US4830988A
Expired / Lapsed
US
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Dielectric inks for multilayer copper circuits
Assignee: General Electric Co
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Filing: 1987-03-02
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Granted: 1989-05-16
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Expires: 2007-03-02
Abstract
Abstract An improved dielectric ink for the fabrication of multilayer integrated circuits is disclosed. The subject inks comprise a devitrifying magnesium-barium-aluminum-zirconium-borophosphosilicate glass frit, an organic vehicle and, optionally, a suitable ceramic filler material. Dielectric layers and stand-alone substrates formed from the subject inks are characterized by good mechanical strength, heat resistance and exceptional density. The subject inks are particularly useful in the fabrication of multilayer circuit structures based on copper since their exceptional density renders them resistant to penetration by flux materials from the copper conductor layers.
Inventors
- 👤 Kenneth W. Hang
- 👤 Ashok N. Prabhu
- 👤 Wayne M. Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:06
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/02; H01B3/08; H01B3/088; C; C03; C03C; C03C3/00; C03C3/04; C03C3/062; C03C3/064; H01B3/085; H01B3/087; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0306; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24926
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
144 words
A dielectric ink for multilayer integrated circuit fabrication comprising: (a) from about 60 to about 85 percent by weight of a glass frit comprising, on a weight basis: from about 25 to about 31 percent of magnesium oxide; from about 9 to about 18 percent of barium oxide; from about 10 to about 18 percent of aluminum oxide; from about 10 to about 15 percent of boron trioxide; from about 24 to about 34 percent of silicon dioxide; from about 0.6 to about 0.8 percent of phosphorus pentoxide; from about 2.5 to about 4.5 percent of zirconium silicate; from 0 to about 2 percent of antimony trioxide; and from 0 to about 0.3 percent of cerium oxide; (b) up to about 15 percent by weight of a ceramic filler; and (c) from about 15 to about 30 percent by weight of a organic vehicle.
Claim 2
Dependent Claim
144 words
A dielectric ink for multilayer integrated circuit fabrication comprising: (a) from about 60 to about 85 percent by weight of a glass frit comprising, on a weight basis: from about 25 to about 31 percent of magnesium oxide; from about 9 to about 18 percent of barium oxide; from about 10 to about 18 percent of aluminum oxide; from about 10 to about 15 percent of boron trioxide; from about 24 to about 34 percent of silicon dioxide; from about 0.6 to about 0.8 percent of phosphorus pentoxide; from about 2.5 to about 4.5 percent of zirconium silicate; from 0 to about 2 percent of antimony trioxide; and from 0 to about 0.3 percent of cerium oxide; (b) up to about 15 percent by weight of a ceramic filler; and (c) from about 15 to about 30 percent by weight of a organic vehicle.
Claim 3
Dependent Claim
37 words
A dielectric ink in accordance with claim 1, wherein the glass frit contains fromabout 0.1 to about 1.0 percent by weight of antimony trioxide and from about 0.1 to about 0.3 percent by weight of cerium oxide.
Claim 4
Dependent Claim
88 words
A dielectric ink in accordance with claim 1, wherein the glass frit companies, on a weight basis: from about 26.5 to about 30 percent of magnesium oxide; from about 11 to about 16 percent of barium oxide; from about 11 to about 14 percent of aluminum oxide; from about 11 to about 14 percent of boron trioxide; from about 27 to about 30 percent of silicon dioxide; from about 0.7 to about 0.77 percent of phosphorus pentoxide; and from about 3 to about 4 percent of zirconium silicate.
Claim 5
Dependent Claim
24 words
A dielectric ink in accordance with claim 1, wherein the ink contains from about 7 to about 12 percent by weight of the filler.
Claim 6
Dependent Claim
36 words
A dielectric ink in accordance with claim 4, wherein the filler is selected from the group consisting of alumina, barium dimagnesium disilicate, dimagnesium borate, zirconium silicate, dimagnesia silicate, dimagnesia dialumina pentasilicate, magnesium aluminate and mixtures thereof.
Claim 7
Dependent Claim
14 words
A dielectric ink in accordance with claim 5, wherein the filler material is alumina.
Claim 8
Dependent Claim
22 words
A dielectric ink in accordance with claim 1, wherein the organic vehicle comprises a solution of an organic binder in a solvent.
Claim 9
Dependent Claim
14 words
A dielectric ink in accordance with claim 7, wherein the organic binder is poly(isobutylmethacrylate).
Claim 10
Dependent Claim
14 words
A dielectric ink in accordance with claim 7, wherein the vehicle contains a surfactant.
Claim 11
Dependent Claim
20 words
A dielectric ink in accordance with claim 9, wherein the surfactant is oleylamine or a high molecular weight N-alkyl-1,3-diaminopropane dioleate.
References Cited (Backward Citations)
US3022179A
Cited
US3501322A
Cited
US4256796A
Cited
US4355115A
Cited
US4355114A
Cited
US4369254A
Cited
US4369220A
Cited
US4379195A
Cited
US4385127A
Cited
US4467009A
Cited
JPS59174544A
Cited
US4551357A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-15 | 1992-11-14 | 1993-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-15 | 1996-11-14 | 1997-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-15 | 2000-11-14 | 2001-05-16 | $7700.00 | Window Closed / Lapsed |