--- In
Homebrew_PCBs@yahoogroups.com, "rmustakos" > I'm about to try
some TT stuff. I'm not ready to etch, yet, but I
> want to play with TT some to get the transfer right. I printed out
a
> design with 6 mil lines and spacing using an HP1200, and it looks
> great on paper (like so many other things <G>). Do the lines widen
> when you transfer? Or is there something with the etching that
limits
> the minimum width?
I'd probably try something on the order of 10-12mil at first --those
are fairly easy. 6mil is doable, but will take a bit of practice. I
try to avoid anything under 8mil trace/ 6mil clearance, simply
because (1)my printer is 600dpi and I get aliasing below that (2)
without a solder mask it's pretty easy to damage a 6mil trace when
soldering (although with hot air, you can get away with quite a
bit). That said your 1200 dpi should give you better results; but
I'd suggest you try some looser tolerances until you've done a few.
As a side, has anyone done any homebrew pcb/ bga placement? TT or
not.