On Mon, Apr 03, 2006 at 09:08:46AM -0400, DJ Delorie wrote:
>
> > I wouldn't do this. It just takes off unnecessary copper. If you have
> > something squeezing in from the other side you might be happy for the
> > extra bit of copper.
>
> I was thinking of 0.5mm pitch TQFPs for example. The tria
> I wouldn't do this. It just takes off unnecessary copper. If you have
> something squeezing in from the other side you might be happy for the
> extra bit of copper.
I was thinking of 0.5mm pitch TQFPs for example. The triangles are on
the order of a mil or so each, and reducing 144 clears to o
On Sun, Apr 02, 2006 at 09:03:28PM -0400, DJ Delorie wrote:
>
> > Why?
>
> It may keep a polygon island from getting disconnected or necking down
> below DRC parameters. It may allow for an extra trace between pins.
> If the pin is intersected by a 45 degree line, it prevents notches
> from bein
On Sun, Apr 02, 2006 at 01:28:06PM -0400, DJ Delorie wrote:
>
> I tried implementing this once, but it slowed down PCB a lot. In my
> case, it was square pads, and I was trying to squeeze another trace
> out through the corner. I think I decided to just go with rounded
> pads instead.
>
> Note
Thanx a lot for the information!
Em Dom 02 Abr 2006 22:03, DJ Delorie escreveu:
> > Why?
>
> It may keep a polygon island from getting disconnected or necking down
> below DRC parameters. It may allow for an extra trace between pins.
> If the pin is intersected by a 45 degree line, it prevents n
> Why?
It may keep a polygon island from getting disconnected or necking down
below DRC parameters. It may allow for an extra trace between pins.
If the pin is intersected by a 45 degree line, it prevents notches
from being cut out of the clearance:
http://www.delorie.com/pcb/notches.html
It d
Em Dom 02 Abr 2006 17:01, DJ Delorie escreveu:
> > Karel if you have to have a square pad w/ round corners you can
> > always draw it ... just as for oblong pads by using a line, or four
> > lines with whatever corner radius you want. Turn it into a
> > footprint and you're done.
>
> No, he wants
> Karel if you have to have a square pad w/ round corners you can
> always draw it ... just as for oblong pads by using a line, or four
> lines with whatever corner radius you want. Turn it into a
> footprint and you're done.
No, he wants a square pad with square corners to have a CLEARANCE with
Karel Kulhavy <[EMAIL PROTECTED]> wrote:
> I suggest the copper cutout (clearance) around a square pin would be
> done as a square with rounded corners. I. e. growing the shape of
Karel if you have to have a square pad w/ round corners you can always draw it
... just as for oblong pads by using
I tried implementing this once, but it slowed down PCB a lot. In my
case, it was square pads, and I was trying to squeeze another trace
out through the corner. I think I decided to just go with rounded
pads instead.
Note that this kind of slowdown would be even worse with layouts with
lots of p
I suggest the copper cutout (clearance) around a square pin would be
done as a square with rounded corners. I. e. growing the shape of the
rectangle by the clearance. Now it's made as a sharp rectangle.
For example if you have a square pin which is completely included in
(obscured, overlapped by)
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