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US4138267A
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Compositions for chemical copper plating
Assignee: OKUNO CHEMICAL INDUSTRY COMPANY Ltd
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Filing: 1976-12-28
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Granted: 1979-02-06
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Expires: 1996-12-28
Abstract
Abstract A composition for chemical copper plating having a pH of 12 to 14 and containing a boron hydride compound serving as a reducing agent, a water-soluble copper compound and a copper complexing agent, the composition being characterized in that the copper complexing agent is at least one of hydroxyalkyl-substituted ethylenediamines represented by the formula ##STR1## wherein R 1 , R 2 , R 3 and R 4 are the same or different and are each unsubstituted lower alkyl or hydroxyl- and/or carboxyl-substituted lower alkyl, and at least one of R 1 , R 2 , R 3 and R 4 is hydroxyl-substituted lower alkyl, and hydroxyalkyl-substituted diethylenetriamines represented by the formula ##STR2## wherein R 5 , R 6 , R 7 and R 8 are the same or different and are each unsubstituted lower alkyl or hydroxyl-and/or carboxyl substituted lower alkyl, R 9 is hydrogen or unsubstituted lower alkyl or hydroxyl-and/or carboxyl-substituted lower alkyl, and at least one of R 5 , R 6 , R 7 , R 8 and R 9 is hydroxyl-substituted lower alkyl.
Inventors
- 👤 Yasunori Arisato
- 👤 Hideaki Koriyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:14
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/31; C23C18/38; C23C18/40
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
162 words
A composition for chemical copper plating which consists essentially of 1. a water-soluble copper compound in an amount of about 0.01 to about 0.2 mole per liter of the composition, 2. a boron hydride compound selected from the group consisting of sodium borohydride and potassium borohydride in an amount of about 0.002 to about 0.04 mole per liter of the composition, 3. a copper complexing agent selected from the group consisting of at least one of hydroxyalkyl-substituted ethylenediamines represented by the formula ##STR7## wherein R 1 , R 2 , R 3 and R 4 are the same or different hydroxyl-substituted lower alkyl, and hydroxyalkyl-substituted diethylenetriamines represented by the formula ##STR8## wherein R 5 , R 6 , R 7 and R 8 are the same or different hydroxyl-substituted lower alkyl and R 9 is hydrogen or hydroxyl-substituted lower alkyl in an amount of about 1 to 10 times the amount of the water-soluble copper compound in terms of mole, and optionally
Claim 2
Dependent Claim
162 words
A composition for chemical copper plating which consists essentially of 1. a water-soluble copper compound in an amount of about 0.01 to about 0.2 mole per liter of the composition, 2. a boron hydride compound selected from the group consisting of sodium borohydride and potassium borohydride in an amount of about 0.002 to about 0.04 mole per liter of the composition, 3. a copper complexing agent selected from the group consisting of at least one of hydroxyalkyl-substituted ethylenediamines represented by the formula ##STR7## wherein R 1 , R 2 , R 3 and R 4 are the same or different hydroxyl-substituted lower alkyl, and hydroxyalkyl-substituted diethylenetriamines represented by the formula ##STR8## wherein R 5 , R 6 , R 7 and R 8 are the same or different hydroxyl-substituted lower alkyl and R 9 is hydrogen or hydroxyl-substituted lower alkyl in an amount of about 1 to 10 times the amount of the water-soluble copper compound in terms of mole, and optionally
Claim 3
Dependent Claim
43 words
at least one of stabilizers selected from the group consisting of sodium cyanide, potassium ferrocyanide, 2-mercaptobenzothiazole, 2-mercaptobenzoimidazole, diethylthiourea and phenylthiourea in an amount of about 5 to about 500 mg. per liter of the composition, said composition having pH of 12 to 14.
Claim 4
Dependent Claim
43 words
at least one of stabilizers selected from the group consisting of sodium cyanide, potassium ferrocyanide, 2-mercaptobenzothiazole, 2-mercaptobenzoimidazole, diethylthiourea and phenylthiourea in an amount of about 5 to about 500 mg. per liter of the composition, said composition having pH of 12 to 14.
Claim 5
Dependent Claim
18 words
A composition as defined in claim 1 wherein the hydroxy-alkyl-substituted ethylenediamine represented by the formula (I) is tetra-hydroxyalkylethylenediamine.
Claim 6
Dependent Claim
18 words
A composition as defined in claim 1 wherein R 5 to R 9 are each hydroxyl-substituted lower alkyl.
Claim 7
Dependent Claim
48 words
A composition as defined in claim 1 which contains at least one of hydroxyalkyl-substituted ethylenediamines represented by the formula (I) and hydroxyalkyl-substituted diethylenetriamines represented by the formula (II) in an amount of about 1 to about 3 times the amount of the water-soluble compound in terms of mole.
Claim 8
Dependent Claim
28 words
A composition as defined in claim 1 wherein the hydroxyalkyl-substituted ethylenediamines represented by the formula (I) are at least one compound selected from the group consisting of: ##STR9##
Claim 9
Dependent Claim
28 words
A composition as defined in claim 1 wherein the hydroxyalkyl-substituted diethylenetriamines represented by the formula (II) are at least one compound selected from the group consisting of: ##STR10##
Claim 10
Dependent Claim
28 words
A composition as defined in claim 1 which contains the boron hydride compound in an amount of about 0.009 to about 0.02 mole per liter of the composition.
Claim 11
Dependent Claim
23 words
A composition as defined in claim 1 which contains about 10 to about 250 mg of the stabilizer per liter of the composition.
Claim 12
Dependent Claim
15 words
A composition as defined in claim 1 which has a pH of 12.5 to 13.5.
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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) | 1982-02-05 | 1982-08-07 | 1983-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-05 | 1986-08-07 | 1987-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-05 | 1990-08-07 | 1991-02-06 | $7700.00 | Window Closed / Lapsed |