Protected conductive foil and procedure for protecting an electrodeposited metallic foil during further processing
AssigneeGould Inc.
InventorsRolland D. Savage, John P. Callahan
Life of this patent
Estimating the term…
Abstract
A conductive copper foil for use in preparing printed circuit boards is protected from damage during storage, shipment and further processing by covering one side of the foil with a sheet of polyethylene film. The film is removably joined with the foil by an adhesive material placed between the film and the foil in a marginal area of the latter. The film is selected to be sufficiently resistant to laminating temperature and pressure conditions so as to remain in its covering, protecting relationship to the foil and avoid sticking to the laminating press plate and retain its removability from the foil after lamination.
Claims58
A protected conductive foil assemblage comprising:
- a conductive metallic foil having two sides, a shiny side and a matte side, the matte side being adapted for bonding to a dielectric support during a lamination process involving pressing between plates of a laminating press;
- and
- a plastic film layer overlying the other side of the foil in covering, protecting relationship thereto,
- said plastic film layer being removably joined to the foil sufficiently to permit movement and further processing of the foil with the film layer remaining in said covering, protecting relationship to said other side of the foil,
- said plastic film being sufficiently resistant to the temperature and pressure conditions encountered during a lamination process to avoid sticking to a laminating press plate and to retain its removability from the other side of the foil after lamination of the foil to a dielectric support.
A procedure for protecting an electrodeposited conductive metallic foil during further processing comprising:
- providing a piece of conductive foil having two sides, one side of the foil being adapted for bonding to a dielectric support by a lamination process involving pressing between plates of a laminating press;
- providing a layer of plastic film;
- placing said layer of film over the other side of said piece of metallic foil in covering, protecting relationship to said other side;
- and
- removably joining said layer of film With the metallic foil sufficiently to permit movement and further processing of the foil with the film layer remaining in said covering, protecting relationship to said other side of the foil,
- said plastic film being sufficiently resistant to the temperature and pressure conditions encountered during a lamination process to avoid sticking to a laminating press plate and to retain its removability from the other side of the foil after lamination of the foil to a dielectric support.
A protected conductive foil laminate comprising:
- a conductive metallic foil having two sides;
- a plastic film layer overlying one side of the foil in covering, protecting relationship thereto;
- and
- a dielectric support bound to the other side of the foil as a result of having undergone a lamination process involving pressing between plates of a laminating press,
- said plastic film layer being removably joined to the foil sufficiently to permit movement and further processing of the foil with the film layer remaining in said covering, protecting relationship to said other side of the foil,
- said plastic film being characterized as having initially been sufficiently resistant to the temperature and pressure conditions encountered during the lamination process to avoid sticking to a laminating press plate and to retain its removability from the other side of the foil after lamination of the foil to said dielectric support.
Dependencies are inferred from the claim text.