US3873360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of depositing a metal on a surface of a substrate
Assignee: AT&T Inc
•
Filing: 1973-08-16
•
Granted: 1975-03-25
•
Expires: 1993-08-16
Abstract
Abstract A method of depositing a metal on a surface of a substrate is disclosed. A suitable colloidal sensitizing solution, comprising insoluble hydrous oxide particles, selected from among solutions revealed in application Ser. No. 8,022, filed Feb. 2, 1970, is applied to a surface of a substrate. The sensitized substrate surface is then treated with a suitable redox agent to delineate a pattern capable of reducing an activating metal ion to an activating metal. Alternatively, a positive colloidal sensitizing solution, i.e., a solution comprising ions capable of reducing an activating metal ion to an activating metal is applied to the surface and the sensitized surface is then treated with an activating metal ion containing solution to deposit an activating metal pattern thereon. Alternatively, a colloidal activating metal solution is applied to the surface and the surface is then treated with a solution comprising an ion capable of reducing an activating metal ion to deposit an activating metal pattern thereon.
Inventors
- 👤 David Jacob Lando
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:00
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/18; C23C18/20; C23C18/28; C23C18/30; C23C18/1601; C23C18/1603; C23C18/1607; C23C18/1608; H; H05; H05K; H05K3/00; H05K3/10; H05K3/18; H05K3/181; H05K3/182
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
103 words
A method of depositing a metal pattern on a surface of a substrate, which comprises: a. coating the surface with a colloidal wetting sol comprising insoluble hydrous oxide particles of an element selected from the group consisting of Ti, V, Cr, Fe, Hg, Sn, Pb and Bi; b. impressing said coated surface with a suitable redox agent to describe a pattern, corresponding to the metal pattern, capable of reducing an activating metal ion to an activating metal; and c. treating said described pattern with a solution comprising an activating metal ion to reduce an activating metal and deposit said reduced activating metal thereon.
Claim 2
Independent Claim
103 words
A method of depositing a metal pattern on a surface of a substrate, which comprises: a. coating the surface with a colloidal wetting sol comprising insoluble hydrous oxide particles of an element selected from the group consisting of Ti, V, Cr, Fe, Hg, Sn, Pb and Bi; b. impressing said coated surface with a suitable redox agent to describe a pattern, corresponding to the metal pattern, capable of reducing an activating metal ion to an activating metal; and c. treating said described pattern with a solution comprising an activating metal ion to reduce an activating metal and deposit said reduced activating metal thereon.
Claim 3
Dependent Claim
33 words
The method as defined in claim 1 which further comprises immersing said activating metal-deposited pattern in a suitable electroless bath, catalyzed by said deposited activating metal, to deposit an electroless metal deposit therEon.
Claim 4
Independent Claim
175 words
A METHOD OF DEPOSITING A METAL PATTERN ON A SURFACE OF A SUBSTRATE, WHICH COMPRISES: A. COATING THE SURFACE WITH A COLLOIDAL WETTING SOL SELECTED FROM THE GROUP OF WETTING SOLS CONSISTING OF (1) A POSITIVE SENSITIZER COMPRISING INSOLUBLE HYDROUS OXIDE PARTICLES OF AN ELEMENT IN A LOW OXIDATION STATE SELECTED FROM THE GROUP CONSISTING OF TI+3, V 4, CR+3, FE+2, SN+2, PB+2 AND BI+3 AND (2) A NEGATIVE SENSITIZER COMPRISING INSOLUBLE HYDROUS OXIDE PARTICLES OF AN ELEMENT IN A HIGH OXIDATION STATE SELECTED FROM THE GROUP CONSISTING OF FE+3 AND HG+2; B. IMPRESSING SAID COATED SURFACE WITH A SUITABLE REDOX AGENT, SELECTED FROM (1) AN OXIDIZING AGENT WHEN SAID WETTING SO COMPRISES A POSITIVE SENSITIZER AND (2) A REDUCING AGENT WHEN SAID WETTING SOL COMPRISES A NEGATIVE SENSITIZER, TO DESCRIBE A PATTERN CORRESPONDING TO THE METAL PATTERN CAPABLE OF REDUCING AN ACTIVATING METAL ION TO AN CTIVATING METAL; AND C. TREATING SAID DESCRIBED PATTERN WITH A SOLUTION COMPRISING AN ACTIVATING METAL ION TO REDUCE AN ACTIVATING METAL AND DEPOSIT SAID REDUCED ACTIVATING METAL THEREON.
Claim 5
Independent Claim
175 words
A METHOD OF DEPOSITING A METAL PATTERN ON A SURFACE OF A SUBSTRATE, WHICH COMPRISES: A. COATING THE SURFACE WITH A COLLOIDAL WETTING SOL SELECTED FROM THE GROUP OF WETTING SOLS CONSISTING OF (1) A POSITIVE SENSITIZER COMPRISING INSOLUBLE HYDROUS OXIDE PARTICLES OF AN ELEMENT IN A LOW OXIDATION STATE SELECTED FROM THE GROUP CONSISTING OF TI+3, V 4, CR+3, FE+2, SN+2, PB+2 AND BI+3 AND (2) A NEGATIVE SENSITIZER COMPRISING INSOLUBLE HYDROUS OXIDE PARTICLES OF AN ELEMENT IN A HIGH OXIDATION STATE SELECTED FROM THE GROUP CONSISTING OF FE+3 AND HG+2; B. IMPRESSING SAID COATED SURFACE WITH A SUITABLE REDOX AGENT, SELECTED FROM (1) AN OXIDIZING AGENT WHEN SAID WETTING SO COMPRISES A POSITIVE SENSITIZER AND (2) A REDUCING AGENT WHEN SAID WETTING SOL COMPRISES A NEGATIVE SENSITIZER, TO DESCRIBE A PATTERN CORRESPONDING TO THE METAL PATTERN CAPABLE OF REDUCING AN ACTIVATING METAL ION TO AN CTIVATING METAL; AND C. TREATING SAID DESCRIBED PATTERN WITH A SOLUTION COMPRISING AN ACTIVATING METAL ION TO REDUCE AN ACTIVATING METAL AND DEPOSIT SAID REDUCED ACTIVATING METAL THEREON.
Claim 6
Independent Claim
35 words
THE METHOD AS DEFINED IN CLAIMED 3 WHEREIN: SAID OXIDIZING AGENT IS ONE SELECTED FOM A PERMAGANATE SALT AND A DICHROMATE SALT; AND SAID REDUCING AGENT IS ONE SELECTED FROM FORMALDEHYDE AND A STANNOUS SALT.
Claim 7
Dependent Claim
27 words
THE METHOD AS DEFINED IN CLAIM 3 WHICH FURTHER COMPRISES TREATING SAID ACTIVATING METAL-DEPOSITED PATTERN WITH AN ELECTROLESS METAL PLATING SOLUTION TO DEPOSIT AN ELECTROLESS METAL THEREON.
References Cited (Backward Citations)
US3437507A
Cited
US3635758A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |