Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, Stefan Trethan 
<stefan_trethan@g...> wrote:
> That is not what i meant Dave and you perfectly well know that...
> 
> Really, i thought about a pattern that allows more objective 
evaluation of 
> the
> result.
> if you have these wedges you can tell at which width they merge.
> 
> I tried to make such a pattern today, but didn't manage to find the 
right 
> software.
> it must be vector graphic i guess.
> 
> thank you very much for you very helpful answer Dave, but i am 
still 
> looking
> for other options...
> 
> ST4


OK, but I need to get such a thing anyway.

Back to your question.

On my CAD program, they had a triangle with one angle being the 
center and lines emminated from that point.  Each was exactly the 
same width.  I think the angles were 7.5 degrees so there were a lot 
of lines.

The idea was that it was a printer test.  Did the lines print with 
saw teeth in them.

Also, did the line seperate all the way to the point.

I'm not sure what program you are using to layout, but if you can 
place a series of round pads along a line so that the first has the 
edge touching the line and each following pad was 1 mil further away 
up to about 15 mis.

Ditto for lines.  lay out 15 lines, each 1 mil more apart then the 
last.

I would create a board and then shrink it to half size and try 
that .  If it came out perfect then your normal sized lines will be 
easy to make.


Dave






> 
> 
> >
> > Test pattern ?
> >
> > I have a simple 28 pin DIP and 28 pin SOIC with about 28 thru-
holes
> > that would be a good test.
> >
> > Make sure the holes are plated thru and could you electro-plate 
the
> > SOIC pad in gold ?
> >
> > Send it to me and I'll review your test.  : )
> >
> > Dave
> >