| 摘要 |
PURPOSE:To accurately detect the mechanical and physical properties of a film forming substance under a real condition by forming grip parts of both ends of an org. synthetic film having a conductive film formed to the surface layer thereof and measuring the resistance value of the conductive film when tensile load is applied to the film. CONSTITUTION:An org. synthetic film 2 such as a polyimide film is mounted on the aluminum substrate 6 fixed to a jig 10 and fixed by press metal fittings 11 while both end surfaces thereof are pulled and heated to be formed into a membrane in a predetermined forming process. Next, punching processing is applied to both ends of the film 2 so as to form the grip parts 3 engaged with the chucks 7 of a tensile tester 5 to form a test piece 4 to be evaluated. When the tensile strength of the test piece 4 is measured by the tester 5, the resistance value of the conductive film of the test piece 4 is measured at the same time by a measuring device 9 and the discontinuous increase point of the resistance value, that is, the strength at the time of the cutting-off of continuity due to a crack of the conductive film is read to evaluate the mechanical strength and elongation of the conductive film. |
