US5242867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition for making multilayer ceramic substrates and dielectric materials with low firing temperature
Assignee: BLU TECHNOLOGY 2 LLC
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Filing: 1992-03-04
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Granted: 1993-09-07
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Expires: 2012-03-04
Abstract
Abstract A composition for multilayer ceramic substrates and dielectric materials with low firing temperatures is disclosed. The composition, based on the total weight of the composition, includes 40-80% of amorphous borosilicate glass which contains 60-80% by weight of SiO2, 15-30% by weight of B2O3, 0.5-1.5% by weight of Al2O3 and 0.5-3% by weight of alkali oxides; and 20-60% of fillers selected from the groups of alumina, forsterite, quartz, fused SiO2, mullite, cordierite, BN, and AlN.
Inventors
- 👤 Jane-Chyi Lin
- 👤 Chian-Lii Cherng
- 👤 Chien-Min Wang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:14
CPC Classifications
C; C03; C03C; C03C14/00; C03C14/004; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0306; H10; H10W; H10W70/00; H10W70/60; H10W70/67; H10W70/69; H10W70/692; C03C2214/00; C03C2214/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A composition for multi-layer ceramic substrates and dielectric materials with low firing temperature consisting essentially of (1) 45 to 70% by weight of an amorphous borosilicate glass comprising 60-80% by weight SiO 2 , 15-30% by weight of B 2 O 3 , 0.5-0 1.5% by weight of Al 2 O 3 and 0.5-3% by weight of alkali oxides and (2) 30 to 55% by weight of a filler wherein said filler is a mixture of fosterite and alumina by which the coefficient of thermal expansion can be adjusted to match alumina.
Claim 2
Dependent Claim
92 words
A composition for multi-layer ceramic substrates and dielectric materials with low firing temperature consisting essentially of (1) 45 to 70% by weight of an amorphous borosilicate glass comprising 60-80% by weight SiO 2 , 15-30% by weight of B 2 O 3 , 0.5-0 1.5% by weight of Al 2 O 3 and 0.5-3% by weight of alkali oxides and (2) 30 to 55% by weight of a filler wherein said filler is a mixture of fosterite and alumina by which the coefficient of thermal expansion can be adjusted to match alumina.
References Cited (Backward Citations)
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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) | 1996-09-06 | 1997-03-08 | 1997-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-06 | 2001-03-08 | 2001-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-06 | 2005-03-08 | 2005-09-07 | $7700.00 | Window Closed / Lapsed |