US4387131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic dielectrics
Assignee: International Business Machines Corp
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Filing: 1982-04-05
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Granted: 1983-06-07
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Expires: 2002-04-05
Abstract
Abstract Production of a sintered ceramic dielectric formed from a green sheet having a uniform microporous structure providing uniform dielectric properties and compressibility for lamination of stacked green sheets into a unitary laminate which may be provided with an internal pattern of electrical conductors extending therein. The structure is obtained by blending the ceramic particulate in a solution of a binder resin miscible in a solvent mixture which is formed from a volatile solvent for the binder resin and a less volatile solvent in which the resin is at most only slightly soluble.
Inventors
- 👤 Leslie C. Anderson
- 👤 Robert W. Nufer
- 👤 Frank G. Pugliese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:59
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/13; C04B33/1315; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/632; C04B35/634; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/11; H; H01; H01B; H01B3/00; H01B3/002; H01B3/006; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0306; H10; H10W; H10W70/00; H10W70/60; H10W70/67; H10W70/69; H10W70/692; H10W99/00; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24851; Y10T428/24893; Y10T428/24926; Y10T428/249921; Y10T428/249953; Y10T428/24996; Y10T428/249987; Y10T428/24999; Y10T428/25; Y10T428/259
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
37 words
A ceramic green sheet structure comprising at least two laminated green sheets comprised of a uniform dispersion of ceramic particles in a microporous thermoplastic binder, and a conductor pattern extending in said structure between said laminated sheets.
Claim 2
Dependent Claim
37 words
A ceramic green sheet structure comprising at least two laminated green sheets comprised of a uniform dispersion of ceramic particles in a microporous thermoplastic binder, and a conductor pattern extending in said structure between said laminated sheets.
Claim 3
Dependent Claim
10 words
The structure of claim 1 wherein said particulates comprise alumina.
Claim 4
Dependent Claim
21 words
The structure of claim 2 wherein said alumina comprises 8-95 wt.% of the combined weight of said alumina and said binder.
References Cited (Backward Citations)
US4080414A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-06 | 1986-12-06 | 1987-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-06 | 1990-12-06 | 1991-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-06 | 1994-12-06 | 1995-06-07 | $7700.00 | Window Closed / Lapsed |