Hi Tony,
Does this methode support TSSOP with 0.65 mm between pins ?
Thanks,
Vasile


On Tue, 28 May 2002, Tony Nixon wrote:

> Hi all,
>
> I found a flat bed heat press at work the other day and it kindled my
> thoughts on using PCB designs from photo copiers or laser printers.
>
> I know this has been hashed before, but I thought I'd throw in a couple
> of my own observations.
>
> To cut a long story short, I tried various printable high gloss media
> with poor results. Even to the point of "flooding" the copier with
> excess toner that wouldn't adhere to the media surface. Even if I did
> manage to get a reasonable copy that didn't smear, it sometimes wouldn't
> stick to the PCB after the heat press treatment.
>
> It eventually occurred to me that there was a tug of war going on
> between the toner and the two surfaces.
>
> I ended up roughing the PCB copper up so that it looked similar to the
> new hone marks on a cylinder wall, although much finer using a kitchen
> scourer pad. Lots of fine criss-cross patterns.
>
> I then used the backing paper from Celcast photo copier film which has a
> shiny surface from which the sticker peels off, but the back of it is
> "semi" shiny, and this was the side I used for the toner copy. It is
> just porous enough to hold the toner, without messing up the copier, but
> not as strongly as the roughed up PCB surface. This plastic backing film
> is also tolerant to the heat produced in copiers and laser printers.
>
> After pressure heating and cooling of the design, the PCB with it's
> rough surface wins the toner tug of war and about 99.5% adheres quite
> strongly to the PCB surface. A few touch ups with a Dalo pen and all is
> well.
>
> I've used lines down to 15mil and it seems quite ok.
>
> Overall, I was quite impressed and it will prove very useful in the
> future for proto boards and such.
>
> --
> Best regards
>
> Tony
>
> mICros
> http://www.bubblesoftonline.com
> mailto:sales@bubblesoftonline.com
>
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