Probably not a direct answer to your question, but after many years of
trying all sorts of methods for 1 off PCB production with inconsistent and
generally poor results I tried again recently using a Canon LBP2000i laser
printer, master on to 90gsm tracing paper + photoresist boards, printer set
to max toner density. This printer was bought as a second printer and was
the cheapest I could find.  The results were excellent - really opaque
tracks on the tracing paper down to 0.3mm and the final PCB was something to
be proud of, no rework, no half missing tracks etc. Previously tried Brother
& HP printers with poor results. Also tried TT with these, sometimes works,
sometimes not, seems to be no way to achieve consistent results.

Charles



-----Original Message-----
From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of
Peter Restall
Sent: 10 March 2009 19:39
To: piclist@mit.edu
Subject: [EE] Toner Transfer / Brother Lasers


Evening All,

I've just run out of my photoresist developer (actually, it half
crystallised
and lost its potency too).  So I decided to give the TT method a try, but
didn't have much luck - the toner didn't adhere to the board and just came
away with the paper (tried photo, magazine and regular).

Unfortunately I've been reading bits and pieces that tell me Brother laser
printers use a different type of toner with higher melting temperature, but
no real specifics.  Has anybody managed to do a TT with a (Brother or reman)
TN3170 or TN3130 toner (my specific printer model is HL5270DN), or know of
any other possible method of PCB production that doesn't involve me shelling

out for more chemicals ?  The irony of this is that I was trying to etch my
first stepper driver board for a CNC machine, but that's obviously not an
option to make a board yet...

Cheers,

Pete Restall
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