I'm using the Molex 5569 library in CadSoft Eagle. When I create a polygon, it won't reach the pads at all. The problem occurs only with components from this library.
Have a look at this screenshot as well:
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\$\begingroup\$ I see a polygon, but it's not clear where it's supposed to be. In any case, just make your own library part. That's quicker than vetting someone else's, and you get exactly what you want. \$\endgroup\$– Olin LathropCommented Sep 12, 2014 at 12:14
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\$\begingroup\$ Have you specified the net name for the polygon pour? \$\endgroup\$– W5VOCommented Sep 12, 2014 at 12:43
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\$\begingroup\$ yes i did. In fact you see the polygon embraced the mosfet pins but it didn't do the same with the connectors even if they have the same name. I usually build libraries for stuff that still doesn't have a library in eagle. Otherwise i don't see the point of wasting time building a library when someone else already made it. (Mosfet and diode are from my library) \$\endgroup\$– user30148Commented Sep 12, 2014 at 13:33
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\$\begingroup\$ It's odd that the pour is forming a circle around square pads. I think there's something going on we can't see. Take the same screen shot with ALL the layers showing and post it with your question. That might help. \$\endgroup\$– Dan LaksCommented Sep 12, 2014 at 17:21
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\$\begingroup\$ Never mind, I figured it out. See my answer below. \$\endgroup\$– Dan LaksCommented Sep 12, 2014 at 17:35
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1 Answer
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I found the Molex 5569 library you're using. Whoever made this library did something very odd. For each square through-hole pad, they also added a co-centric hole on top of it. So there's a pad and a hole in the same spot for every pin. Eagle is programmed to isolate pours away from holes, which is why you're getting an isolation circle around each square pad. I can't think of a reason the author of this library would have done it that way. It's certainly not necessary to put a hole on top of a through-hole pad.
To fix this, open the Molex library and open the package that corresponds to the part you're using. If you want to be thorough, do this to every package in the library. Go to each pad and delete the hole that is co-centric with every single pad. You'll hardly notice the difference visually, but you can see it in the image below. The pad on the left has had the offending hole deleted. The pad on the right still has the hole.
As a last step, go back to your PCB layout and click Library->Update All. The pour should now engage each pad. In the example image below, I removed the hole from just the first pin and connected it to a pour.
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\$\begingroup\$ Would you mind posting the link to the library? I am using 5569 parts and wanted to compare my library to this one. \$\endgroup\$ Commented Jul 22, 2015 at 13:12