US4931365A
Expired / Lapsed
US
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Aromatic polyimide film having metallic surface
Assignee: Ube Corp
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Filing: 1988-05-20
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Granted: 1990-06-05
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Expires: 2008-05-20
Abstract
Abstract An aromatic polyimide film having a metallic surface comprises a substrate film of an aromatic polyimide containing essentially no inorganic particle, an aromatic polyimide resin layer containing non-conductive metal oxide particles dispersed therein and a metal layer, superposed in order. A portion of the non-conductive metal oxide particles located in the vicinity of the surface of the aromatic polyimide resin layer is reduced into metal so that the surface of the resin layer is made electroconductive.
Inventors
- 👤 Hiroshi Inoue
- 👤 Tetsuji Hirano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:50
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/38; H05K3/10; H05K3/18; H05K3/188; H05K3/386; H05K3/387; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/032; H05K1/0346; H05K1/0353; H05K1/0373; H05K2201/00; H05K2201/01; H05K2201/0137; H05K2201/0154; H05K2201/02; H05K2201/0203; H05K2201/0206; H05K2201/0236; H05K2203/00; H05K2203/11; H05K2203/1157; H05K2203/12; H05K2203/125; H05K3/105; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31721
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
142 words
An aromatic polyimide film having a metallic surface thereon comprising a substrate film made of an aromatic polyimide containing essentially no inorganic particles, an aromatic polyimide resin layer containing non-conductive metal oxide particles dispersed therein, and a metal layer, superposed in order, wherein said aromatic polyimide resin layer is coated over the substrate film, a portion of said non-conductive metal oxide particles are present on the surface of the aromatic polyimide resin layer on the side in contact with the metal layer in such manner that the top portions of said particles on the surface are exposed and said exposed top portions of the particles are so reduced into metal that the surface of said resin layer is made conductive, and said metal layer is coated over the exposed conductive portions of the particles through an electrolytic process or an electrochemical process.
Claim 2
Dependent Claim
142 words
An aromatic polyimide film having a metallic surface thereon comprising a substrate film made of an aromatic polyimide containing essentially no inorganic particles, an aromatic polyimide resin layer containing non-conductive metal oxide particles dispersed therein, and a metal layer, superposed in order, wherein said aromatic polyimide resin layer is coated over the substrate film, a portion of said non-conductive metal oxide particles are present on the surface of the aromatic polyimide resin layer on the side in contact with the metal layer in such manner that the top portions of said particles on the surface are exposed and said exposed top portions of the particles are so reduced into metal that the surface of said resin layer is made conductive, and said metal layer is coated over the exposed conductive portions of the particles through an electrolytic process or an electrochemical process.
Claim 3
Dependent Claim
35 words
The aromatic polyimide film having a metallic surface, as claimed in claim 1, wherein said surface of the aromatic polyimide resin layer has a surface resistance in the range of 0.01 to 10 3 ohms.
Claim 4
Dependent Claim
34 words
The aromatic polyimide film having a metallic surface as claimed in claim 1, wherein said aromatic polyimide resin layer contains the non-conductive metal oxide particles in an amount of 20 to 80% by weight.
Claim 5
Dependent Claim
45 words
The aromatic polyimide film having a metallic surface as claimed in claim 1, wherein said non-conductive metal oxide particles in the aromatic polyimide resin layer are particles of copper oxide, nickel oxide, cobalt oxide, lead oxide, cadmium oxide, chromium oxide, tin oxide or antimony oxide.
Claim 6
Dependent Claim
24 words
The aromatic polyimide film having a metallic surface as claimed in claim 1, wherein said metal layer is a layer made of metallic copper.
Claim 7
Dependent Claim
36 words
The aromatic polyimide film having a metallic surface as claimed in claim 1, wherein said aromatic polyimide of the substrate film is a polymer produced from an aromatic tetracarboxylic acid component and an aromatic diamine component.
Claim 8
Dependent Claim
35 words
The aromatic polyimide film having a metallic surface, as claimed in claim 6, wherein said surface of the aromatic polyimide resin layer has a surface resistance in the range of 0.01 to 10 3 ohms.
Claim 9
Dependent Claim
34 words
The aromatic polyimide film having a metallic surface as claimed in claim 6, wherein said aromatic polyimide resin layer contains the non-conductive metal oxide particles in an amount of 20 to 80% by weight.
Claim 10
Dependent Claim
45 words
The aromatic polyimide film having a metallic surface as claimed in claim 8, wherein said non-conductive metal oxide particles in the aromatic polyimide resin layer are particles of copper oxide, nickel oxide, cobalt oxide, lead oxide, cadmium oxide, chromium oxide, tin oxide or antimony oxide.
Claim 11
Dependent Claim
24 words
The aromatic polyimide film having a metallic surface as claimed in claim 9, wherein said metal layer is a layer made of metallic copper.
Claim 12
Dependent Claim
55 words
The aromatic polyimide film having a metallic surface as claimed in claim 6, wherein said tetracarboxylic acid is 3,3',4,4'-biphenyltetracarboxylic acid, 2,2',3,3'-biphenyltetracarboxylic acid, 2,3,3',4'-biphenyltetracarboxylic acid, 3,3',4,4'-benzophenonetetracarboxylic acid, bis(3,4-dicarboxyphenyl)-methane, 2,2-bis(3,4-dicarboxyphenyl)propane, bis(3,4-dicarboxyphenyl)thioether, bis(3,4-dicarboxyphenyl)-sulfone, 2,3,6,7-naphthalenetetracarboxylic acid, or pyromellitic acid; and said aromatic diamine component is 4,4'-diaminodiphenyl ether, 4,4'-diaminodiphenylpropane, benzidine, 3,3'-dimethylbenzidine, 4,4'-diaminodiphenyl-sulfide, 4,4'-diaminodiphenylsulfone, methaphenylene-diamine, paraphenylenediamine, 3,3'-diaminodiphenyl-methane, 3,3'-diaminodiphenylpropane, 3,3'-diaminodiphenylsulfide, or 3,3'-diaminodiphenylsulfone.
Claim 13
Dependent Claim
35 words
The aromatic polyimide film having a metallic surface, as claimed in claim 11, wherein said surface of the aromatic polyimide resin layer has a surface resistance in the range of 0.01 to 10 3 ohms.
Claim 14
Dependent Claim
34 words
The aromatic polyimide film having a metallic surface as claimed in claim 12, wherein said aromatic polyimide resin layer contains the non-conductive metal oxide particles in an amount of 20 to 80% by weight.
Claim 15
Dependent Claim
45 words
The aromatic polyimide film having a metallic surface as claimed in claim 13, wherein said non-conductive metal oxide particles in the aromatic polyimide resin layer are particles of copper oxide, nickel oxide, cobalt oxide, lead oxide, cadmium oxide, chromium oxide, tin oxide or antimony oxide.
Claim 16
Dependent Claim
35 words
The aromatic polyimide film having a metallic surface, as claimed in claim 13, wherein said surface of the aromatic polyimide resin layer has a surface resistance in the range of 0.01 to 10 3 ohms.
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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) | 1993-06-04 | 1993-12-04 | 1994-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-04 | 1997-12-04 | 1998-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-04 | 2001-12-04 | 2002-06-05 | $7700.00 | Window Closed / Lapsed |