US4192764A
Expired / Lapsed
US
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Stabilizing composition for a metal deposition process
Assignee: AT&T Inc
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Filing: 1978-10-16
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Granted: 1980-03-11
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Expires: 1998-10-16
Abstract
Abstract A method for depositing a metal on a surface is disclosed. The method comprises treating the surface with a sensitizing solution comprising at least a reducible salt of a non-noble metal and a radiation-sensitive reducing agent for the salt to form a sensitized surface. The sensitized surface is exposed to a source of light radiation to reduce the metal salt to a reduced metal salt species. Either or both of the preceding sensitizing or radiation exposing steps is restricted to a selected pattern on the surface to form a catalytic real image capable of directly catalyzing the deposition of a metal thereon from an electroless metal deposition solution. The catalytic real image is treated with a stabilizer comprising (a) a reducing agent for the non-noble metal ions of said reducible salt, (b) a complexing agent and (c) an accelerator to at least stabilize the catalytic real image.
Inventors
- 👤 Bruce S. Madsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:17
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/10; H05K3/18; H05K3/181; H05K3/182; H05K3/185; C; C23; C23C; C23C18/00; C23C18/16; C23C18/1601; C23C18/1603; C23C18/1607; C23C18/1608; C23C18/1612; G; G03; G03C; G03C5/00; G03C5/58
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
51 words
A stabilizing composition for a real image comprising a non-noble metal catalytic species, said composition consisting essentially of: (a) a reducing agent for said non-noble metal catalytic species, (b) a complexing agent for said non-noble metal catalytic species, and (c) an accelerator comprising a cyanide complex of a Group VIII metal.
Claim 2
Dependent Claim
51 words
A stabilizing composition for a real image comprising a non-noble metal catalytic species, said composition consisting essentially of: (a) a reducing agent for said non-noble metal catalytic species, (b) a complexing agent for said non-noble metal catalytic species, and (c) an accelerator comprising a cyanide complex of a Group VIII metal.
Claim 3
Dependent Claim
11 words
The stabilizing composition recited in claim 1 including a basic compound.
Claim 4
Dependent Claim
28 words
The stabilizing composition recited in claim 1 wherein said catalytic metal species is selected from Group VIII and Group IB metals of the Periodic Table of the Elements.
Claim 5
Dependent Claim
24 words
The stabilizing composition recited in claim 1 wherein said catalytic metal species is selected from the group consisting of cobalt, iron, nickel and copper.
Claim 6
Dependent Claim
15 words
The stabilizing composition recited in claim 2 wherein said non-noble metal catalytic species comprises copper.
Claim 7
Dependent Claim
24 words
The stabilizing composition recited in claim 1 wherein said reducing agent is selected from the group consisting of formaldehyde, paraformaldehyde and a mixture thereof.
Claim 8
Dependent Claim
24 words
The stabilizing composition recited in claim 5 wherein said reducing agent is selected from the group consisting of formaldehyde, paraformaldehyde and a mixture thereof.
Claim 9
Dependent Claim
26 words
The stabilizing composition recited in claim 7 wherein said reducing agent is present in an amount of from 0.7 to 1.4 weight percent of the composition.
Claim 10
Dependent Claim
29 words
The stabilizing composition recited in claim 5 wherein said complexing agent is selected from the group consisting of ethylenediaminetetraacetic acid, a salt thereof and a mixture of the foregoing.
Claim 11
Dependent Claim
23 words
The stabilizer composition recited in claim 9 wherein said complexing agent is present in a range of from 2.8 to 4.7 weight percent.
Claim 12
Dependent Claim
17 words
The stabilizer composition recited in claim 5 wherein the pH is maintained at from 12.5 to 12.8.
Claim 13
Dependent Claim
15 words
The stabilizer composition recited in claim 1 wherein said accelerator is selected from iron-cyanide complexes.
Claim 14
Dependent Claim
82 words
A stabilizer composition or a real image comprising a copper species and consisting essentially of: (a) a reducing agent for said copper species selected from the group consisting of formaldehyde, paraformaldehyde and mixtures thereof; (b) a complexing agent selected from the group consisting of ehtylenediaminetetraacetic acid, a salt thereof and a mixture of the foregoing; (c) an accelerator comprising an iron-cyano complex; and (d) a basic compound in sufficient quantity to raise the pH of the composition to greater than pH 7.
Claim 15
Dependent Claim
82 words
A stabilizer composition or a real image comprising a copper species and consisting essentially of: (a) a reducing agent for said copper species selected from the group consisting of formaldehyde, paraformaldehyde and mixtures thereof; (b) a complexing agent selected from the group consisting of ehtylenediaminetetraacetic acid, a salt thereof and a mixture of the foregoing; (c) an accelerator comprising an iron-cyano complex; and (d) a basic compound in sufficient quantity to raise the pH of the composition to greater than pH 7.
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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) | 1983-03-11 | 1983-09-10 | 1984-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-11 | 1987-09-10 | 1988-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-11 | 1991-09-10 | 1992-03-11 | $7700.00 | Window Closed / Lapsed |