US6251507B1
Expired / Lapsed
US
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Flexible aromatic polymide film/metal film composite sheet
Assignee: Ube Corp
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Filing: 1999-09-29
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Granted: 2001-06-26
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Expires: 2019-09-29
Abstract
Abstract A flexible aromatic polyimide film/metal film composite sheet is composed of a multi-layered polyimide film having a highly heat-resistant aromatic polyimide layer to one surface of which is bonded another aromatic polyimide layer (in which the multi-layer polyimide film is prepared by simultaneous casting), and a metal film which is bonded to the latter polyimide layer by heating under pressure and subsequent cooling under pressure using a double belt press.
Inventors
- 👤 Tomohiko Yamamoto
- 👤 Toshinori Hosoma
- 👤 Kazuhiko Yoshioka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:57
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B15/18; B32B15/20; B32B27/00; B32B27/28; B32B27/281; B32B37/00; B32B37/04; C; C08; C08L; C08L79/00; C08L79/04; C08L79/08; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/032; H05K1/0346; B29; B29K; B29K2079/00; B29K2079/08; B32B2307/00; B32B2307/30; B32B2307/306; B32B2309/00; B32B2309/02; B32B2311/00; B32B2379/00; B32B2379/08; B32B2457/00; B32B2457/08; B32B37/10; B32B37/1027; H05K1/0353; H05K1/036; H05K2201/00; H05K2201/01; H05K2201/0137; H05K2201/0154; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24959; Y10T428/24967; Y10T428/24975; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31721
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
97 words
A continuous flexible aromatic polyimide film/metal film composite sheet having a width of 400 mm or more and comprising a multi-layered polyimide film comprising a layer of heat-resistant aromatic polyimide having a glass transition temperature of at least 350° C. to one surface of which is bonded a thermplastic aromatic polyimide layer having a glass transition temperature of 180 to 275° C., said multi-layer polyimide film bing prepared by simultaneous casting, and a metal film which is bonded to the latter polymide layer by heating under pressure and subsequent cooling under pressure using a double belt press.
Claim 2
Dependent Claim
97 words
A continuous flexible aromatic polyimide film/metal film composite sheet having a width of 400 mm or more and comprising a multi-layered polyimide film comprising a layer of heat-resistant aromatic polyimide having a glass transition temperature of at least 350° C. to one surface of which is bonded a thermplastic aromatic polyimide layer having a glass transition temperature of 180 to 275° C., said multi-layer polyimide film bing prepared by simultaneous casting, and a metal film which is bonded to the latter polymide layer by heating under pressure and subsequent cooling under pressure using a double belt press.
Claim 3
Dependent Claim
41 words
The composite sheet of claim 1 , wherein the multi-layered polyimide film further comprises another thermoplastic aromatic polyimide layer having a glass transition temperature of 180 to 275° C. which is bonded to another surface of the heat-resistant aromatic polyimide layer.
Claim 4
Dependent Claim
28 words
The composite sheet of claim 2 , wherein another metal film is bonded to the thermoplastic aromatic polyimide layer by heating under pressure using a double belt press.
Claim 5
Dependent Claim
47 words
The composite sheet of claim 1 , wherein the simultaneous casting is performed by simultaneously casting a solution containing a precursor of the heat-resistant aromatic polyimide in a solvent and a solution containing the thermoplasic aromatic polyimide or its precursor in a solvent on a temporary support.
Claim 6
Dependent Claim
35 words
The composite sheet of claim 1 , wherein the heat-resistant aromatic polyimide layer has a thickness of 5 to 125 μm and the thermoplastic aromatic polyimide layer has a thickness of 2 to 30 μm.
Claim 7
Dependent Claim
27 words
The corrmposite sheet of claim 1 , wherein the metal film is an electrolytic copper film, a rolled copper film, an aluminum film, or a stainless film.
Claim 8
Dependent Claim
19 words
The composite sheet of claim 1 , wherein the metal film has a thickness of 5 to 50 μm.
Claim 9
Dependent Claim
16 words
The composite sheet of claim 1 , which has a width of 500 mm or more.
Claim 10
Dependent Claim
18 words
The composite sheet of claim 1 , which has a 90° peel strength of 0.7 kg/cm or more.
Claim 11
Dependent Claim
67 words
The composite sheet of claim 1 , wherein the thermoplastic aromatic polyimide layer to which the metal film is bonded comprises an aromatic polyimide which is prepared from a combination of 1,3-bis(4-aminophenoxy)benzene and 2,3,3′,4′-biphenyltetracarboxylic dianhydride, a combination of 1,3-bis(4-aminophenoxy)-2,2-dimethylpropane and 4,4′-oxydiphthalic dianhydride, a combination of 4,4′-oxydiphthalic dianhydride, pyrornellitic dianhydride, and 1,3-bis(4-aminophenoxy)benzene, a combination of 1,3-bis(3-aminophenoxy)benzene and 3,3′4,4′-benzophenonetetracarboxylic dianhydride, or a combination of 3,3′-diaminobenzophenone, 1,3-bis(3-aminophenoxy)benzene, and 3,3′,4,4′-henzophenonetetracarboxylic dianhydride.
References Cited (Backward Citations)
US5741598A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 7.5 Years (Year 8) | 2008-06-25 | 2008-12-25 | 2009-06-26 | $3760.00 | Window Closed / Lapsed |
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