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Homebrew PCBs

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Message

Tiny SMD traces

2002-06-03 by brainlessbill

Hello All,
I'm new to the group, and still a beginner at homebrew PCBs, so I'll 
introduce myself by hammering you all with a tough one (for me, 
anyways).  I recently bought a couple of LCDs with Horz-Bottom SMD 
connectors (I should have read the not-so-fine print).  The pins 
are .2mm wide on .5mm centers. Does anyone have a technique to etch 
these fine traces?  So far I have only tried photoetching using 
transparencies and my Brother HL1240 printer, which leaves a few 
pinholes that I can't fill in.  Also, the ferric chloride seems to 
undercut some of the resist that does remain after exposure.

Any pointers would be appreciated.  I had planned on using the LCDs 
for debug readouts for a PCB mill that I am building.

Thank you,

Bill Byler

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