Using Cadsoft's Eagle.

Last time I had a prototype board made at Olimex, I tried to use a 
polygon to make a ground plane.  Unfortunately, the ground plane wasn't 
solid, but rather a bunch of individual traces (8-10 mils?) that looked 
similar to this:

|-------------------------|
|-------------------------|
|-------------------------|
|-------------------------|
|-------------------------|
|-------------------------|
|-------------------------|
|-------------------------|

Fill mode was set to solid, not hatch.

After a few minor layout tweaks, I made new Gerbers and had Advanced 
Circuits make some boards.  The ground plane turned out fine despite the 
fact that I didn't do anything different to the polygon. 

I also noticed on the Olimix board that my traces were all smaller than 
I'd drawn.  I believe I had some 12 and 16 mil traces and they all ended 
up being the same size and smaller (8-10 mils? - like the 'ground 
plane'), but the boards from Advanced Circuits distinctly had two 
different size of traces.

I looked at the gerbers sent to Olimex in GCPrevue and didn't see any 
issues. (ground plane appeared solid, etc.)

Don't get me wrong, the boards from Olimex worked fine and are/were a 
good value.  They just weren't what I expected.

Now I have another board I am working on that I would like to send to 
Olimex, but I want to make sure I get a solid ground plane and my traces 
end up being the proper size.  Any suggestions on things to look for 
that I may have done wrong?

Aaron

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