Homebrew_PCBs

I have done 15mil using 600dpi laser printer (a very
good but old Canon), and now am thinking of buying a
new laser printer.

I am thinking of something from HP/Canon/Xerox.

Nothing from Samsung (I am posetive anyone who has
used a Samsung before will never sing to it again)

Altough I can budget for the 1200dpi HP LaserJet 1320
or Xerox Phaser 3150, I am thinking of buying a 600dpi
laser, provided it can handle 8mil traces.

Do anyone of you have done 15 to 8mil traces using
600dpi laser printer ? What model ?

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Kamal,

I think you can do 8 mil., but I don't know how well it will
transfer to the copper and how well it will hold up during etching.
The best I could get reliably was .012" 12 mil wide traces. The
printing doesn't appear to be the problem as much as the transfer
and etching of such small traces.

Chris



--- In Homebrew_PCBs@yahoogroups.com, Kamal Shankar
<kbshankar2000@...> wrote:

>
> I have done 15mil using 600dpi laser printer (a very
> good but old Canon), and now am thinking of buying a
> new laser printer.
>
> I am thinking of something from HP/Canon/Xerox.
>
> Nothing from Samsung (I am posetive anyone who has
> used a Samsung before will never sing to it again)
>
> Altough I can budget for the 1200dpi HP LaserJet 1320
> or Xerox Phaser 3150, I am thinking of buying a 600dpi
> laser, provided it can handle 8mil traces.
>
> Do anyone of you have done 15 to 8mil traces using
> 600dpi laser printer ? What model ?
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam? Yahoo! Mail has the best spam protection around
> http://mail.yahoo.com
>

Hi kaml,

I'm using a Samung ML-2010 for toner transfer. It
works fine. Any toner transfer process needs to be
fine tuned for the specific combination of
printer/toner/paper/laminator.

After that is accomplished the process is routine.

I had been using an old laserjet IIP+ with good
results.

TANSTAAFL!

Myc


--- Kamal Shankar <kbshankar2000@...> wrote:

> I have done 15mil using 600dpi laser printer (a very
> good but old Canon), and now am thinking of buying a
> new laser printer.
>
> I am thinking of something from HP/Canon/Xerox.
>
> Nothing from Samsung (I am posetive anyone who has
> used a Samsung before will never sing to it again)
>
> Altough I can budget for the 1200dpi HP LaserJet
> 1320
> or Xerox Phaser 3150, I am thinking of buying a
> 600dpi
> laser, provided it can handle 8mil traces.
>
> Do anyone of you have done 15 to 8mil traces using
> 600dpi laser printer ? What model ?
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam? Yahoo! Mail has the best spam
> protection around
> http://mail.yahoo.com
>

__________________________________________________
Do You Yahoo!?
Tired of spam? Yahoo! Mail has the best spam protection around
http://mail.yahoo.com

> I think you can do 8 mil., but I don't know how well
> it will
> transfer to the copper and how well it will hold up
> during etching.

My point exactly. Along your lines, I can print 5mil
very well udinh my 600dpi laser, but it's badly
smudged after the transfer.

Would getting a 1200dpi help (perhaps the edges would
be clearer) ?

> The best I could get reliably was .012" 12 mil wide
> traces. The
> printing doesn't appear to be the problem as much as
> the transfer
> and etching of such small traces.

The crucial point in TT is the paper. The paper will
make or break the whole process. But even with good
laser sheets, 8/8 has NEVER worked for me @ 600dpi

Perhaps the edges were not that good.

What I am interested in is whether you guys think if a
1200 dpi laser would be more than adequate for the 8/8
boards.


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I can make 6.66mil lines and spaces _just_ with my 600 DPI lexmark. But
the spaces will come out under and the lines above that, so it is better
to keep the lines slightly thinner than the spaces.

i didn't see the 600DPI laser to be the limit, it is under 2 mil
resolution. The problem of underetchning gets me before that, for example
a 3.33 mil line (i think) will no longer stay intact during etching while
it is fine on the toner.

Of course the edges will not be dead straight, but the transfer seems to
smooth them out a lot, and it isn't usually a problem for me.

so 6.66/6.66 is really pushing it, but it does work. for 0.5mm spacing
QFPs i use something close to 8/12 which works very reliable.


ST

On Tue, 25 Apr 2006 16:38:34 +0200, Kamal Shankar
<kbshankar2000@...> wrote:

>> I think you can do 8 mil., but I don't know how well
>
>> it will
>
>> transfer to the copper and how well it will hold up
>
>> during etching.
>
>
> My point exactly. Along your lines, I can print 5mil
>
> very well udinh my 600dpi laser, but it's badly
>
> smudged after the transfer.
>
>
> Would getting a 1200dpi help (perhaps the edges would
>
> be clearer) ?
>
>
>> The best I could get reliably was .012" 12 mil wide
>
>> traces. The
>
>> printing doesn't appear to be the problem as much as
>
>> the transfer
>
>> and etching of such small traces.
>
>
> The crucial point in TT is the paper. The paper will
>
> make or break the whole process. But even with good
>
> laser sheets, 8/8 has NEVER worked for me @ 600dpi
>
>
> Perhaps the edges were not that good.
>
>
> What I am interested in is whether you guys think if a
>
> 1200 dpi laser would be more than adequate for the 8/8
>
> boards.