Project:PCB Making: Difference between revisions
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=== Removing remaining photoresist layer === | === Removing remaining photoresist layer === | ||
Once the unwanted copper has been etched, there is still photoresist left on the remaining copper. It is practical to expose the board again, thus weakening the photoresist, then repeating the sodium silicate rinse. | Once the unwanted copper has been etched, there is still photoresist left on the remaining copper. It is practical to expose the board again, thus weakening the photoresist, then repeating the sodium silicate rinse. Note that removing the resist on most types of photosensitive board is not necissary unless you are going to tin plate the PCB. The resist protects the copper from oxidising and also acts as a flux when soldering so it can be benificial not to strip it. | ||
== Tried and Tested Settings == | == Tried and Tested Settings == | ||
