US4278514A
Expired / Lapsed
US
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Bright palladium electrodeposition solution
Assignee: Technic Inc
•
Filing: 1980-02-12
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Granted: 1981-07-14
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Expires: 2000-02-12
Abstract
Abstract A palladium electroplating solution contains the palladium in the form of a soluble organopalladium complex of an inorganic palladium salt and an organic polyamine complexing agent. The solution also preferably contains an imide and free complexing agent.
Inventors
- 👤 Ronald J. Morrissey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:23
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/50; C25D3/52
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
93 words
A palladium electroplating solution of pH of about 3-7 containing palladium in the form of a soluble organopalladium complex of an inorganic palladium salt and an organic polyamine complexing agent having 2 to about 8 carbon atoms and 2 to about 5 amino groups complexing agent; said solution being an aqueous solution; and said solution containing about 1-50 grams per liter of an organic imide of the formula ##STR3## in which each R is independently selected from the group consisting of hydrogen, alkyl of 1-5 carbon atoms and alkoxy of 1-5 carbon atoms.
Claim 2
Dependent Claim
93 words
A palladium electroplating solution of pH of about 3-7 containing palladium in the form of a soluble organopalladium complex of an inorganic palladium salt and an organic polyamine complexing agent having 2 to about 8 carbon atoms and 2 to about 5 amino groups complexing agent; said solution being an aqueous solution; and said solution containing about 1-50 grams per liter of an organic imide of the formula ##STR3## in which each R is independently selected from the group consisting of hydrogen, alkyl of 1-5 carbon atoms and alkoxy of 1-5 carbon atoms.
Claim 3
Dependent Claim
26 words
The electroplating solution of claim 1 wherein said organic polyamine is of the formula ##STR4## wherein x is 0-3, y is 0-4 and m is 3-4.
Claim 4
Dependent Claim
30 words
The electroplating solution of claim 2 wherein the complexing agent for palladium is selected from the group consisting of ethylenediamine, 1,2-propylenediamine, 1,3-propanediamine, 1,4-butanediamine, pentamethylenediamine, hexamethylenediamine, cyclohexanediamine, diethylenetriamine, triethylenetetramine, and tetraethylenepentamine.
Claim 5
Dependent Claim
14 words
The electroplating solution of claim 3 wherein said inorganic palladium salt is palladium sulfate.
Claim 6
Dependent Claim
16 words
The electroplating solution of claim 1,2,3 or 4 wherein the organic imide is succinimide or maleimide.
Claim 7
Dependent Claim
18 words
The electroplating solution of claim 1,2,3 or 4 containing about 1-50 grams per liter of free complexing agent.
Claim 8
Dependent Claim
14 words
The electroplating solution of claim 6 wherein the organic imide is succinimide or maleimide.
Claim 9
Dependent Claim
23 words
The electroplating solution of claim 7 wherein said free complexing agent is the same chemical species as the complexing agent in said complex.
References Cited (Backward Citations)
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Cited
US1981715A
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DE2244437A1
Cited
SU452626A1
Cited
SU519497A1
Cited
DE2506467A1
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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) | 1984-07-13 | 1985-01-12 | 1985-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-13 | 1989-01-12 | 1989-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-13 | 1993-01-12 | 1993-07-14 | $7700.00 | Window Closed / Lapsed |