EP0250195A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Double matte finish copper foil
Assignee: Gould Inc
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Filing: 1987-06-15
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Granted: —
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Expires: 2007-06-15
Abstract
Abstract The present invention provides a novel copper foil wherein both surfaces have a matte finish. The double matte foil of the present invention is produced by depositing a first layer of copper foil, of a predetermined thickness, using conventional electrodeposition techniques; removing the foil from the plating drum, and then depositng a second layer of copper foil onto the smooth surface of the first copper foil layer, thereby producing a composite foil having two matte finish sides.
Inventors
- 👤 Peter Peckham
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 07:13
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/38; H05K3/382; H05K3/384; C; C25; C25D; C25D1/00; C25D1/04; C25D5/00; C25D5/60; C25D5/605; C25D5/627; H05K2201/00; H05K2201/03; H05K2201/0332; H05K2201/0335; H05K2201/0355; H05K2203/00; H05K2203/03; H05K2203/0307; H05K2203/07; H05K2203/0703; H05K2203/0723; H05K3/46; H05K3/4611
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
16 words
A copper foil produced by electrodeposition, having opposed first and second surfaces of a matte finish.
Claim 2
Dependent Claim
16 words
A copper foil produced by electrodeposition, having opposed first and second surfaces of a matte finish.
Claim 3
Dependent Claim
65 words
A copper foil comprising a composite of a first layer of electrodeposited copper having opposed first and second surfaces, said first surface having a matte finish, and a second layer of copper electrodeposited on to the second surface of said first layer, said second copper layer having a matte finish on its exposed surface thereby providing a copper foil having two opposed matte finish surfaces.
Claim 4
Dependent Claim
65 words
A copper foil comprising a composite of a first layer of electrodeposited copper having opposed first and second surfaces, said first surface having a matte finish, and a second layer of copper electrodeposited on to the second surface of said first layer, said second copper layer having a matte finish on its exposed surface thereby providing a copper foil having two opposed matte finish surfaces.
Claim 5
Dependent Claim
20 words
A copper foil according to claim 2, wherein said composite foil has a thickness of less than about 350 microns.
Claim 6
Dependent Claim
22 words
A copper foil according to claim 2, wherein said composite foil has a thickness of from about 5 to about 70 microns.
Claim 7
Dependent Claim
26 words
A copper foil according to claim 3 wherein said first layer comprises from about 1 to about 99% of the average overall thickness of the composite.
Claim 8
Dependent Claim
26 words
A copper foil according to claim 4, wherein said first layer comprises from about 1 to about 99% of the average overall thickness of the composite.
Claim 9
Dependent Claim
26 words
A copper foil according to claim 3, wherein said first layer comprises from about 25 to about 75% of the average overall thickness of the composite.
Claim 10
Dependent Claim
26 words
A copper foil according to claim 4, wherein said first layer comprises from about 25 to about 75% of the average overall thickness of the composite.
Claim 11
Dependent Claim
29 words
A copper foil according to claim 2, wherein said first layer is electrodeposited in a first electrodeposition bath, and said second layer is electrodeposited in a second electrodeposition bath.
Claim 12
Dependent Claim
23 words
A copper foil according to calim 4, wherein said matte finish has an average roughness of from about 2 to about 20 micrometers.
Claim 13
Dependent Claim
23 words
A copper foil according to calim 4, wherein said matte finish has an average roughness of from about 2 to about 20 micrometers.
Claim 14
Dependent Claim
23 words
A copper foil according to claim 8, wherein said matte finish has an average roughness of from about 2 to about 20 micrometers.
Claim 15
Dependent Claim
23 words
A copper foil according to claim 4, wherein said matte finish has an average roughness of from about 3 to about 15 micrometers.
Claim 16
Dependent Claim
23 words
A copper foil according to claim 8, wherein said matte finish has an average roughness of from about 3 to about 15 micrometers.
Claim 17
Independent Claim
71 words
A method of producing a copper foil having two matte surfaces, the steps which comprise depositing a first layer of copper foil, of a predetermined thickness having one matte surface and one smooth surface; removing the foil from the plating drum, and then depositing a second layer of copper foil on to the smooth surface of the first copper foil layer, thereby producing a composite foil having two matte finish surfaces.
Claim 18
Independent Claim
71 words
A method of producing a copper foil having two matte surfaces, the steps which comprise depositing a first layer of copper foil, of a predetermined thickness having one matte surface and one smooth surface; removing the foil from the plating drum, and then depositing a second layer of copper foil on to the smooth surface of the first copper foil layer, thereby producing a composite foil having two matte finish surfaces.
Claim 19
Dependent Claim
72 words
The process according to claim 14, wherein said first layer of copper foil is fed to a second cathode plating drum, where said matte surface of said first layer is caused to come into contact with said plating drum, and said plating drum is caused to rotate past at least one anode, whereby a second layer of copper is electrodeposited on to the smooth surface of the first layer of copper foil.
Claim 20
Dependent Claim
21 words
The process according to claim 15, wherein said first layer of copper foil is continuously fed to said second plating drum.
Claim 21
Dependent Claim
25 words
The process according to claim 15,wherein said first plating drum and said second plating drum are within a common plating tank containing a single electrolyte.
Claim 22
Dependent Claim
27 words
The process according to claim 15, wherein said first plating drum and said second plating drum are located in separate plating tanks, each containing a separate electrolyte.
Claim 23
Dependent Claim
27 words
The process according to claim 16, wherein said first plating drum and said second plating drum are located in separate plating tanks, each containing a separate electrolyte.
Claim 24
Dependent Claim
19 words
The process of claim 19, wherein the electrolytes in the two separate plating baths have different plating bath compositons.
References Cited (Backward Citations)
No citation records indexed.
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