Re: [Gumstix-users] EAGLE question

[Mosaic E. Inc. <gu...@mo...>]

At 01:07 PM 1/20/2007, you wrote:

Demetris--

This is easy in Eagle:

(The green coating you are talking about is called solder mask, or 
stop mask.)

Go into the layout editor; open up the Design Rules Check window; go 
to the "Masks" tab.  Notice the value labeled "Limit", which usually 
defaults to zero in Eagle.

Also, you'll see a sentence towards the bottom of the window, "Stop 
masks are generated for smds, pads and those vias that have a drill 
diameter that exceeds Limit."  This is the key:

If you set a nonzero "Limit", then for vias with drills smaller than 
the Limit, they'll be covered by (green) solder mask on your board; 
for holes larger than the "Limit" the mask will be set back from the 
edge of the holes according to the other values in the "Masks" tab.  
This is nice for mounting holes, for example, so that you don't get 
mask right up to the edges of the holes, where it can flake off, etc.

Hope this helps--

--Dave

(P.S. -- Tech support for Eagle here in the U.S. is very good, and in 
fact that is how I got this very question answered once upon a time... 
if you are outside the U.S., though, I'm not sure what you could do...)

(P.P.S. -- I've recently been reading in the archives on your progress 
interfacing a CMOS image sensor to the gumstix via DMA, etc., and 
hoping to ask you about it soon if you've got it working, since we are 
embarking on a similar thing soon.)

>Hi guys, i wanted to ask something about PCB design
> 
> 
>I want the "Green" coat on the PCB, ( i forgot the name for it) to 
>cover the VIAS and not to leave them bear naked. Do i have to tell 
>that to the PCB manufacturer or i can make that on Eagle ?
> 
> 
>Demetris Z.