Significance and Use
7.1 The electrical and mechanical characteristics of circuits produced from flexible composites of copper foil with dielectric materials will, to a large extent, depend on the properties of the dielectric portion of the composite. Measurement of these properties is essential for predicting performance of the circuit.
Scope
1.1 These test methods cover procedures for testing flexible materials consisting of copper foil combined with either dielectric film or with treated or impregnated fabric to form flexible composites used in the manufacture of flexible or multilayer circuitry, or both.
1.2 The procedures appear as follows:
| Procedure | Section | ASTM Reference Method |
| Conditioning | 5 |
|
| Flex Life of the Composite | 20 – 25 |
|
| Peel Strength of the Composite | 11 – 19 |
|
| Specimen Preparation | 6 | D1825 |
| Strain Relief Due to Etching | 26 – 32 |
|
| Testing of the Dielectric Portion of      the Composite | 7 – 10 | D1825, D2305, D902   |
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
