US4756064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making capacitor elements
Assignee: Toray Industries Inc
•
Filing: 1987-02-11
•
Granted: 1988-07-12
•
Expires: 2007-02-11
Abstract
Abstract Capacitor elements having an ultra thin dielectric layer are made by the method of cutting a metal-deposited polyethylene terephthalate laminated film into a predetermined width, and then separating a metal-deposited polyethylene terephthalate film from the cut laminated film and successively forming the separated metal-deposited polyethylene terephthalate film into a coil. The metal-deposited polyethylene terephthalate laminated film is composed of an oriented ultra thin polyethylene terephthalate film having a thickness of 0.2 to 2.0 μm, on one surface of which a metal layer is formed by vacuum deposition and on the other surface of which a propylene copolymer support film is bonded with an adhesive force of 0.1 to 2.0 g/cm.
Inventors
- 👤 Toshiya Yoshii
- 👤 Kazuo Okabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:34
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B15/00; B32B15/04; B32B15/08; B32B27/32; B32B27/36; B32B7/00; B32B7/04; B32B7/12; H; H01; H01G; H01G4/00; H01G4/002; H01G4/005; H01G4/015; H01G4/018; H01G4/20; B32B2250/00; B32B2250/02; B32B2250/03; B32B2255/00; B32B2255/20; B32B2255/205; B32B2307/00; B32B2307/40; B32B2307/42; B32B2323/00; B32B2323/10; B32B2457/00; B32B2457/16; Y; Y10; Y10T; Y10T29/00; Y10T29/43; Y10T29/435; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31786; Y10T428/31797
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
104 words
A method for making capacitor elements having an ultra thin dielectric layer which comprises: cutting, in a predetermined width, a metal-deposited laminated film comprising an oriented ultra thin polyethylene terephthalate film having a thickness of 0.2 to 2.0 μm, on one surface of which a metal layer is formed by vacuum deposition and on the other surface of which a propylene copolymer film as a support film is bonded with an adhesive force of 0.1 to 2.0 g/cm, and forming capacitor elements by separating the metal-deposited polyethylene terephthalate film from the cut laminated film and forming the metal-deposited polyethylene terephthalate film into a coil.
Claim 2
Independent Claim
104 words
A method for making capacitor elements having an ultra thin dielectric layer which comprises: cutting, in a predetermined width, a metal-deposited laminated film comprising an oriented ultra thin polyethylene terephthalate film having a thickness of 0.2 to 2.0 μm, on one surface of which a metal layer is formed by vacuum deposition and on the other surface of which a propylene copolymer film as a support film is bonded with an adhesive force of 0.1 to 2.0 g/cm, and forming capacitor elements by separating the metal-deposited polyethylene terephthalate film from the cut laminated film and forming the metal-deposited polyethylene terephthalate film into a coil.
Claim 3
Dependent Claim
20 words
A method according to claim 1, wherein the oriented polyethylene terephthalate film has a thickness of 0.2 to 1.0 μm.
Claim 4
Dependent Claim
15 words
A method according to claim 1, wherein the adhesive force is 0.2 to 0.8 g/cm.
Claim 5
Dependent Claim
18 words
A method according to claim 1, wherein the support film has a thickness of 5 to 30 μm.
Claim 6
Dependent Claim
18 words
A method according to claim 1, wherein the propylene copolymer film has a birefringence of 0 to 0.008.
Claim 7
Dependent Claim
61 words
A method according to claim 1, wherein the propylene copolymer film is made of a copolymer composed of 80% to 97% by mole of units derived from propylene and 3 to 20% by mole of units derived from at least one olefin having 2 to 8 carbon atoms, other than propylene, and having a melting point of 90° to 140° C.
Claim 8
Dependent Claim
38 words
A method according to claim 1, wherein the oriented polyethylene terephthalate film is composed of a polyester having an ethylene terephthalate unit content of at least 90% by mole and a melting point of at least 250° C.
