Archive of the former Yahoo!Groups mailing list: Homebrew PCBs
Subject: methods of developing double-sided PCBs without an UV exposure unit
From: "Mark Farnell" <farnell_mark@...>
Date: 2003-07-07
Is it necessary to expose both sides of a photosensitive PCB
simutaneously, so that I can dip the entire board into a sodium
carbonate tank?
Otherwise if I expose one side first, I have to develop it
immediately, otherwise it will be overexposed. However it would not
be nice when I have to dip the entire board (include the opposite
side which is covered by tape and not yet exposed) into the
developing solution. Also, it would be messy if I spray the
developing solution onto the exposed side because the developing
solution will still seep onto the unexposed side!
Mark