US3928670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective plating on non-metallic surfaces
Assignee: TE Connectivity Corp
•
Filing: 1974-09-23
•
Granted: 1975-12-23
•
Expires: 1994-09-23
Abstract
Abstract An aqueous method for the selective metallization of a nonconductive surface with nickel, copper, cobalt, or gold, a thin film of palladium dichloride is applied to a film after stannous chloride, a chelating agent and a dye operative as a catalyzing promoter active to a light between 4,500 A and 6,000 A or broadly 3,750 to 8,000 A are applied to the surface of a non-conductive material and that thin film is exposed in selected areas to light through a photographic negative to a light of a wave length determined by the dye. The thin film of the palladium salt, catalytic to the deposition of nickel, copper, cobalt, or gold from an electroless bath thereof causes selective deposition when the thus treated non-conductive material is then immersed in an electroless bath to metallize the areas which have been rendered catalytic by the action of dye and chelating agent in combination with the palladium salt. The preferred dye is Erythrosin dye and the chelating agent is orthopenanthroline.
Inventors
- 👤 Charles Roscoe Brummett
- 👤 Ray Ned Shaak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:53
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; C23C18/1605; C23C18/18; C23C18/20; C23C18/28; C23C18/285; C23C18/30; G; G03; G03C; G03C5/00; G03C5/58
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
194 words
A METHOD FOR THE SELECTIVE ELECTROLESS DEPOSITION OF METALS UPON A SUBSTRATE COMPRISING THE STEPS OF: A. APPLYING TO THE SAID SUBSTRATE A THIN FILM OF A COMBINATION OF (1) A DYE, (2) STANNOUS DICHLORIDE AND (3) A CHELATING AGENT, SAID COMBINATION HAVING A LIGHT ABSORBANCE WITH 3,750 A TO 8,000 A WAVELENGTH, SAID DYE BEING SELECTED FROM THE GROUP CONSISTING OF METHYLROSANILINE CHLORIDE, AZURE-A, ROSE BENGAL, MALACHITE GREEN, EOSIN, PROFLAVIN, PROFLAVIN HYDROGEN CHLORIDE, FLUOROSCEIN, FLUOROSCEIN SODIUM; ERYTHROSIN AND MIXTURES THEREOF, SAID CHELATING AGENT BEING SELECTED FROM THE GROUP CONSISTING OF ORTHOPHENATHROLINE AND ETHYLENEDIAMINE TETRACETIC ACID; B. EXPOSING A SELECTED AREA OF THE SAID SUBSTRATE TO WHICH SAID COMBINATION OF (1), (2) AND (3) HAS BEEN APPLIED, TO LIGHT IN SAID WAVELENGYH TO EFFECT DEACTIVATION OF SAID STANNOUS CHLORIDE AND CREATE AN IMAGE CATALYTIC TO ELECTROLESS METAL IN NON-EXPOSED AREAS; C. DEPOSITING PALLADIUM CHLORIDE ON SAID SUBSTRATE TREATED ACCORDING TO (A) AND (B) STEPS; AND D. IMMERSING IN AN ELECTROLESS METAL BATH SAID SUBSTRATE WITH SAID SALT IN THE AREAS RENDERED CATALYTICALLY ACTIVE BY THE ACTIVE RESIDUE OF STANNOUS CHLORIDE, SAID BATH PROVIDING ELECTROLESSLY A DEPOSIT OF SAID METAL ON SAID CATALYTICALLY ACTIVE SITES.
Claim 2
Independent Claim
194 words
A METHOD FOR THE SELECTIVE ELECTROLESS DEPOSITION OF METALS UPON A SUBSTRATE COMPRISING THE STEPS OF: A. APPLYING TO THE SAID SUBSTRATE A THIN FILM OF A COMBINATION OF (1) A DYE, (2) STANNOUS DICHLORIDE AND (3) A CHELATING AGENT, SAID COMBINATION HAVING A LIGHT ABSORBANCE WITH 3,750 A TO 8,000 A WAVELENGTH, SAID DYE BEING SELECTED FROM THE GROUP CONSISTING OF METHYLROSANILINE CHLORIDE, AZURE-A, ROSE BENGAL, MALACHITE GREEN, EOSIN, PROFLAVIN, PROFLAVIN HYDROGEN CHLORIDE, FLUOROSCEIN, FLUOROSCEIN SODIUM; ERYTHROSIN AND MIXTURES THEREOF, SAID CHELATING AGENT BEING SELECTED FROM THE GROUP CONSISTING OF ORTHOPHENATHROLINE AND ETHYLENEDIAMINE TETRACETIC ACID; B. EXPOSING A SELECTED AREA OF THE SAID SUBSTRATE TO WHICH SAID COMBINATION OF (1), (2) AND (3) HAS BEEN APPLIED, TO LIGHT IN SAID WAVELENGYH TO EFFECT DEACTIVATION OF SAID STANNOUS CHLORIDE AND CREATE AN IMAGE CATALYTIC TO ELECTROLESS METAL IN NON-EXPOSED AREAS; C. DEPOSITING PALLADIUM CHLORIDE ON SAID SUBSTRATE TREATED ACCORDING TO (A) AND (B) STEPS; AND D. IMMERSING IN AN ELECTROLESS METAL BATH SAID SUBSTRATE WITH SAID SALT IN THE AREAS RENDERED CATALYTICALLY ACTIVE BY THE ACTIVE RESIDUE OF STANNOUS CHLORIDE, SAID BATH PROVIDING ELECTROLESSLY A DEPOSIT OF SAID METAL ON SAID CATALYTICALLY ACTIVE SITES.
Claim 3
Dependent Claim
13 words
The process as defined in claim 1 wherein said dye is erythrosin dye.
Claim 4
Dependent Claim
13 words
The process as defined in claim 1 wherein said chelating agent is ortho-phenanthroline.
Claim 5
Dependent Claim
14 words
The process as defined in claim 1 wherein said electrolessly deposited metal is copper.
Claim 6
Dependent Claim
15 words
The process as defined in claim 1 and wherein said electrolessly deposited metal is nickel.
Claim 7
Dependent Claim
14 words
The process as defined in claim 1 and wherein said substrate is a polyimide.
Claim 8
Dependent Claim
22 words
The process as defined in claim 1 and wherein the light absorbance of said combination is within 4,500 A to 6,000 A.
References Cited (Backward Citations)
US3562005A
Cited
US3779758A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |