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Measuring the Absolute Peel Strength of Deposited Films

IP.com Disclosure Number: IPCOM000075370D
Original Publication Date: 1971-Sep-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 22K

Publishing Venue

IBM

Related People

Campagna, FJ: AUTHOR [+2]

Abstract

This apparatus will measure the absolute peel strength of a film to its support in a true static condition. The system allows the operator to zero-in on the actual force required to peel a film of a given width by merely observing a deflection in a torsional beam. The desired accuracy is accomplished by recording the force required to initiate the peel; that is by recording the force required to peel the film and the maximum load that will not peel the film are equal.

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Measuring the Absolute Peel Strength of Deposited Films

This apparatus will measure the absolute peel strength of a film to its support in a true static condition. The system allows the operator to zero-in on the actual force required to peel a film of a given width by merely observing a deflection in a torsional beam. The desired accuracy is accomplished by recording the force required to initiate the peel; that is by recording the force required to peel the film and the maximum load that will not peel the film are equal.

In the apparatus, a substrate 10 with an adherent film 12 is supported on base 14. Film 12 is attached to one end of torsional beam 16 that is supported on a knife edge 18. Weights are added to load pan 20 to determine the minimum load required to peel film 12 from substrate 10.

Uniform loading can be accomplished by either liquid displacement or a chain balance cycle. A gold chain will apply a load in fine increments. Accuracy of measurement is improved by lengthening the time intervals between readings to increase the resolution of the peel to no peel condition.

This technique can be made less operator dependent by sensing the beam deflection with transducers using a X-Y recorder as a readout.

Increased sensitivity can be obtained by placing the knife edge closer to the load platform thus amplifying the applied load.

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