| 摘要 |
A flexible printed substrate has a flexible substrate made of a resin insulating material such as polyester resin and a conductive pattern formed thereon. The conductive pattern is composed of conductive powders consisting of palladium-silver alloy powders and a binder made of an organic resin material such as phenol resin. The palladium-silver alloy powders comprises at least 30 wt. % but less than 100 wt. % of palladium and, as the remaining portion, silver. The conductive powders are a mixture of flaky alloy powders and spherical alloy powders, wherein the former is contained in an amount of at least 50 wt. % but not greater than 70 wt. % and the latter is contained as the remaining portion. Both migration and sulfidization of the conductive pattern thus formed are decreased with respect to conventional conductive patterns and inexpensive flexible printed substrates can be provided.
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