LIFE ESTIMATION METHOD OF PRINTED WIRING BOARD, PRINTED WIRING BOARD AND LIFE ESTIMATION DEVICE OF PRINTED WIRING BOARD

摘要

PROBLEM TO BE SOLVED: To estimate the life of a printed wiring board by measuring migration generated between electric wirings of a printed wiring board quantatively without having to a device wherein a circuit board is incorporated. ;SOLUTION: Measurement conductors 15, 16 are wired adjacent to an electronic circuit 14 on a board 12 by a print means. The measurement conductors 15, 16 are formed of a metal which generates migration more easily than an electric wiring 13 and a pair of comb-like electrodes 17, 18 which face each other are constituted in a counter terminal side. When a voltage is applied to a terminal 13a of the electric wiring 13, a voltage is also applied between the measurement conductor 15, 16 synchronously with the voltage application. Therefore, generation of migration of the measurement conductors 15, 16 can be checked by measuring a resistance between the measurement conductors 15, 16, thus enabling generation of migration (life) of the electric wiring 13 to be estimated.;COPYRIGHT: (C)1997,JPO