 |
| Next
stage was to etch the board (remove the unwanted copper). Ferric
Chloride is probably the most widely used chemical for DIY purposes but
it is dark brown and will stain ANYTHING it comes into contact with. I
used a virtually clear etchant produced by the manufacturer of my
boards. It took about 25 min to eat away all the unwanted areas with
the chemical at 45 deg centigrade. It was then rinsed and the remaining
film, which was protecting the tracks, was removed with some Acetone soaked
Kitchen Roll. It's important not to touch the bare copper as the
grease in your fingers will damage it, hold the board by the edges. |
 |
 |