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US4767674A
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Metal cored board and method for manufacturing same
Assignee: Dainichi Nippon Cables Ltd
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Filing: 1985-07-26
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Granted: 1988-08-30
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Expires: 2005-07-26
Abstract
Abstract It is disclosed that a metal cored board which comprises an electrically conductive layer whose one surface at least composed of a hardly oxidizable metal, an insulating organic polymer layer baked on the surface of the hardly oxidizable metal, and a metal core adhered on the insulating organic polymer layer, and a method for manufacturing a metal cored board, which comprises a step to coat the surface of a hardly oxidizable metal layer of an electrically conductive metal foil with an insulating varnish, a step to bake a layer of the varnish, and a step to adhere a metal core on the baked varnish layer.
Inventors
- 👤 Hideaki Shirai
- 👤 Kimio Chiba
- 👤 Koji Okawa
- 👤 Hiroshi Ishibashi
- 👤 Akihiro Ishii
- 👤 Hirotaka Itoh
- 👤 Hirokazu Kuzushita
- 👤 Michihiko Yoshioka
- 👤 Michio Hirose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:22
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/05; H05K1/056; H10; H10W; H10W70/00; H10W70/60; H10W70/67; H10W70/68; H10W70/6875; H05K1/09; H05K2203/00; H05K2203/13; H05K2203/1333; H05K2203/135; H05K3/00; H05K3/02; H05K3/022; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12556; Y10T428/12569; Y10T428/12576; Y10T428/12771; Y10T428/12861; Y10T428/12882; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31699
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
48 words
A metal cored board which comprises an electrically conductive layer at least one surface of which is composed of a hardly oxidizable metal, an insulating organic polymer layer baked on the surface of the hardly oxidizable metal, and a metal core adhered on the insulating organic polymer layer.
Claim 2
Dependent Claim
48 words
A metal cored board which comprises an electrically conductive layer at least one surface of which is composed of a hardly oxidizable metal, an insulating organic polymer layer baked on the surface of the hardly oxidizable metal, and a metal core adhered on the insulating organic polymer layer.
Claim 3
Dependent Claim
33 words
A metal cored board of claim 1, wherein the electrically conductive layer is composed of an electrically conductive metal having a volume resistivity at 25° C. of lower than 5×10 -6 ohm. cm.
Claim 4
Dependent Claim
27 words
A metal cored board of claim 1, wherein the hardly oxidizable metal is a member selected from the group consisting of copper, nickel, silver, gold, and tin.
Claim 5
Dependent Claim
31 words
A metal cored board of claim 2, wherein the electrically conductive layer is composed of an oxidizable metal layer having on at least one surface thereof a hardly oxidizable metal layer.
Claim 6
Dependent Claim
184 words
A metal cored board of claims 1 to 4, wherein the insulating organic polymer layer is a polyacryl resin which is formed by coating a polyacryl varnish and baking the coated layer, said polyacryl varnish comprising a copolymer of (a) at least one compound represented by the formula (1), ##STR3## and (b) at least one compound represented by the formula (11), ##STR4## and (c) at least one unsaturated organic acid having from 3 to about 30 carbon atoms and at least one double bond which is reactable with the double bond of the compound of the formula (1) or (11), wherein R 1 represents a hydrogen atom or an alkyl group having 1 to about 30 carbon atoms, R 2 represents a cyano group, an aldehyde group or a carboxyalkyl ester group having 2 to about 30 carbon atoms, and R 3 and R 4 each represents a hydrogen atom, an organic group having 1 to about 30 carbon atoms selected from the group consisting of an alkyl group, an amide group, an N-alkylamide group, an alkylol group, a glycidyl-ethergroup and a glycidylester group.
Claim 7
Independent Claim
54 words
A method for manufacturing a metal cored board, which comprises a step to coat the surface of a hardly oxidizable metal layer of an electrically conductive metal foil with an insulating varnish, a step to bake a layer of the varnish, and a step to adhere a metal core on the baked varnish layer.
Claim 8
Independent Claim
54 words
A method for manufacturing a metal cored board, which comprises a step to coat the surface of a hardly oxidizable metal layer of an electrically conductive metal foil with an insulating varnish, a step to bake a layer of the varnish, and a step to adhere a metal core on the baked varnish layer.
Claim 9
Dependent Claim
13 words
A method of claim 6, wherein the insulating varnish is an electrodeposition varnish.
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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) | 1991-08-30 | 1992-02-29 | 1992-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-30 | 1996-02-29 | 1996-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-30 | 2000-02-29 | 2000-08-30 | $7700.00 | Window Closed / Lapsed |