Still waiting for some parts for the MCU version,l but I just ran a
test board and found:
1 - All 5 mm traces are intact.
2 - 5 mil traces/10 mil spaces works perfectly - no shorts, no open
traces, no "near misses".
3 - 5/5 does not. The traces are intact but they spread into the
spaces and short together in many areas. The obvious conclusion is
that the traces are wider than 5 mil.
One solution might be to make the traces even thinner so if they
spread it won't obliterate the spaces.
What I need is a good way to measure the thicknesses. I do have a
stage micrometer for my microscope, but I really would like a USB
microscope with software to measure. Does anyone have a suggestion?
I could also use a test pattern that has a variety of traces/spaces.
Does anyone have one in some common format?
Thanks for your encouragement and suggestions.
Mark
Message
Re: [Homebrew_PCBs] DLP results and help wanted
2014-08-10 by James
5/5 is better than most cheap board houses would advertise (6/6 is fairly typical). Do you really need to get down to that? 8/8 is what most people strive to achieve at home.
On Sat, Aug 9, 2014 at 9:01 AM, Mark Lerman mlerman@... [Homebrew_PCBs] <Homebrew_PCBs@yahoogroups.com> wrote: