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Subject: Re: [Homebrew_PCBs] Double sided vs single sided fr4

From: JanRwl@...
Date: 2006-03-02

In a message dated 3/2/2006 8:37:50 A.M. Central Standard Time,
sbdwag@... writes:

how I could cover the top side without putting a resist layer on it before I
etch.<<
What, you want to leave "unetched copper" on the TOP? That will short
intermittantly to ALL through-hole lead-wires, and will NEVER work! Unless you
counterbored EVERY hole with a larger-dia. drill, and then made EXTRA certain
not to push parts all the way down against the top copper before soldering on
the bottom! VERY cumbersome! Does NOT compute!

Most plain spray-paint will act as decent resist if you let it DRY, and
don't scratch it during handling. But be careful the "overspray" doesn't mess up
your resist-pattern on the other side! Better: Simply etch-AWAY all the
unneeded copper on the top side!







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