US4381945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thick film conductor compositions
Assignee: EIDP Inc
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Filing: 1981-08-03
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Granted: 1983-05-03
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Expires: 2001-08-03
Abstract
Abstract Thick film conductor metallization comprising an admixture of finely divided particles of noble metal or alloy, low-melting, low viscosity glass, a spinel-forming metal oxide and an organo titanate.
Inventors
- 👤 Kumaran M. Nair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:50
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K1/092; C; C03; C03C; C03C10/00; C03C10/0054; C03C3/00; C03C3/04; C03C3/062; C03C3/07; C03C3/072; C03C3/12; C03C3/14; C03C3/142; C03C3/253; C03C8/00; C03C8/02; C03C8/10; C03C8/14; C03C8/18; C22; C22C; C22C32/00; C22C32/0089; H01; H01B; H01B1/00; H01B1/14; H01B1/16; H01G; H01G4/00; H01G4/002; H01G4/005; H01G4/008; H01G4/0085
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
100 words
In a metallization composition for use in the manufacture of printed conductors comprising an admixture of finely divided particles of 30 to 80% by weight noble metal or alloy thereof, 1 to 20% by weight low-melting, low viscosity glass frit and 0.1 to 10% by weight inorganic metal oxide capable of reacting with Al 2 O 3 to form a spinel structure; the improvement comprising a hydrolyzable organotitanate alcoholate which is a source of positive titanium ions, the above-indicated functionality of the components being obtainable by firing the admixture to effect liquid phase sintering of the glass and noble metal.
Claim 2
Dependent Claim
100 words
In a metallization composition for use in the manufacture of printed conductors comprising an admixture of finely divided particles of 30 to 80% by weight noble metal or alloy thereof, 1 to 20% by weight low-melting, low viscosity glass frit and 0.1 to 10% by weight inorganic metal oxide capable of reacting with Al 2 O 3 to form a spinel structure; the improvement comprising a hydrolyzable organotitanate alcoholate which is a source of positive titanium ions, the above-indicated functionality of the components being obtainable by firing the admixture to effect liquid phase sintering of the glass and noble metal.
Claim 3
Dependent Claim
28 words
The metallization of claim 1 in which the noble metal component is an admixture of palladium and silver particles in a weight ratio of 0.06 to 1.5 Pd/Ag.
Claim 4
Dependent Claim
13 words
The metallization of claim 2 which contains in addition 0.1-5% by weight platinum.
Claim 5
Dependent Claim
26 words
The metallization of claim 1 in which the glass is a bismuth-free lead containing 50-80% wt. Pb 3 O 4 and 10-30% wt. GeO 2 .
Claim 6
Dependent Claim
33 words
The metallization of claim 1 in which the spinel-forming component is an oxide or oxide precursor of a divalent metal selected from the group consisting of Zn, Mg, Co, Ni, Fe and Mn.
Claim 7
Dependent Claim
73 words
The metallization of claim 1 in which the organotitanate is an hydrolyzable metal alcoholate of titanium corresponding to the formula (AO) 4x-2y TiO y , in which A is C 1-8 alkyl or a mixture of C 1-8 alkyl and C 1-8 acyl, O is an oxygen atom covalently bonded to two titanium atoms, x is an integer of 1 to 12 and y is O or an interger from 1 to 3x/2.
Claim 8
Dependent Claim
13 words
The metallization of claim 5 in which the organotitanate is titanium acetyl acetonate.
Claim 9
Dependent Claim
14 words
The metallization of claim 5 in which the organotitanate is tetraoctylene glycol titanium chelate.
Claim 10
Dependent Claim
19 words
A screen-printable paste comprising a dispersion of the metallization of any of claims 1 through 7 in organic medium.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-02 | 1986-11-01 | 1987-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-02 | 1990-11-01 | 1991-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-02 | 1994-11-01 | 1995-05-03 | $7700.00 | Window Closed / Lapsed |