US4417954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolyte for the electrodeposition of aluminum
Assignee: AlumiPlate Inc
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Filing: 1983-01-25
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Granted: 1983-11-29
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Expires: 2003-01-25
Abstract
Abstract An organometallic electrolyte for the electrodeposition of aluminum is described which exhibits high throwing power as well as high conductivity and good solubility and is commercially readily accessible. For this purpose, the invention provides an electrolyte of a formula based upon an organometallic complex of potassium, rubidium or cesium fluoride in combination with a series of organometallic aluminum compounds.
Inventors
- 👤 Siegfried Birkle
- 👤 Klaus Stoger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:43
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/42; C25D3/44
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
84 words
An organometallic electrolyte for the electrodeposition of aluminum, comprising: a metal fluoride composition of the formula MeF.[(m-n)AlEt.sub.3.nAlR.sub.3 ], wherein, Me is potassium rubidium or cesium; R is H or C x H 2x+1 , x being an integer selected from 1 and 3 to 8, m is a number from 1.3 to 2.4 and n is a number from 0.1 to 1.1, m being larger than 2n; and at least two R groups are alkyls selected from said formula C x H 2x+1 .
Claim 2
Dependent Claim
84 words
An organometallic electrolyte for the electrodeposition of aluminum, comprising: a metal fluoride composition of the formula MeF.[(m-n)AlEt.sub.3.nAlR.sub.3 ], wherein, Me is potassium rubidium or cesium; R is H or C x H 2x+1 , x being an integer selected from 1 and 3 to 8, m is a number from 1.3 to 2.4 and n is a number from 0.1 to 1.1, m being larger than 2n; and at least two R groups are alkyls selected from said formula C x H 2x+1 .
Claim 3
Dependent Claim
33 words
An organometallic electrolyte according to claim 1 wherein: x is selected from 1, 3 or 4; m is a number from 1.8 to 2.2; and n is a number from 0.2 to 0.5.
Claim 4
Dependent Claim
43 words
An organometallic electrolyte comprising: a metal fluoride composition having the following formula: KF.[(m'-n')AlEt.sub.3.n'AlR'.sub.3 ], wherein, m' is a number from 1.8 to 2.2; n' is a number from 0.2 to 0.5; K is potassium; Et is ethyl; and R' is methyl or butyl.
Claim 5
Dependent Claim
43 words
An organometallic electrolyte comprising: a metal fluoride composition having the following formula: KF.[(m'-n')AlEt.sub.3.n'AlR'.sub.3 ], wherein, m' is a number from 1.8 to 2.2; n' is a number from 0.2 to 0.5; K is potassium; Et is ethyl; and R' is methyl or butyl.
Claim 6
Dependent Claim
18 words
An organometallic electrolyte according to claim 3 wherein m is 2.0, n is 0.4 and R is i-butyl.
Claim 7
Dependent Claim
49 words
A method for aluminum electroplating in an electroplating cell comprising using as the electrolyte, an organometallic electrolyte according to claim 1 in solution with an aromatic hydrocarbon which is liquid at ambient temperature and wherein the molar ratio of electrolyte to hydrocarbon is from about 1:1 to about 1:10.
Claim 8
Dependent Claim
20 words
A method according to claim 5 wherein the ratio is from about 1:1 to 1:5 and the hydrocarbon is toluene.
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) | 1986-11-28 | 1987-05-30 | 1987-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-28 | 1991-05-30 | 1991-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-28 | 1995-05-30 | 1995-11-29 | $7700.00 | Window Closed / Lapsed |