Patent US4849379A successfully refreshed from Google Patents.
US4849379A
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Dielectric composition
Assignee: EIDP Inc
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Filing: 1988-01-28
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Granted: 1989-07-18
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Expires: 2008-01-28
Abstract
Abstract A composition for making low K dielectric layers which is an admixture of finely divided solids consisting essentially of (a) lead-free amorphous borosilicate glass containing Al 2 O 3 , a mixture of oxides of alkali metals, alkaline earth metals or mixtures thereof containing Li 2 O and (b) an inorganic filler selected from quartz and mixtures of quartz with 0.5-5% wt. inert oxides having a TCE equal to or greater than 7.
Inventors
- 👤 Cornelius J. McCormick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:06
CPC Classifications
C; C03; C03C; C03C8/00; C03C8/14; C03C8/16; H; H10; H10W; H10W74/00; H10W74/40; H10W74/43; C03C14/00; C03C14/004; C03C3/00; C03C3/04; C03C3/076; C03C3/089; C03C3/091; H01; H01B; H01B3/00; H01B3/02; H01B3/08; H01B3/085; H01B3/087; C03C2214/00; C03C2214/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
105 words
A composition for making low K dielectric layers which is an admixture of finely divided solids consisting essentially of: (a) 55-75% wt. lead-free amorphous borosilicate glass in which the weight ratio of B 2 O 3 to SiO 2 is 0.22-0.55 containing 0.5-1.5% wt. Al 2 O 3 , 1.5-4.0% wt. of a mixture of oxides of alkali metals, alkaline earth metals or mixtures thereof, which oxide mixture contains 0.3-1.0% wt. Li 2 O, basis total glass; and (b) 45-25% wt. of a ceramic filler selected from alpha-quartz and mixtures thereof with 0.5-5.0% wt. inert oxides having a TCE equal to or greater than 7.
Claim 2
Dependent Claim
105 words
A composition for making low K dielectric layers which is an admixture of finely divided solids consisting essentially of: (a) 55-75% wt. lead-free amorphous borosilicate glass in which the weight ratio of B 2 O 3 to SiO 2 is 0.22-0.55 containing 0.5-1.5% wt. Al 2 O 3 , 1.5-4.0% wt. of a mixture of oxides of alkali metals, alkaline earth metals or mixtures thereof, which oxide mixture contains 0.3-1.0% wt. Li 2 O, basis total glass; and (b) 45-25% wt. of a ceramic filler selected from alpha-quartz and mixtures thereof with 0.5-5.0% wt. inert oxides having a TCE equal to or greater than 7.
Claim 3
Dependent Claim
21 words
The composition of claim 1 in which the borosilicate glass contains 0.9-3.0% wt. mixed Na 2 O and K 2 O.
Claim 4
Dependent Claim
28 words
The composition of claim 1 in which the borosilicate component of the glass consists essentially of 72% wt. SiO 2 and 28% wt. B 2 O 3 .
Claim 5
Dependent Claim
23 words
The composition of claim 1 in which the ceramic filler is a mixture of alpha-quartz and 0.5-5.0% wt. Al 2 O 3 .
Claim 6
Dependent Claim
24 words
A screen printable thick rilm composition comprising the composition of claim 1 dispersed in an organic medium comprising resin dissolved in in organic solvent.
Claim 7
Dependent Claim
12 words
The composition of claim 5 in which the resin is ethyl cellulose.
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) | 1992-07-17 | 1993-01-16 | 1993-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-17 | 1997-01-16 | 1997-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-17 | 2001-01-16 | 2001-07-18 | $7700.00 | Window Closed / Lapsed |