Homebrew PCBs

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
> 
>