Patent US4499145A successfully refreshed from Google Patents.
US4499145A
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Metal-clad laminate and process for producing the same
Assignee: Sumitomo Bakelite Co Ltd
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Filing: 1983-03-29
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Granted: 1985-02-12
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Expires: 2003-03-29
Abstract
Abstract A metal-clad laminate comprising a base plate composed of a plurality of electrically insulating material layers and a metal foil or foils laminated on one side or both sides of the base plate, characterized in that to at least the metal foil or foils is laminated an electrically insulating material layer composed of a silane-modified polyethylene resin sheet, that to the silane-modified polyethylene resin is laminated an electrically insulating material layer made of a paper or cloth containing an epoxy resin and/or a silanol condensation catalyst, and that the layer made of a paper or cloth contains 5 to 35% by weight of an epoxy resin and/or that to the layer made of a paper or cloth is laminated an electrically insulating material layer other than the above-mentioned two layers. Said metal-clad laminate has excellent characteristics such as low, ε, low tan δ and excellent moisture-resistant insulating property.
Inventors
- 👤 Tomomi Yanagida
- 👤 Mitunori Ajiki
- 👤 Shigeru Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:28
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B15/085; B32B27/00; B32B27/06; B32B27/10; B32B27/12; B32B27/28; B32B27/285; B32B27/286; B32B27/32; B32B5/00; B32B5/02; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/0353; H05K1/036; B32B2305/00; B32B2305/10; B32B2305/18; B32B2307/00; B32B2307/20; B32B2307/206; B32B2311/00; B32B2317/00; B32B2317/12; B32B2323/00; B32B2323/04; B32B2371/00; B32B2457/00; H05K2201/00; H05K2201/01; H05K2201/0104; H05K2201/0129; H05K2201/0137; H05K2201/0158; H05K2201/0162; H05K2201/02; H05K2201/0275; H05K2201/0284; H05K2201/0293; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10S428/91; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31529; Y10T428/31533; Y10T428/31652; Y10T428/31663; Y10T428/31678; Y10T428/31703; Y10T428/31721; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899; Y10T428/31902; Y10T428/31931; Y10T428/31942; Y10T428/31949; Y10T428/31964; Y10T428/31967
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
88 words
A metal-clad laminate comprising: a base plate; and a layer of metal foil on at least one side of said base plate; said base plate including, in order, a first electrically insulating material layer composed of a cross-linked silane-modified polyethylene resin laminated to a layer of said metal foil, and a second electrically insulating material layer made of paper or cloth containing an epoxy resin, a silanol condensation catalyst or a mixture of said epoxy resin and said silanol condensation catalyst laminated to said first electrically insulating layer.
Claim 2
Dependent Claim
88 words
A metal-clad laminate comprising: a base plate; and a layer of metal foil on at least one side of said base plate; said base plate including, in order, a first electrically insulating material layer composed of a cross-linked silane-modified polyethylene resin laminated to a layer of said metal foil, and a second electrically insulating material layer made of paper or cloth containing an epoxy resin, a silanol condensation catalyst or a mixture of said epoxy resin and said silanol condensation catalyst laminated to said first electrically insulating layer.
Claim 3
Dependent Claim
18 words
A metal-clad laminate according to claim 1, wherein the paper or cloth layer contains a silanol condensation catalyst.
Claim 4
Dependent Claim
17 words
A metal-clad laminate according to claim 2, wherein the silanol condensation catalyst is an organic tin compound.
Claim 5
Dependent Claim
30 words
A metal-clad laminate according to claim 3, wherein the silanol condensation catalyst is at least one member selected from dioctyltin malate, monobutyltin oxide, dibutyltin dilaurate, dibutyltin chloride and dibutyltin diacetate.
Claim 6
Dependent Claim
77 words
A metal-clad laminate according to claim 2, wherein the amount of the silanol condensation catalyst is 3 to 10% by weight based on the weight of the epoxy resin when the epoxy resin content of the paper or cloth layer is 15% by weight of more, and it is 0.5 to 2% by weight based on the weight of the paper or cloth in the layer when the epoxy resin content is less than 15% by weight.
Claim 7
Dependent Claim
17 words
A metal-clad laminate according to claim 1, wherein the paper or cloth layer contains an epoxy resin.
Claim 8
Dependent Claim
43 words
A metal-clad laminate according to claim 6, wherein the amount of the epoxy resin contained in the paper or cloth layer is 5 to 35% by weight based on the weight of the paper or cloth plus any other constituents of the layer.
Claim 9
Dependent Claim
43 words
A metal-clad laminate according to claim 6, wherein the amount of the epoxy resin contained in the paper or cloth layer is 10 to 30% by weight based on the weight of the paper or cloth plus any other constituents of the layer.
Claim 10
Dependent Claim
39 words
A metal-clad laminate according to claim 6, further comprising a third electrically insulating layer laminated to the paper or cloth, said third electrically insulating layer comprising a thermoplastic resin having a heat deformation temperature of 130° C. or higher.
Claim 11
Dependent Claim
33 words
A metal-clad laminate according to claim 9, wherein the thermoplastic resin of said third electrically insulating layer is a polyethersulfone, a polysulfone, a polyphenylene sulfide, a polyetheretherketone, a polyphenylene oxide or a polyetherimide.
Claim 12
Dependent Claim
41 words
A metal-clad laminate according to claim 1, comprising layers laminated in the order of the metal foil, the cross-linked silane-modified polyethylene resin layer, the paper or cloth, a third cross-linked silane-modified polyethylene resin layer and a second layer of metal foil.
Claim 13
Dependent Claim
38 words
A metal-clad laminate according to claim 1, which has a metal foil on only one surface laminated to the base plate and has an electrically insulating layer made of a cross-linked silane-modified polyethylene resin on the other surface.
Claim 14
Dependent Claim
59 words
A process for producing a metal-clad laminate of claim 1, characterized by laminating a metal oil and at least the following electrically insulating materials and integrally forming them into one body by heating and pressing: (a) a crosslinkable, silane-modified polyethylene sheet, and (b) a paper or cloth containing an epoxy resin, a silanol condensation catalyst or a mixture thereof.
Claim 15
Dependent Claim
41 words
A process according to claim 13 , wherein the paper or cloth contains an epoxy resin and said epoxy resin comprises 10 to 40% by weight of a novolak type epoxy resin based on the total weight of the epoxy resin.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-12 | 1988-08-13 | 1989-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-12 | 1992-08-13 | 1993-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-12 | 1996-08-13 | 1997-02-12 | $7700.00 | Window Closed / Lapsed |