Hauv PCB pov thawj, ib txheej ntawm cov hlau lead-tin tiv thaiv yog pre-plated rau ntawm cov ntawv ci tooj liab yuav tsum tau khaws cia rau ntawm txheej txheej ntawm lub rooj tsavxwm, uas yog, daim duab ntawm lub voj voog, thiab tom qab ntawd cov ntawv nyiaj seem tooj liab yog tshuaj etched. deb, uas yog hu ua etching.Yog li, hauv PCB pov thawj, dab tsi teeb meem sho ...
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