US4463060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solderable palladium-nickel coatings and method of making said coatings
Assignee: FCI Americas Technology LLC
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Filing: 1983-11-15
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Granted: 1984-07-31
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Expires: 2003-11-15
Abstract
Abstract A permanently solderable palladium-nickel electroplated coating is formed on electrically conductive surfaces. The coating has a first alloy layer of 46 to 82 atomic percent palladium and 18 to 54 atomic percent nickel. This first layer is covered by a continuous second layer of 96 to 100 atomic percent metallic palladium and 0-4 atomic percent nickel. The second layer has a thickness of up to twenty angstroms. The second layer is formed by dipping the first layer in a solution of sulfuric or hydrochloric acid.
Inventors
- 👤 Stephen W. Updegraff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:51
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/56; C25D5/00; C25D5/48; C25D3/567; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12868; Y10T428/12875; Y10T428/12882; Y10T428/12903; Y10T428/1291; Y10T428/12944
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
71 words
A permanently solderable article comprising a palladium-nickel electroplated coating on an electrically conductive substrate said coating having A first alloy layer of 46 to 82 atomic percent palladium and 18 to 54 atomic percent nickel adhered to the substrate and a second continuous layer covering said first layer of 96 to 100 atomic percent metallic palladium and 0-4 atomic percent nickel, the second layer having a thickness up to twenty angstroms.
Claim 2
Dependent Claim
71 words
A permanently solderable article comprising a palladium-nickel electroplated coating on an electrically conductive substrate said coating having A first alloy layer of 46 to 82 atomic percent palladium and 18 to 54 atomic percent nickel adhered to the substrate and a second continuous layer covering said first layer of 96 to 100 atomic percent metallic palladium and 0-4 atomic percent nickel, the second layer having a thickness up to twenty angstroms.
Claim 3
Dependent Claim
28 words
The article according to claim 1 wherein the second layer has an electrical contact resistance at low loads of less than two mΩ at 10 grams normal force.
Claim 4
Dependent Claim
11 words
The article according to claim 1 wherein the substrate is wire.
Claim 5
Dependent Claim
13 words
The article according to claim 1 wherein the substrate is phosphor bronze alloy.
Claim 6
Dependent Claim
15 words
The article according to claim 1 wherein the substrate is nickel plated copper base alloy.
Claim 7
Dependent Claim
17 words
The article according to claim 1 wherein the first alloy layer is 0.1 to 1.5 micrometers thick.
Claim 8
Dependent Claim
105 words
A process for obtaining a permanently solderable palladium-nickel coating on an electrically conductive substrate comprising immersing the substrate in an electroplating bath consisting of (1) palladium II ammine chloride, (2) nickel ammine sulfate or nickel chloride, (3) a brightener selected from the group consisting of sodium vinyl sulfonate, sodium allyl sulfonate and quaternized pyridine and (4) ammonium sulfate or chloride, at a temperature between 35°-55° C., a pH of 7.5 to 9, a current density of 5 to 25 amp/sq dm, with vigorous agitation to form a plated surface, and thereafter immersing the plated surface in a static aqueous solution of sulfuric or hydrochloric acid.
Claim 9
Dependent Claim
105 words
A process for obtaining a permanently solderable palladium-nickel coating on an electrically conductive substrate comprising immersing the substrate in an electroplating bath consisting of (1) palladium II ammine chloride, (2) nickel ammine sulfate or nickel chloride, (3) a brightener selected from the group consisting of sodium vinyl sulfonate, sodium allyl sulfonate and quaternized pyridine and (4) ammonium sulfate or chloride, at a temperature between 35°-55° C., a pH of 7.5 to 9, a current density of 5 to 25 amp/sq dm, with vigorous agitation to form a plated surface, and thereafter immersing the plated surface in a static aqueous solution of sulfuric or hydrochloric acid.
References Cited (Backward Citations)
DE2747955A1
Cited
US4416741A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-31 | 1988-01-30 | 1988-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-31 | 1992-01-30 | 1992-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-31 | 1996-01-30 | 1996-07-31 | $7700.00 | Window Closed / Lapsed |