US3926748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodeposition of gold-antimony alloys and compositions therefor
Assignee: TE Connectivity Corp
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Filing: 1974-06-28
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Granted: 1975-12-16
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Expires: 1994-06-28
Abstract
Abstract A neutral and stable gold and antimony metal plating bath and gold and antimony metal alloys of outstanding properties; an electrolytic bath operated at a pH between 6.8 and 7.3 which is stable under the plating conditions for a period up to a year and longer capable of depositing from the electrolyzed solution a gold and antimony metal alloy at weight percentages heretofore producing poor deposits; codeposition as an alloy of gold and antimony metal which is suitable as a doped chip-attach surface.
Inventors
- 👤 Lewis Brian Lerner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:52
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/56; C25D3/62
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
86 words
AN ELECTROLYTE FOR ELECTRODEPOSITION OF A GOLD ANTIMONY ALLOY FROM AN AQUEOUS SOLUTION AT A PH OF 6.8 TO 7.3 CONSISTING ESSENTIALLY OF (A) DIBASIC POTASSIUM PHOSPHATE FROM 100 TO 200 GRAMS LITER, (B) MONOBASIC POTASSIUM PHOSPHATE, FROM 30 TO 60 GRAMS/LITER, POTASSIUM TARTRATE, FROM 5 TO 50 GRAMS/LITER, GOLD AS KAU2, FROM 8 TO 17 GRAMS LITER, AND ANTIMONY POTASSIUM TARTRATE, FROM 1 TO 1 GRAMS LITER AND WHEREIN A TO B IS 70 TO 75% ON HYDROUS BASIS TO ANHYDROUS BASIS, BY WEIGHT, RESPECTIVELY.
Claim 2
Dependent Claim
86 words
AN ELECTROLYTE FOR ELECTRODEPOSITION OF A GOLD ANTIMONY ALLOY FROM AN AQUEOUS SOLUTION AT A PH OF 6.8 TO 7.3 CONSISTING ESSENTIALLY OF (A) DIBASIC POTASSIUM PHOSPHATE FROM 100 TO 200 GRAMS LITER, (B) MONOBASIC POTASSIUM PHOSPHATE, FROM 30 TO 60 GRAMS/LITER, POTASSIUM TARTRATE, FROM 5 TO 50 GRAMS/LITER, GOLD AS KAU2, FROM 8 TO 17 GRAMS LITER, AND ANTIMONY POTASSIUM TARTRATE, FROM 1 TO 1 GRAMS LITER AND WHEREIN A TO B IS 70 TO 75% ON HYDROUS BASIS TO ANHYDROUS BASIS, BY WEIGHT, RESPECTIVELY.
Claim 3
Independent Claim
101 words
A method for electrodepositing an antimony gold alloy which comprises electrolyzing an aqueous solution by impressing a current between anode and a workpiece as a cathode, said solution consisting essentially of potassium phosphate (dibasic), from 100 to 200 grams/liter, potassium phosphate (monobasic), from 30 to 60 grams/liter, potassium tartrate, from 5 to 50 grams/litEr, gold as KAu2, from 8 to 17 grams/liter, antimony potassium tartrate, from 1. to 1 grams/liter, wherein the specific gravity of said solution at 25*C is 18*Be and the pH at 25*C as determined electrometrically is from 6.8 to 7.3 and depositing said alloy on said workpiece.
Claim 4
Independent Claim
101 words
A method for electrodepositing an antimony gold alloy which comprises electrolyzing an aqueous solution by impressing a current between anode and a workpiece as a cathode, said solution consisting essentially of potassium phosphate (dibasic), from 100 to 200 grams/liter, potassium phosphate (monobasic), from 30 to 60 grams/liter, potassium tartrate, from 5 to 50 grams/litEr, gold as KAu2, from 8 to 17 grams/liter, antimony potassium tartrate, from 1. to 1 grams/liter, wherein the specific gravity of said solution at 25*C is 18*Be and the pH at 25*C as determined electrometrically is from 6.8 to 7.3 and depositing said alloy on said workpiece.
Claim 5
Dependent Claim
22 words
The method as defined in claim 2, wherein the anode is platinum anode and wherein during the deposition, the solution is agitated.
Claim 6
Dependent Claim
56 words
A composition for use to make an electrolyte for the electrodeposition of a gold-antimony alloy consisting essentially of potassium phosphate (dibasic), potassium phosphate (monobasic), potassium gold cyanide, antimony potassium tartrate, and potassium tartrate, wherein the potassium phosphate (dibasic) to potassium phosphate (monobasic) is 70 to 75 percent on hydrous basis to anhydrous basis, by weight, respectively.
Claim 7
Dependent Claim
56 words
A composition for use to make an electrolyte for the electrodeposition of a gold-antimony alloy consisting essentially of potassium phosphate (dibasic), potassium phosphate (monobasic), potassium gold cyanide, antimony potassium tartrate, and potassium tartrate, wherein the potassium phosphate (dibasic) to potassium phosphate (monobasic) is 70 to 75 percent on hydrous basis to anhydrous basis, by weight, respectively.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |