US3661597A
Expired / Lapsed
US
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Electroless copper plating
Assignee: Shipley Co Inc
•
Filing: 1971-05-20
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Granted: 1972-05-09
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Expires: 1991-05-20
Abstract
Abstract The invention is directed to an electroless copper solution characterized by inclusion of a polyether adduct of an alkine alcohol and an alkylene oxide for improved solution stability and deposit appearance.
Inventors
- 👤 Michael Gulla
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:51
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/31; C23C18/38; C23C18/40; C23C18/405
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
20 words
The solution of claim 1 where the polyether is the reaction product of an alkine alcohol and an alkylene oxide.
Claim 2
Dependent Claim
24 words
The solution of claim 2 where the alkylene oxide is selected from the group of ethylene oxide, propylene oxide, isobutylene oxide and 1,2-epoxy butane.
Claim 3
Dependent Claim
12 words
The solution of claim 2 where the alkylene oxide is ethylene oxide.
Claim 4
Dependent Claim
14 words
The solution of claim 1 where R, R'' and R'''' are individually alkylene radicals.
Claim 5
Dependent Claim
16 words
The solution of claim 1 where R, R'' and/or R'''' are substituted with a polar group.
Claim 6
Dependent Claim
24 words
The solution of claim 6 where the polar group is selected from the group of -NH2, -SO3OH, -COOH, -NO3, -Cl, -Br, -I, and -F.
Claim 7
Dependent Claim
12 words
The solution of claim 1 where n varies between 5 and 50.
Claim 8
Dependent Claim
22 words
The solution of claim 1 containing said polyether in an amount of from 2 to 2,000 parts per million parts of solution.
Claim 9
Dependent Claim
22 words
The Solution of claim 1 containing said polyether in an amount of from 25 to 200 parts per million parts of solution.
Claim 10
Dependent Claim
11 words
The solution of claim 1 where the polyether has the formula
Claim 11
Dependent Claim
11 words
The solution of claim 1 where the polyether has the formula
Claim 12
Dependent Claim
92 words
In an aqueous, alkaline electroless copper plating solution comprising a source of cupric ions, formaldehyde as a reducing agent, a complexing agent to maintain said cupric ions in solution and hydroxide to provide required solution pH, the improvement comprising a stabilizing quantity of a polyether of the formula where R is selected from the group of divalent alkylene, cycloalkylene, alkylene ether and arylene radicals, said radicals having from one-12 carbon atoms. A is an alkylene radical having from two-five carbon atoms and n is a whole integer ranging between 1 and 100.
Claim 13
Dependent Claim
13 words
The composition of claim 13 where R is alkylene and A is ethylene.
Claim 14
Dependent Claim
33 words
The composition of claim 14 wherein A varies between five and 50 and the polyether is contained in solution in an amount of from 25 and 200 parts per million parts of solution.
Claim 15
Independent Claim
108 words
A method for stabilizing an electroless copper plating solution comprising a source of cupric ions, formaldehyde as a reducing agent, a complexing agent to maintain said cupric ions in solution and hydroxide to provide required solution pH, said method comprising addition to said solution of a stabilizing quantity of a polyether adduct corresponding to the formula where each R,R'' and R'''' are individually selected from the group of divalent alkylene, cycloalkylene, alkylene ether and arylene radicals, said radicals having from one to 12 carbon atoms, A is an alkylene radical having from two to five carbon atoms and n is a whole integer ranging between 1 and 100.
Claim 16
Dependent Claim
13 words
The method of claim 16 where the polyether adduct conforms to the formula
Claim 17
Dependent Claim
20 words
The method of claim 17 where the polyether is the reaction product of an alkylene oxide and an alkine alcohol.
Claim 18
Dependent Claim
24 words
The method of claim 18 where the alkylene oxide is selected from the group of ethylene oxide, propylene oxide, isobutylene oxide and 1,2-epoxy butane.
Claim 19
Dependent Claim
12 words
The method of claim 18 where the alkylene oxide is ethylene oxide.
Claim 20
Dependent Claim
11 words
The method of claim 17 where R is an alkylene radical.
Claim 21
Dependent Claim
13 words
The method of claim 17 where R is substituted with a polar group.
Claim 22
Dependent Claim
24 words
The method of claim 22 where the polar group is selected from the group of -NH2, -SO3OH, -COOH, -NO3, -Cl, -Br, -I and -F.
Claim 23
Dependent Claim
21 words
The method of claim 17 where from 2 to 2000 parts of polyether adduct per million parts of solution are added.
Claim 24
Dependent Claim
21 words
The method of claim 17 where from 25 to 2000 parts of polyether adduct per million parts of solution are added.
Claim 25
Dependent Claim
11 words
The method of claim 17 where the polyether has the formula
Claim 26
Dependent Claim
11 words
The method of claim 17 where the polyether has the formula
References Cited (Backward Citations)
US3472664A
Cited
US3457089A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |