This weekend I etched some boards with .010" wide traces with .010" wide spacing. After etching I found a couple of traces "broken" so I had to repair them and with these old eyes, it wasn't easy but I did get it. I tinned the board using solder paste (plumbers paste) as I have been doing. I then extracted some strands of conductor from stranded wire and tinned that. To make the "jumper", I laid the strand against the trace, and pressed down with the soldering iron tip and it held. It worked fine for all the breaks I had to fix. I did try to drag solder over the gaps to bridge them, but couldn't get that to work. Further complicating it was the small traces and close proximity of the traces - I would end up shorting out several traces together. While not an ideal solution, it worked pretty good. As to the reason for the breaks in the traces - just being in too much of a hurry. After doing the toner transfer, I inspected the boards very good and did notice the missing toner. Knowing that the Sharpie pen is too blunt to patch the spot, I just went for the etching. I really should have cleaned the boards and tried the transfer process again - it would have been much faster and easier. Chris
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Fixing traces... not fun but certainly doable!
2006-01-17 by lcdpublishing
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