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Vapor Deposited Adhesion Promoters

IP.com Disclosure Number: IPCOM000083440D
Original Publication Date: 1975-May-01
Included in the Prior Art Database: 2005-Mar-01
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Mittall, KL: AUTHOR [+2]

Abstract

Polymer films have been used on metal surfaces for corrosion protection and abrasion resistance. Best results are obtained when the polymer films are securely bonded to the metal surface. Many polymer films provide only mechanical bonding and improved adhesion is obtained by applying a thin layer of an adhesion promoter, which bonds chemically to the metal surface and the polymer overcoat.

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Vapor Deposited Adhesion Promoters

Polymer films have been used on metal surfaces for corrosion protection and abrasion resistance. Best results are obtained when the polymer films are securely bonded to the metal surface. Many polymer films provide only mechanical bonding and improved adhesion is obtained by applying a thin layer of an adhesion promoter, which bonds chemically to the metal surface and the polymer overcoat.

A vapor deposition system is used to apply a thin layer of adhesion promoter prior to deposition of a polymer film. One of the adhesion promoters shown in Table I or a mixture may be heated under vacuum and deposited on the metal surface, which is at room temperature. The chamber pressure is usually less than 0.1 torr during the deposition of the adhesion promoter. The film thickness of the adhesion promoter is measured with a quartz crystal thickness sensor.

The water vapor required to react with the silane can be obtained by vapor diffusion through the polymer film after the deposition process is complete. Contact angle measurements with water (Theta H(2)O > 40 degrees) indicated the presence of silanes on the previously clean metal surfaces (Theta H(2)O > 5 degrees). The contact angle is dependent on the chemical composition of the adhesion promoter. The silanes were vapor deposited on the metal surfaces which were then tested for the presence of a film. Table I

Film Deposition

Thickness Pressure

Adhesion Promoter Angstroms Torr

Gamma-amino...