US4565609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bath and process for plating tin, lead and tin-lead alloys
Assignee: Shipley Co Inc
•
Filing: 1985-04-15
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Granted: 1986-01-21
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Expires: 2005-04-15
Abstract
Abstract This invention relates to the electrodeposition of tin, lead and particularly tin-lead alloys from an electroplating bath comprising a lead and/or tin alkylsulfonate, an alkylsulfonic acid in a sufficient amount to impart a pH below about 3 to the bath, and various additives to improve the brightness of the deposits, the useful current density ranges, and/or the solderability of tin-lead alloy deposits including quaternary nitrogen wetting agents containing a fatty acid radical, alkylene oxides, pyridine compounds, aromatic aldehydes, acetaldehyde and/or a bismuth compound.
Inventors
- 👤 Fred I. Nobel
- 👤 Barnet Ostrow
- 👤 David N. Schram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:40
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/56; C25D3/30; C25D3/32; C25D3/34; C25D3/36; C25D3/60; H; H05; H05K; H05K3/00; H05K3/30; H05K3/32; H05K3/34; H05K3/3465; H05K3/3473
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
72 words
An electrolytic bath for the electrodeposition of tin, lead and tin-lead alloy metals comprising an aqueous solution containing the metal or metals as a soluble alkyl sulfonate salt, a soluble alkylsulfonic acid in a sufficient amount to impart a pH below about 3 to the bath, and a quaternary nitrogen-fatty acid wetting agent in sufficient amount to improve the throwing power of the bath and the surface finish of the electrolytic deposit.
Claim 2
Dependent Claim
72 words
An electrolytic bath for the electrodeposition of tin, lead and tin-lead alloy metals comprising an aqueous solution containing the metal or metals as a soluble alkyl sulfonate salt, a soluble alkylsulfonic acid in a sufficient amount to impart a pH below about 3 to the bath, and a quaternary nitrogen-fatty acid wetting agent in sufficient amount to improve the throwing power of the bath and the surface finish of the electrolytic deposit.
Claim 3
Dependent Claim
20 words
The bath of claim 1 containing an aromatic aldehyde in a sufficient amount to improve the brightness of the deposit.
Claim 4
Dependent Claim
21 words
The bath of claim 2 containing a soluble bismuth compound in a sufficient amount to extend the useful current density range.
Claim 5
Dependent Claim
21 words
The bath of claim 1 containing a soluble bismuth compound in a sufficient amount to extend the useful current density range.
Claim 6
Dependent Claim
19 words
The bath according to claim 4 containing acetaldehyde in a sufficient amount to extend the useful current density range.
Claim 7
Dependent Claim
20 words
The bath of claim 5 containing an aromatic aldehyde in a sufficient amount to improve the brightness of the deposit.
Claim 8
Dependent Claim
18 words
The bath of claim 1 containing acetaldehyde in a sufficient amount to extend the useful current density range.
Claim 9
Dependent Claim
20 words
The bath of claim 7 containing an aromatic aldehyde in a sufficient amount to improve the brightness of the deposit.
Claim 10
Dependent Claim
67 words
An electrolytic bath for the electrodeposition of tin-lead alloys comprising an aqueous solution containing tin and lead as soluble alkyl sulfonate salts, a soluble alkylsulfonic acid salt in a sufficient amount to impart a pH below about 3 to the bath, and a quaternary nitrogen-fatty acid wetting agent in sufficient amount to improve the throwing power of the bath and the surface finish of the electrolytic deposit.
Claim 11
Dependent Claim
67 words
An electrolytic bath for the electrodeposition of tin-lead alloys comprising an aqueous solution containing tin and lead as soluble alkyl sulfonate salts, a soluble alkylsulfonic acid salt in a sufficient amount to impart a pH below about 3 to the bath, and a quaternary nitrogen-fatty acid wetting agent in sufficient amount to improve the throwing power of the bath and the surface finish of the electrolytic deposit.
Claim 12
Dependent Claim
20 words
The bath of claim 9 containing an aromatic aldehyde in a sufficient amount to improve the brightness of the deposit.
Claim 13
Dependent Claim
21 words
The bath of claim 9 containing a soluble bismuth compound in a sufficient amount to extend the useful current density range.
Claim 14
Dependent Claim
18 words
The bath of claim 9 containing acetaldehyde in a sufficient amount to extend the useful current density range.
Claim 15
Dependent Claim
29 words
A method for electroplating tin-lead alloys which comprises immersing a suitable substrate to be electroplated into the bath of claim 9 and electroplating a tin-lead alloy upon the substrate.
Claim 16
Dependent Claim
24 words
The method of claim 13 wherein the bath further comprises an aromatic aldehyde in a sufficient amount to improve the brightness of the deposit.
Claim 17
Dependent Claim
25 words
The method of claim 13 wherein the bath further comprises a soluble bismuth compound in a sufficient amount to extend the useful current density range.
Claim 18
Dependent Claim
22 words
The method of claim 13 wherein the bath further comprises acetaldehyde in a sufficient amount to extend the useful current density range.
Claim 19
Independent Claim
80 words
A method for electroplating tin, lead, or tin-lead alloy metals which comprises immersing a substrate to be plated in a electroplating bath comprising an aqueous solution containing the metal or metals as a soluble alkylsulfonate salt, a soluble alkylsulfonic acid in a sufficient amount to impart a pH below about 3 to the bath, and a quaternary nitrogen-fatty acid wetting agent in sufficient amount to improve the throwing power of the bath and the surface finish of the electrolytic deposit.
Claim 20
Independent Claim
80 words
A method for electroplating tin, lead, or tin-lead alloy metals which comprises immersing a substrate to be plated in a electroplating bath comprising an aqueous solution containing the metal or metals as a soluble alkylsulfonate salt, a soluble alkylsulfonic acid in a sufficient amount to impart a pH below about 3 to the bath, and a quaternary nitrogen-fatty acid wetting agent in sufficient amount to improve the throwing power of the bath and the surface finish of the electrolytic deposit.
Claim 21
Dependent Claim
24 words
The method of claim 17 wherein the bath further comprises an aromatic aldehyde in a sufficient amount to improve the brightness of the deposit.
Claim 22
Dependent Claim
25 words
The method of claim 18 wherein the bath further comprises a soluble bismuth compound in a sufficient amount to extend the useful current density range.
Claim 23
Dependent Claim
25 words
The method of claim 17 wherein the bath further comprises a soluble bismuth compound in a sufficient amount to extend the useful current density range.
Claim 24
Dependent Claim
22 words
The method of claim 20 wherein the bath further comprises acetaldehyde in a sufficient amount to extend the useful current density range.
Claim 25
Dependent Claim
24 words
The method of claim 21 wherein the bath further comprises an aromatic aldehyde in a sufficient amount to improve the brightness of the deposit.
Claim 26
Dependent Claim
22 words
The method of claim 17 wherein the bath further comprises acetaldehyde in a sufficient amount to extend the useful current density range.
Claim 27
Dependent Claim
24 words
The method of claim 23 wherein the bath further comprises an aromatic aldehyde in a sufficient amount to improve the brightness of the deposit.
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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) | 1989-01-20 | 1989-07-22 | 1990-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-20 | 1993-07-22 | 1994-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-20 | 1997-07-22 | 1998-01-21 | $7700.00 | Window Closed / Lapsed |