Homebrew PCBs

----- Original Message ----- 
From: "DJ Delorie" <dj@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Friday, July 04, 2008 8:14 PM
Subject: [Homebrew_PCBs] today's problem...


> 
> Anyone see these extra bits of photomask after developing?
> 
> http://www.delorie.com/pcb/inkjet/mask-bits.jpg
> 
> This is at 200x, the gap is only 6 mil.  I've tried extra developing,
> rinsing under high-pressure water, and scrubbing with a sponge.  I can
> get them out one at a time with a pin, but that's not an acceptable
> solution.  I'm even exposing a step less than usual in case it's from
> a pinhole.

Dust? Or defects in the resist film.

Leon
--
Leon Heller
Amateur radio call-sign G1HSM
Yaesu FT-817ND and FT-857D transceivers
Suzuki SV1000S motorcycle
leon355@...
http://www.geocities.com/leon_heller