Homebrew PCBs

Hello,
What is the min trace width while using a transfer product liek press
and peel blue? I want to use SSOP parts and these have pads that are
0.38 mm wide is this feasabile?

Josiah

On Sat, 01 May 2004 17:22:28 -0000, cpexed <cpexed@...> wrote:

> Hello,
> What is the min trace width while using a transfer product liek press
> and peel blue? I want to use SSOP parts and these have pads that are
> 0.38 mm wide is this feasabile?
>
> Josiah
>

i have some 7 mil with toner transfer on inkjet paper (much lower $ than 
pnp)

<http://stud4.tuwien.ac.at/~e0225977/pcb.jpg>

good luck

ST

Stefan,

Which printer/toner did you use? Which etchant?

Thank you in advance,

Ballendo

--- In Homebrew_PCBs@yahoogroups.com, Stefan Trethan 
<stefan_trethan@g...> wrote:
> i have some 7 mil with toner transfer on inkjet paper (much lower $ 
than 

> pnp)
> 
> <http://stud4.tuwien.ac.at/~e0225977/pcb.jpg>
> 
> good luck
> 
> ST

--- In Homebrew_PCBs@yahoogroups.com, "cpexed" <cpexed@y...> wrote:
> Hello,
> What is the min trace width while using a transfer product liek press
> and peel blue? I want to use SSOP parts and these have pads that are
> 0.38 mm wide is this feasabile?

Look in Files:

http://groups.yahoo.com/group/Homebrew_PCBs/files/Toner_Transfer/

A couple photos of someone's 8 mil traces with 8 mil spacing, and that
was not PnP blue. I think he said he used an inkjet paper.

Hmm... and .38mm is about 15 mils

Steve

HP LJIIID and ALL the error comes from it (rough edge).
The added error of the transfer is much lower than the bad quality of the 
printout.
It seems to be the opposite, things get smoothed out a bit and the 
"sprinkled toner"
(small particles strewn around) are not transferred.

I have HUGE problems with thick traces, pinholes everywhere.
Need another printer.

ST

On Sun, 02 May 2004 01:03:34 -0000, ballendo <ballendo@...> wrote:

> Stefan,
>
> Which printer/toner did you use? Which etchant?
>
> Thank you in advance,
>
> Ballendo
>
> --- In Homebrew_PCBs@yahoogroups.com, Stefan Trethan
> <stefan_trethan@g...> wrote:
>> i have some 7 mil with toner transfer on inkjet paper (much lower $
> than
>> pnp)
>>
>> <http://stud4.tuwien.ac.at/~e0225977/pcb.jpg>
>>
>> good luck
>>
>> ST
>
>
>
>
> Be sure to visit the group home and check for new Bookmarks and files:
> http://groups.yahoo.com/group/Homebrew_PCBs
> Yahoo! Groups Links
>
>
>
>
>

--- In Homebrew_PCBs@yahoogroups.com, Stefan Trethan 
<stefan_trethan@g...> wrote:
> HP LJIIID and ALL the error comes from it (rough edge).
> The added error of the transfer is much lower than the bad quality 
of the 
> printout.
> It seems to be the opposite, things get smoothed out a bit and the 
> "sprinkled toner"
> (small particles strewn around) are not transferred.
> 
> I have HUGE problems with thick traces, pinholes everywhere.
> Need another printer.
> 
> ST

I found in the few TT  boards I have ever made, was that the dusting 
all over the board were undercut by the acid so fast that they never 
posed a problem.

Also, that in melting the toner, it covered better in some areas.

I too had a problem with getting really dark black areas in large 
sections.  I am not sure if it has to do with the laser model being 
old, or if it has more to do with the electrostatic exhanges in an 
area of the toner.

for large areas, I always went back with a marker and filled in the 
holes.

Dave







> 
> On Sun, 02 May 2004 01:03:34 -0000, ballendo <ballendo@y...> wrote:
> 
> > Stefan,
> >
> > Which printer/toner did you use? Which etchant?
> >
> > Thank you in advance,
> >
> > Ballendo
> >
> > --- In Homebrew_PCBs@yahoogroups.com, Stefan Trethan
> > <stefan_trethan@g...> wrote:
> >> i have some 7 mil with toner transfer on inkjet paper (much 
lower $
> > than
> >> pnp)
> >>
> >> <http://stud4.tuwien.ac.at/~e0225977/pcb.jpg>
> >>
> >> good luck
> >>
> >> ST
> >
> >
> >
> >
> > Be sure to visit the group home and check for new Bookmarks and 
files:

> > http://groups.yahoo.com/group/Homebrew_PCBs
> > Yahoo! Groups Links
> >
> >
> >
> >
> >

>
> I found in the few TT  boards I have ever made, was that the dusting
> all over the board were undercut by the acid so fast that they never
> posed a problem.
>
Seems so..

> Also, that in melting the toner, it covered better in some areas.
>
> I too had a problem with getting really dark black areas in large
> sections.  I am not sure if it has to do with the laser model being
> old, or if it has more to do with the electrostatic exhanges in an
> area of the toner.
>
> for large areas, I always went back with a marker and filled in the
> holes.
>
> Dave

this is always a problem with laser printers/copiers.
But i think the older the printer and the thicker the paper the worse it 
gets.

I can't make any traces 20mil, i get long areas where it actually results
in two parallel lines, with the middle beeing a single long "pinhole".

It is sometimes better, sometimes worse.

This printer always had problems with toner coverage, this is also the 
reason why
i have given up on photo process, i can't get a useable transparency.

ST