The traditional inspecting methods for PWB depend on manual work a lot, which are very underdeveloped and face austere challenge.

传统印刷线路板的检测方法很大程度上依靠人工，这种落后的测试方法面临着严峻的挑战。

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Due to the wire width and the space between wires on PWB becoming finer the insulating capability of PWB is affected by ionic migration, that was not paid enough attention to for a long time.

由于印刷线路板的线宽和线间间隔的细微化，以往不引人注意的离子迁移现象已经对线路板的绝缘性能造成影响。

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