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US4406701A
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Electroconductive paste
Assignee: Taiyo Yuden Co Ltd
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Filing: 1982-02-16
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Granted: 1983-09-27
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Expires: 2002-02-16
Abstract
Abstract An electroconductive paste consists essentially of 100 parts by weight of zinc in finely divided form, from about 0.01 to 10.00 parts by weight of a glass frit such as, typically, that of PbO-B2O3-SiO2 composition, from about 0.01 to 14.99 parts by weight of an organotitanium compound such as tetrakisstearoxytitanium, and a vehicle such as alpha-terpineol containing ethylcellulose as an organic binder, for pasting the mixture of the zinc powder, glass frit and organotitanium compound. The paste may contain an additive or additives such as the oxides of some metallic elements. By being fired on ceramic bodies at a temperature above the melting point of zinc, the paste forms conductors or electrodes of ceramic capacitors, varistors or the like. The capacitors or varistors having their conductors or electrodes thus prepared from the zinc paste are approximately equivalent in electrical and mechanical properties to those having their conductors or electrodes fabricated from a conventional silver paste.
Inventors
- 👤 Nobutatsu Yamaoka
- 👤 Kazuo Sasazawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:00
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/005; H01G4/008; H01G4/0085; H01B; H01B1/00; H01B1/14; H01B1/16; H01C; H01C17/00; H01C17/28; H01C17/281; H01C17/283; H01C17/286; B; B22; B22F; B22F2998/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
119 words
An electroconductive paste to be baked on ceramic bodies to provide the conductors or electrodes of ceramic capacitors, varistors or the like, comprising 100 parts by weight of zinc powder, from about 0.01 to about 10.00 parts by weight of a glass frit, from about 0.01 to about 14.99 parts by weight of an organotitanium compound, the sum of the glass frit and the organotitanium compound in use being up to about 15 parts by weight, and an organic vehicle for pasting the mixture of the zinc powder and the glass frit and the organotitanium compound, the organic vehicle being driven off upon baking of the pasted mixture such that it does not form part of the completed conductors.
Claim 2
Dependent Claim
119 words
An electroconductive paste to be baked on ceramic bodies to provide the conductors or electrodes of ceramic capacitors, varistors or the like, comprising 100 parts by weight of zinc powder, from about 0.01 to about 10.00 parts by weight of a glass frit, from about 0.01 to about 14.99 parts by weight of an organotitanium compound, the sum of the glass frit and the organotitanium compound in use being up to about 15 parts by weight, and an organic vehicle for pasting the mixture of the zinc powder and the glass frit and the organotitanium compound, the organic vehicle being driven off upon baking of the pasted mixture such that it does not form part of the completed conductors.
Claim 3
Dependent Claim
16 words
An electroconductive paste as claimed in claim 1, wherein the zinc powder is of spherical particles.
Claim 4
Dependent Claim
26 words
An electroconductive paste as claimed in claim 1 or 2, wherein the zinc powder has an average particle size ranging from about 0.1 to 30.0 microns.
Claim 5
Dependent Claim
17 words
An electroconductive paste as claimed in claim 1, wherein the glass frit is of about 325-mesh particles.
Claim 6
Dependent Claim
25 words
An electroconductive paste as claimed in claim 1 or 4, wherein the glass frit has a softening point ranging from about 400° to 800° C.
Claim 7
Dependent Claim
59 words
An electroconductive paste as claimed in claim 1 or 4, wherein the glass frit is selected from the class consisting of a PbO-B 2 O 3 -SiO 2 glass frit, a PbO-B 2 O 3 glass frit, and a ZnO-B 2 O 3 -SiO 2 glass frit, all with a softening point ranging from about 415° to 625° C.
Claim 8
Dependent Claim
88 words
An electroconductive paste as claimed in claim 1, wherein the organotitanium compound is selected from the class consisting of Ti(O-C 17 H 35 ) 4 , Ti(O-C 4 H 9 ) 4 , Ti(n-C 4 H 9 O) 2 (CH 2 C 6 H 5 ) 2 , Ti(O-iC 3 H 7 ) 2 [OC(CH 3 )CHCOCH 3 ] 2 , Ti(O-nC 4 H 9 ) 2 [OC 2 H 4 N(C 2 H 4 OH) 2 ] 2 , and Ti(OH) 2 [OCH(CH 3 )COOH] 2 .
Claim 9
Dependent Claim
39 words
An electroconductive paste as claimed in claim 1, further comprising from about 0.01 to 5.00 parts by weight of an additive selected from the class consisting of Pb, Bi, Pr, Cu, Cd, and the compounds of these metallic elements.
Claim 10
Dependent Claim
13 words
An electroconductive paste as claimed in claim 8, wherein the compounds are oxides.
Claim 11
Dependent Claim
30 words
An electroconductive paste as claimed in claim 9, wherein the oxides include Pb 3 O 4 , Bi 2 O 3 , Pr 6 O 11 , CuO, and CdO.
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) | 1986-09-26 | 1987-03-28 | 1987-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-26 | 1991-03-28 | 1991-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-26 | 1995-03-28 | 1995-09-27 | $7700.00 | Window Closed / Lapsed |