Claim 9
Dependent Claim
19 words
A method according to claim 1, wherein the deposited metal layer has a thickness of 0.03 to 0.3 μm.
Claim 10
Dependent Claim
20 words
A method according to claim 1, wherein said metal-deposited laminated film has a deposited metal/polyethylene terephthalate/propylene copolymer three layer structure.
Claim 11
Dependent Claim
22 words
A method according to claim 1, wherein said metal-deposited laminated film has a deposited metal/polyethylene terephthalate/propylene copolymer/polyethylene terephthalate/deposited metal five layer structure.
Claim 12
Independent Claim
116 words
A method for making capacitor elements having an ultra thin dielectric layer which comprises: cutting, in a predetermined width, a metal-deposited laminated film comprising a deposited metal/polyethylene terephthalate/propylene copolymer/polyethylene terephthalate/deposited metal five-layer structure, each of said polyethylene terephthalate layers being an oriented ultra thin polyethylene terephthalate film having a thickness of 0.2 to 2.0 μm, each of said deposited metal layers being formed by vacuum deposition, and said propylene copolymer layer being bonded on both of its surfaces to said polyethylene terephthalate layers with an adhesive force of 0.1 to 2.0 g/cm, and separating both of the metal-deposited polyethylene terephthalate films from the propylene copolymer layer and forming said metal-deposited polyethylene terephthalate films into a coil.
Claim 13
Independent Claim
116 words
A method for making capacitor elements having an ultra thin dielectric layer which comprises: cutting, in a predetermined width, a metal-deposited laminated film comprising a deposited metal/polyethylene terephthalate/propylene copolymer/polyethylene terephthalate/deposited metal five-layer structure, each of said polyethylene terephthalate layers being an oriented ultra thin polyethylene terephthalate film having a thickness of 0.2 to 2.0 μm, each of said deposited metal layers being formed by vacuum deposition, and said propylene copolymer layer being bonded on both of its surfaces to said polyethylene terephthalate layers with an adhesive force of 0.1 to 2.0 g/cm, and separating both of the metal-deposited polyethylene terephthalate films from the propylene copolymer layer and forming said metal-deposited polyethylene terephthalate films into a coil.
Claim 14
Dependent Claim
105 words
In a method for making a capacitor, the steps which comprise forming a metal-deposited laminated film comprising an oriented ultra thin polyethylene terephthalate film having a thickness of 0.2 to 2.0 μm having on one of its surfaces a metal layer formed by vacuum deposition, and having on its other surface a propylene copolymer film bonded to said other polyethylene terephthalate surface with an adhesive force of 0.1 to 2.0 g/cm. separating said polyethylene terephthalate film with its metal-deposited surface from said propylene copolymer film and continuously rolling it into a capacitor coil having a multiplicity of layers, and applying electrodes to the resulting capacitor.
Claim 15
Dependent Claim
105 words
In a method for making a capacitor, the steps which comprise forming a metal-deposited laminated film comprising an oriented ultra thin polyethylene terephthalate film having a thickness of 0.2 to 2.0 μm having on one of its surfaces a metal layer formed by vacuum deposition, and having on its other surface a propylene copolymer film bonded to said other polyethylene terephthalate surface with an adhesive force of 0.1 to 2.0 g/cm. separating said polyethylene terephthalate film with its metal-deposited surface from said propylene copolymer film and continuously rolling it into a capacitor coil having a multiplicity of layers, and applying electrodes to the resulting capacitor.
References Cited (Backward Citations)
US27823A
Cited
US2689805A
Cited
US2975345A
Cited
US3212163A
Cited
USRE27823E
Cited
US4064030A
Cited
US4007295A
Cited
US4414053A
Cited
US4613560A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-12 | 1992-01-11 | 1992-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-12 | 1996-01-11 | 1996-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-12 | 2000-01-11 | 2000-07-12 | $7700.00 | Window Closed / Lapsed |