Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


PCB Silk Screen changing Color after Reflow

Views: 1716

#72566

PCB Silk Screen changing Color after Reflow | 13 August, 2014

We are seeing some PCBs especially from foreign sources that exhibit silk screen color change after reflow? Has anyone else seen this lately?

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#72987

PCB Silk Screen changing Color after Reflow | 30 October, 2014

Reason is the quality of silk screen oil is bad.

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#72998

PCB Silk Screen changing Color after Reflow | 2 November, 2014

What's the specification of the PCB, usually the silk screen can not change.

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#73089

PCB Silk Screen changing Color after Reflow | 16 November, 2014

Seen it. We use a lead free process, sometimes our supplier will use a lead process silk screen that burns at a lower temp. The HASL coat was still SN100CL.

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