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Is There an Etchant-Resist That Can Be Left On PCB As Insulator? Answered

howdy

is there a kind of resist that can be left on the pcb after etching (except the solder points), as an electrical insulator?

can it be used with the photo-etching method, or only heat?

thanks

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steveastrouk (author)2012-06-17

All professional boards use permanent solder mask, its another UV hardening coating, washed off after exposure, then cured.

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user

PS. Its still referred to as a "silkscreen", though some people use that to refer to the component reference screen.

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mpilchfamily (author)2012-06-13

Your looking for a solder mask but that is only needed is your doing wave soldering to prevent the solder from going onto all the traces. most solder masks you can buy are only meant to last as long as it would take to solder the board then get washed off. So they may peal and look bad over time.

Why do you feel the need to insulate the traces? If the project has components crossing traces that could short then put some heat shrink on those leads so no contact is made. If your worried about an electrical hazard for people then the project should be put into some sort of case or enclosure.

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johnyradio (author)mpilchfamily2012-06-16

"most solder masks you can buy are only meant to last as long as it would take to solder the board then get washed off. So they may peal and look bad over time."

oh, ok. a board that came with a kit i bought has a greenish layer over the traces, and i liked the insulation it provides. of course a project should go in a case, but i like redundant protection.

thanks!

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