US4021314A
Expired / Lapsed
US
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Method of depositing a metal on a surface
Assignee: AT&T Inc
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Filing: 1976-03-25
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Granted: 1977-05-03
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Expires: 1996-03-25
Abstract
Abstract A method of depositing a metal on a dielectric surface is disclosed. The method comprises treating the surface with a stable hydrosol obtained by mixing and heating together in an acidic aqueous medium (1) a salt of a noble metal with (2) an organic compound containing at least two oxygen atoms selected from (a) an organic carbonate having a structural formula of ##STR1## where R = H, an alkyl radical, (b) ethylene glycol and (c) 1,3 dioxane. The treated surface is then exposed to a suitable electroless metal deposition solution to catalytically deposit an electroless metal deposit thereon.
Inventors
- 👤 Robert Vincent Dafter, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:24
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/18; C23C18/20; C23C18/28; Y; Y10; Y10S; Y10S205/00; Y10S205/924; Y10S205/926
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
109 words
A method of depositing a metal on a dielectric surface which comprises: treating the surface with a stable hydrosol obtained by mixing and heating together in an acidic aqueous medium (1) a salt of a noble metal with (2) an organic compound containing at least two oxygen atoms selected from the group consisting of (a) an organic carbonate having a structural formula of ##STR4## where R is a member selected from the group consisting of an alkyl radical and a hydrogen atom, (b) ethylene glycol, and (c) 1,3 dioxane; and exposing said treated surface to a suitable electroless metal deposition solution to catalytically deposit an electroless metal deposit thereon.
Claim 2
Independent Claim
109 words
A method of depositing a metal on a dielectric surface which comprises: treating the surface with a stable hydrosol obtained by mixing and heating together in an acidic aqueous medium (1) a salt of a noble metal with (2) an organic compound containing at least two oxygen atoms selected from the group consisting of (a) an organic carbonate having a structural formula of ##STR4## where R is a member selected from the group consisting of an alkyl radical and a hydrogen atom, (b) ethylene glycol, and (c) 1,3 dioxane; and exposing said treated surface to a suitable electroless metal deposition solution to catalytically deposit an electroless metal deposit thereon.
Claim 3
Dependent Claim
14 words
The method as defined in claim 1 wherein said organic carbonate comprises ethylene carbonate.
Claim 4
Dependent Claim
14 words
The method as defined in claim 1 wherein said organic carbonate comprises propylene carbonate.
Claim 5
Dependent Claim
20 words
The method as defined in claim 1 which further comprises: electroplating said electroless metal deposit to electrodeposit a metal thereon.
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) | 1980-05-02 | 1980-11-01 | 1981-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-02 | 1984-11-01 | 1985-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-02 | 1988-11-01 | 1989-05-03 | $7700.00 | Window Closed / Lapsed |