11 Apr
2013
11 Apr
'13
8:34 p.m.
On Thu, Apr 11, 2013 at 03:07:27PM -0400, David Riley wrote:
I gave up ferric chloride etching in high school. I
couldn't get the
yields up high enough. I was always tempted to try the photoresist
presensitized stuff, but it was EXPENSIVE, so I never did.
I tried it a little and had no luck getting consistent exposure.
The pens don't cover too well either (but they'll do in a pinch).
The Datak direct-etch dry transfers work *great* but it's a hell
of a lot of work for each board.
Haven't touched any of this in ages -- these days I'm a germ farmer
(septic tank). I'm not sure a gallon or two of FeCl3 would be enough to
sterilize it but there's no way I'm risking it just to save a few $$$
from oshpark.com (which kicks ass) or batchpcb.com
(which used to until
they botched a web-site upgrade last September and still
can't be bothered
to fix it).
John Wilson
D Bit