ION MIGRATION ASSESSMENT TEST METHOD FOR PRINTED CIRCUIT BOARD INSULATING MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide an ion migration assessing method effectively and surely detecting the possibility of generation of ion migration, in a printed circuit board insulating material.;SOLUTION: This ion migration assessment test method for the printed circuit board insulating material is so constituted, that a thin film is formed of the printed circuit board insulating material, electrolyte having an electrode dipped therein is brought in contact with one surface of the thin film, pure water having the other electrode dipped therein is brought in contact with the other surface, the negative side terminal of a DC voltage is connected to the electrode dipped in the pure water, and the ion concentration of the pure water is detected, while making the DC current flow across both the electrodes.;COPYRIGHT: (C)2002,JPO