It's pretty simple. They are proposing a nominal courtyard excess of
0.25mm for all THT components. All in all, I would amend rule 6.6 to
the following, breaking it down into two rules:
- Courtyard line has a width 0.05mm. This line is placed so that its
clearance is measured from its center to the edges of pads and body.
- Courtyard clearance is 0.25mm, except for components smaller than
0603 at 0.15mm, aluminum capacitors and connectors at 0.5mm and BGA at
1.0mm, all rounded on a grid of 0.05mm. (IPC-7251, IPC-7351)
The connector clearance comes from /PCB Design Optimization starts in
the CAD library/. Any comments before I edit the KLC?
On Wed, Jan 14, 2015 at 8:22 PM, Carl Poirier
<carl.poirier.2@xxxxxxxxx <mailto:carl.poirier.2@xxxxxxxxx>> wrote:
Thank you very much Lorenzo. I will come up with some adjustments
to the KLC.
On Tue, Jan 13, 2015 at 2:26 AM, Lorenzo Marcantonio
<l.marcantonio@xxxxxxxxxxxx <mailto:l.marcantonio@xxxxxxxxxxxx>>
wrote:
On Mon, Jan 12, 2015 at 09:39:44PM -0500, Jean-Paul Louis wrote:
> > Thanks for the information. I have looked at some videos.
Are you aware of some guidelines for THT courtyards?
Here you go for THT:
http://www.ipc.org/committee/drafts/1-13_d_7251WD1.pdf
(yes, eternal draft:D)
--
Lorenzo Marcantonio
Logos Srl
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