim 4
Dependent Claim
15 words
The structure of claim 1 further including a connecting via to each of said electrodes.
Claim 5
Dependent Claim
136 words
A low temperature co-fired ceramic structure containing a buried capacitor, said capacitor including: a. a first electrode consisting of a plane of screen printed conducting material; b. a via connecting with said first electrode; c. a second electrode consisting of a plane of screen printed conducting material; d. a via connecting with said second electrode; e. a high K dielectric between said first and second electrodes consisting of one or more low temperature co-fired ceramic tapes having a high K: and f. a first and a second low K dielectric, each consisting of one ore more low temperature co-fired ceramic tapes having a low K, said first and second low K dielectrics being arranged symmetrically about said first and second electrodes with respect to a plane passing through the approximate center of said high K dielectric.
Claim 6
Dependent Claim
136 words
A low temperature co-fired ceramic structure containing a buried capacitor, said capacitor including: a. a first electrode consisting of a plane of screen printed conducting material; b. a via connecting with said first electrode; c. a second electrode consisting of a plane of screen printed conducting material; d. a via connecting with said second electrode; e. a high K dielectric between said first and second electrodes consisting of one or more low temperature co-fired ceramic tapes having a high K: and f. a first and a second low K dielectric, each consisting of one ore more low temperature co-fired ceramic tapes having a low K, said first and second low K dielectrics being arranged symmetrically about said first and second electrodes with respect to a plane passing through the approximate center of said high K dielectric.
Claim 7
Dependent Claim
66 words
A low temperature co-fired ceramic structure containing a plurality of buried capacitors, each of said capacitors comprising: a. a first electrode; b. a second electrode; c. high K dielectric material between said first and second electrode; and d. low K dielectric material arranged symmetrically about said first and second electrodes with respect to a plane passing through the approximate center of said high K dielectric material.
Claim 8
Dependent Claim
66 words
A low temperature co-fired ceramic structure containing a plurality of buried capacitors, each of said capacitors comprising: a. a first electrode; b. a second electrode; c. high K dielectric material between said first and second electrode; and d. low K dielectric material arranged symmetrically about said first and second electrodes with respect to a plane passing through the approximate center of said high K dielectric material.
Claim 9
Dependent Claim
59 words
A low temperature co-fired structure containing a plurality of buried capacitors, said structure including a plurality of planar electrodes, each connected too a via and being separated from one another by alternating planar layers of high and low K dielectric material, the layers of said dielectric material which surround all of said electrodes being of low K dielectric material.
Claim 10
Dependent Claim
59 words
A low temperature co-fired structure containing a plurality of buried capacitors, said structure including a plurality of planar electrodes, each connected too a via and being separated from one another by alternating planar layers of high and low K dielectric material, the layers of said dielectric material which surround all of said electrodes being of low K dielectric material.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1995-09-01 | 1996-03-02 | 1996-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-01 | 2000-03-02 | 2000-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-01 | 2004-03-02 | 2004-09-01 | $7700.00 | Window Closed / Lapsed |