Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

I saw a process used by a fab house and they used a negative photo
resist and then tin coated the board. The tin only stuck to the
places that had the bare copper. Then the board was chemically etched
and the tin protects the copper. Would we possibly be able to come up
with a similar system of printing a negative image and then tin
plating before etching? The toner would probably melt when you tried
to tin the board with an iron, but maybe a chemical plating process?

Does anyone know for sure if tin etches away with FeCl? I might have
to try it at lunch...haha.

matt