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What is the real use of a PCB pen?

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tR|GG3rX

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PCB Pen

what is the real use of this PCB pen?
just draw on the blank PCB and after that, just go for etching?
 

neelandan

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PCB Pen

A PCB pen can be used for simple layouts, layouts you can draw directly on to the copper clad board at one sitting. Then you drop it into a tray of etchant (ferric chloride solution) and the copper not covered by the ink gets etched away.

The board has to be extremely clean, otherwise the tracks get smudged and / or etched.
 

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