US4976826A
Expired / Lapsed
US
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Method of making electrodeposited copper foil
Assignee: Furukawa Electric Co Ltd
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Filing: 1990-02-16
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Granted: 1990-12-11
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Expires: 2010-02-16
Abstract
Abstract Disclosed is a method of making electrodeposited copper foil which comprises carrying electrolysis by adding a water-soluble cellulose ether to an electrolytic solution. A profile of the matte side nodules of the electrodeposited copper foil obtained by the method of the present invention can be easily controlled, and the electrodeposited copper foil which is high above IPC specification Class 3 in elongation at room temperature and high temperature can be obtained.
Inventors
- 👤 Toshio Tani
- 👤 Osamu Kamiyama
- 👤 Noborn Matsuki
- 👤 Ryosaku Fukuda
- 👤 Tsukasa Akutsu
- 👤 Hiroshi Nakatsugawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:31
CPC Classifications
C; C25; C25D; C25D1/00; C25D1/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
21 words
A method of making electrodeposited copper foil which comprises electrodepositing copper from an electrolytic solution which contains a water-soluble cellulose ether.
Claim 2
Independent Claim
21 words
A method of making electrodeposited copper foil which comprises electrodepositing copper from an electrolytic solution which contains a water-soluble cellulose ether.
Claim 3
Dependent Claim
39 words
A method according to claim 1, wherein said water-soluble cellulose ether is a compound in which a part or all of three hydroxyl groups of a unit cellulose represented by the following formula: ##STR2## is/are etherified with a substituent(s).
Claim 4
Dependent Claim
43 words
A method according to claim 2, wherein said water-soluble cellulose ether is selected from the group consisting of sodium carboxymethyl cellulose, potassium carboxymethyl cellulose, ammonium carboxymethyl cellulose, hydroxyethyl cellulose, sodium carboxymethylhydroxyethyl cellulose, potassium carboxymethylhydroxyethyl cellulose, ammonium carboxymethylhydroxyethyl cellulose, methyl cellulose and cyanoethyl cellulose.
Claim 5
Dependent Claim
25 words
A method according to claim 2, wherein said water-soluble cellulose ether is in an amount of 0.1 to 30 ppm based on the electrolytic solution.
Claim 6
Dependent Claim
25 words
A method according to claim 4, wherein said water-soluble cellulose ether is in an amount of 1 to 10 ppm based on the electrolytic solution.
Claim 7
Dependent Claim
19 words
A method according to claim 1, wherein said electrolytic solution consists essentially of an acid aqueous copper sulfate solution.
Claim 8
Dependent Claim
19 words
A method according to claim 3, wherein said electrolytic solution consists essentially of an acid aqueous copper sulfate solution.
Claim 9
Dependent Claim
25 words
A method according to claim 7, wherein said water-soluble cellulose ether is in an amount of 1 to 10 ppm based on the electrolytic solution.
Claim 10
Dependent Claim
15 words
A method according to claim 8, wherein said water-soluble cellulose ether is sodium carboxymethyl cellulose.
Claim 11
Dependent Claim
15 words
A method according to claim 8, wherein said water-soluble cellulose ether is sodium hydroxyethyl cellulose.
Claim 12
Dependent Claim
25 words
A method according to claim 7, wherein said water-soluble cellulose ether is in an amount of 0.1 to 30 ppm based on the electrolytic solution.
References Cited (Backward Citations)
US4820388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-10 | 1994-06-11 | 1994-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-10 | 1998-06-11 | 1998-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-10 | 2002-06-11 | 2002-12-11 | $7700.00 | Window Closed / Lapsed |