US5792333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of surface-roughening treatment of copper foil
Assignee: Furukawa Electric Co Ltd
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Filing: 1997-06-13
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Granted: 1998-08-11
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Expires: 2017-06-13
Abstract
Abstract A method of surface-roughening a copper foil by subjecting at least one side of the copper foil to electro-plating using an alternating current, wherein a sulfuric acid bath or a sulfuric acid-copper sulfate bath is used as an electrolyte.
Inventors
- 👤 Ryoichi Oguro
- 👤 Tadao Nakaoka
- 👤 Kazuyuki Inoue
- 👤 Kazuhiro Hoshino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:59
CPC Classifications
C; C25; C25F; C25F3/00; C25D; C25D5/00; C25D5/48; C25D3/00; C25D3/02; C25D3/38; C25D5/18; C25D5/60; C25D5/605; C25D5/611; H; H05; H05K; H05K3/00; H05K3/38; H05K3/382; H05K3/384; H05K2201/00; H05K2201/03; H05K2201/0332; H05K2201/0335; H05K2201/0355; H05K2203/00; H05K2203/03; H05K2203/0307; H05K2203/07; H05K2203/0703; H05K2203/0723
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
102 words
A method of surface-roughening a copper foil comprising subjecting at least one side of the copper foil to a repeated sequence of anodic dissolution to etch the copper foil and cathodic electrodeposition to attach copper nodules to the copper foil by electroplating, the electroplating comprising applying an alternating current to the copper foil in an electrolyte consisting essentially of sulfuric acid in a concentration of 30 to 200 g/l, the electroplating being carried out at a temperature of room temperature to 80° C., with a current density of 30 to 80 A/dm 2 and for a time of 15 to 180 seconds.
Claim 2
Independent Claim
102 words
A method of surface-roughening a copper foil comprising subjecting at least one side of the copper foil to a repeated sequence of anodic dissolution to etch the copper foil and cathodic electrodeposition to attach copper nodules to the copper foil by electroplating, the electroplating comprising applying an alternating current to the copper foil in an electrolyte consisting essentially of sulfuric acid in a concentration of 30 to 200 g/l, the electroplating being carried out at a temperature of room temperature to 80° C., with a current density of 30 to 80 A/dm 2 and for a time of 15 to 180 seconds.
Claim 3
Dependent Claim
18 words
The method according to claim 1, wherein the surface-roughening is carried out by an indirect electricity feeding method.
Claim 4
Dependent Claim
31 words
The method according to claim 2, wherein the electrolyte is a bath to which at least one additive selected from the group consisting of inorganic compound additives and organic compound additives.
Claim 5
Dependent Claim
24 words
The method according to claim 3, wherein after the surface-roughening, a stainproofing is carried out with an organic stainproofing agent or a chromate coating.
Claim 6
Dependent Claim
24 words
The method according to claim 3, wherein after the surface-roughening, a smooth plating treatment is carried out by using a sulfuric acid-copper sulfate bath.
Claim 7
Dependent Claim
25 words
The method according to claim 5, wherein after the smooth plating, a stainproofing is carried out with an organic stainproofing agent or a chromate coating.
Claim 8
Dependent Claim
29 words
The method according to claim 6, wherein the copper foil is an electrodeposited copper foil, and until the stainproofing, the electrodeposited copper foil is not wound around a roll.
Claim 9
Dependent Claim
23 words
The method according to claim 2, wherein after the surface-roughening, a smooth plating treatment is carried out with a sulfuric acid-copper sulfate bath.
Claim 10
Dependent Claim
25 words
The method according to claim 8, wherein after the smooth plating, a stainproofing is carried out with an organic stainproofing agent or a chromate coating.
Claim 11
Dependent Claim
29 words
The method according to claim 9, wherein the copper foil is an electrodeposited copper foil, and until the stainproofing, the electrodeposited copper foil is not wound around a roll.
Claim 12
Dependent Claim
24 words
The method according to claim 2, wherein after the surface-roughening, a stainproofing is carried out with an organic stainproofing agent or a chromate coating.
Claim 13
Dependent Claim
33 words
The method according to claim 1, wherein the electrolyte is a bath to which is added at least one additive selected from the group consisting of inorganic compound additives and organic compound additives.
Claim 14
Dependent Claim
24 words
The method according to claim 12, wherein after the surface-roughening, a stainproofing is carried out with an organic stainproofing agent or a chromate coating.
Claim 15
Dependent Claim
23 words
The method according to claim 12, wherein after the surface-roughening, a smooth plating treatment is carried out with a sulfuric acid-copper sulfate bath.
Claim 16
Dependent Claim
25 words
The method according to claim 14, wherein after the smooth plating, a stainproofing is carried out with an organic stainproofing agent or a chromate coating.
Claim 17
Dependent Claim
29 words
The method according to claim 15, wherein the copper foil is an electrodeposited copper foil, and until the stainproofing, the electrodeposited copper foil is not wound around a roll.
Claim 18
Dependent Claim
22 words
The method according to claim 1, wherein after the surface-roughening, a smooth plating treatment is carried out with sulfuric acid-copper sulfate bath.
Claim 19
Dependent Claim
26 words
The method according to claim 17, wherein after the smooth plating treatment, a stainproofing is carried out with an organic stainproofing agent or a chromate coating.
Claim 20
Dependent Claim
29 words
The method according to claim 18, wherein the copper foil is an electrodeposited copper foil, and until the stainproofing, the copper electrodeposited foil is not wound around a roll.
Claim 21
Dependent Claim
24 words
The method according to claim 1, wherein after the surface-roughening, a stainproofing is carried out with an organic stainproofing agent or a chromate coating.
Claim 22
Dependent Claim
24 words
The method according to claim 1, wherein the foil to be surface-roughened is an electrodeposited copper foil having a thickness 9 to 12 μm.
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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) | 2001-08-10 | 2002-02-09 | 2002-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-08-10 | 2006-02-09 | 2006-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-08-10 | 2010-02-09 | 2010-08-11 | $7700.00 | Window Closed / Lapsed |