Patent EP0190574A2 successfully refreshed from Google Patents.
EP0190574A2
Expired / Lapsed
EP
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Multilayer thin film electrical devices free of adhesive
Assignee: Eastman Kodak Co
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Filing: 1986-01-15
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Granted: —
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Expires: 2006-01-15
Abstract
Abstract There is disclosed a laminate comprising alternating polymer sheets and metal layers between the polymer sheets, the laminate being substantially free of adhesive. Each polymer sheet of the laminate has a thickness not exceeding about 25 µm, and the resistivity of the metal layer is from 1 to about 4 ohms/square. Such laminates are useful in making capacitors and piezoelectric multimorphs. A method of making such laminates is also disclosed, wherein a plurality of metal-coated polymer sheets are compressed, in the absence of an adhesive, under pressure sufficient to reduce the thickness of each of the polymeric film layers to a value that is no larger than about 25 µm.
Inventors
- 👤 Michael Alan Marcus
- 👤 Edward Dixon Morrison
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 15:20
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/30; H01G4/002; H01G4/018; H01G4/06; H01G4/14; H01G4/18; H01G4/186; H10; H10N; H10N30/00; H10N30/01; H10N30/05; H10N30/09; H10N30/098; H10N30/50; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24612; Y10T428/24777; Y10T428/24793; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/3154; Y10T428/31678; Y10T428/31692
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
78 words
A laminate useful in thin film electrical devices, comprising alternating layers of electrically conductive metal and an orientable polymer film, each layer of metal being integrally bonded to both adjacent layers of film, said laminate a) having a thickness for each polymer film that does not exceed about 25 pm, and a resistivity of each metal layer of from about 1 to about 4 ohms/square, and b) being generally free of adhesive between adjacent layers of polymeric film.
Claim 2
Dependent Claim
78 words
A laminate useful in thin film electrical devices, comprising alternating layers of electrically conductive metal and an orientable polymer film, each layer of metal being integrally bonded to both adjacent layers of film, said laminate a) having a thickness for each polymer film that does not exceed about 25 pm, and a resistivity of each metal layer of from about 1 to about 4 ohms/square, and b) being generally free of adhesive between adjacent layers of polymeric film.
Claim 3
Dependent Claim
33 words
A laminate as defined in claim 1, wherein at least one of such films comprises a polymer of which at least 50 mole % of the recurring units are derived from vinylidene fluoride.
Claim 4
Dependent Claim
25 words
A laminate as defined in claim 1 or 2, wherein said polymer film comprises polyvinylidene fluoride with a crystalline structure that is predominantly beta phase.
Claim 5
Dependent Claim
96 words
A laminate as defined in claim 1 or 2, wherein said metal layers extend across only a fraction of the width of the adjacent polymer film layers, so as to leave exposed a side margin of said dielectric film layers, such side margin being the same side margin for every other one of said polymer film layers, and the opposite side margin for those in between, and further including electrode metal along the side edges of said layers, the electrode metal at each side bonding together every other metal layer that extends to said each side.
Claim 6
Independent Claim
134 words
A method for making a laminate useful in thin film electrical devices, comprising the steps of a) providing multiple layers of an orientable polymer film having thicknesses no greater than about 100 µm; b) applying a dry coating of electrically conductive metal that is generally free of adhesive, on a surface of each of said layers, said metal coatings having a maximum thickness no greater than that which is effective, after the next step in the method, to produce a resistivity of about 1 to 4 ohms/square; and c) compressing and laminating together simultaneously all of said coated polymeric film layers under pressure sufficient to i) reduce the thickness of each of said polymeric film layers to a value that is no larger than about 25 pm, and ii) bond said multiple layers together.
Claim 7
Independent Claim
134 words
A method for making a laminate useful in thin film electrical devices, comprising the steps of a) providing multiple layers of an orientable polymer film having thicknesses no greater than about 100 µm; b) applying a dry coating of electrically conductive metal that is generally free of adhesive, on a surface of each of said layers, said metal coatings having a maximum thickness no greater than that which is effective, after the next step in the method, to produce a resistivity of about 1 to 4 ohms/square; and c) compressing and laminating together simultaneously all of said coated polymeric film layers under pressure sufficient to i) reduce the thickness of each of said polymeric film layers to a value that is no larger than about 25 pm, and ii) bond said multiple layers together.
Claim 8
Dependent Claim
33 words
A method as defined in claim 5, wherein at least one of said films comprises a polymer at least 50 mole % of the recurring units of which are derived from vinylidene fluoride.
Claim 9
Dependent Claim
73 words
A method as defined in claim 5 or 6, wherein said applying step c) results in alternating edges of said film layers at the coated surfaces having metal applied thereto, leaving exposed an opposite edge for each said polymeric film, and further including the step of: d) metallizing the opposite edges of the laminate produced by step c) to electrically connect the metallized coatings on alternate layers of the reduced polymeric film layers.
Claim 10
Dependent Claim
40 words
A method as defined in claim 5, and further including prior to said step c), the step of wetting the surfaces of said metal-coated polymeric film that are exposed to the compressing force of step c), with an aqueous liquid.
References Cited (Backward Citations)
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