Flash fusing is what I call remelting the toner in
place. Using a hair dryer, very close to the pcb, the
toner softenes and remelts, but doesn't move. It does
seem to work and gives better adhesion to the pcb.
The "film" people sell a laser foil that is used for
during a second fusing step. I've used regular laser
foil and it seemed that the second heating "smoothed'
out the toner.
It's somethiing that worked for me, it doesn't take
much time. I've added it to my Toner transfer
procedure.
Myc
--- onenastyviper <
oneNastyViper@...> wrote:
> Hi, what is flash fusing?
>
> PK
>
> --- In Homebrew_PCBs@yahoogroups.com, Mycroft2152
> <mycroft2152@...>
> wrote:
> >
> > I just ran up a few boards last weekend. I've had
> a
> > great success with the Staples inkjet paper, but
> based
> > on the recent discussions, and the fact I had some
> > extra time, I decided to try a few other papers
> and
> > techniques.
> >
> > I am using a Samsung ML-2010 with third party
> refill
> > toner and a Xerox laminator.
> >
> > Paper: the best and most amazing result was with
> the
> > paper from the SEARS flyer in the sunday paper!
> Great
> > transfer and almsot fell off under hot water.
> >
> > Fusing the toner: after removing the paper and
> before
> > etching, I flash fused the toner using a hair
> dryer. I
> > flash fused half of a test board. The flash fused
> > portion has excellent 0.006" traces, where the
> > "normal" 0.006" traces were very crappy and had
> gaps.
> >
> > Etching: I used a Muriatic Acid / H2O2 etch. 3
> parts
> > water, 2 parts Muriatic Acid and 1 part 40 volume
> > H2O2. It gave a etching time of about 3 minutes. A
> > little quick, next time I'll reduce the H2O2 a
> bit.
> >
> > "Tinning": Well not actually "tinning" per say
> more
> > like protecting the traces from oxidation. I had
> read
> > about using Future floor wax as a resist. And yes
> it
> > does work. This time I wiped a thin coat on the
> trace
> > side after etching and let it dry. Soldering was
> no
> > problem.
> >
> > Just a few more tweaks to the Toner Tranfer
> process.
> >
> > Myc
> >
> >
>
>
>
>
>
>
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