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Method of Performing Adhesion Peel Tests on Unsupported Decal Film

IP.com Disclosure Number: IPCOM000040669D
Original Publication Date: 1987-Dec-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Busacco, RA: AUTHOR [+3]

Abstract

A peel test is used to measure the adhesion of a metalized surface to decal film. The peel test is performed by pulling a metalized circuit line vertically while holding the decal in a horizontal position. Because the decal film is thin, the pulling of the circuit line flexes the film, which gives a false reading of peel data. To eliminate the false reading, a metal slug is epoxied to the back side of the decal to reinforce the film, thereby preventing its flexing. While the addition of the slug prevents flexing, it creates other problems, i.e., effort to attach slug, remove it, etc. A method of accurately measuring peel strength, without utilizing a slug, is described in the following method. In Fig. 1 a decal film 1 with a supporting frame 2, has the active area 3 cut away from the frame.

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Method of Performing Adhesion Peel Tests on Unsupported Decal Film

A peel test is used to measure the adhesion of a metalized surface to decal film. The peel test is performed by pulling a metalized circuit line vertically while holding the decal in a horizontal position. Because the decal film is thin, the pulling of the circuit line flexes the film, which gives a false reading of peel data. To eliminate the false reading, a metal slug is epoxied to the back side of the decal to reinforce the film, thereby preventing its flexing. While the addition of the slug prevents flexing, it creates other problems, i.e., effort to attach slug, remove it, etc. A method of accurately measuring peel strength, without utilizing a slug, is described in the following method. In Fig. 1 a decal film 1 with a supporting frame 2, has the active area 3 cut away from the frame. The decal film 1 is placed over a support plate 4 (Fig. 2) with the test circuit lines 5 facing upward. The film 1 is held in place with adhesive tape 6. A spring clamp 7 is attached to the sides of the secured film 1, and the circuit line 5 is peeled and measured for peel strength. On continuous or reel-to-reel tape, the decal film does not have a supporting frame which necessitates a sample section to be cut out and the previous procedure followed. In those situations where decal film has extremely high adhesion that would result in tearing of the film when peeling, the film is epoxied directly to the support...