I want to create a large pad that covers several component and IC pads on the bottom of my board. I believe the only difference between a polygon and overlapping rectangles is the polygon may change size for routing. Other than that, what are the differences?
Why do polygons have "width" as a wire does? For example, if you draw a polygon from 1.0, 1.0 to 2.0, 2.0, and the width is 0.1, then the polygon extends outside of that square by 0.05. If you do the same thing with a rectangle, there is no width. In order to keep the polygon extension outside of the area I want, I've made the width small, but now it violates the width rules for the wire on that net.
Then, after routing, my polygon no longer has complete coverage on the area I've selected. I suspect this is because the router removed some of the polygon. Is this part of my first question? Should I use a rectangle instead so the router doesn't trim my polygon?
Still have lots to learn, but picking this up pretty quickly.
Thanks for the help!
Dave