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| What is the reason for circuit board production water marks and how to avoid? |
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Water mark are foreign leave traces of dirt in the water to evaporate back panels, or partial oxidation of the copper surface color problem. Water itself can not remain problems, so foreign body, local oxidation is the key issue. Circuit board production have many cleaning procedures, but drying process is heating and drying. but the problem lies in the process, if there are impurities in the water, foreign body left in the residue after removal of water will see the shadow of the board, or have to face hot water but there are still massive residual chromatic aberration, which is called water marks.
Processing also required from the above .
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