Re: gEDA-user: Clearing mask to mount shields

[Karel Kulhavy <clock@xxxxxxxxxxxxx>]

On Fri, May 05, 2006 at 11:58:38AM -0400, Darrell Harmon wrote:
> What is a good way to expose a ground plane for mounting a shield?

http://ronja.twibright.com/twister2/pcb.php

CL<
> I have a board which needs to be very well shielded, and am planning
> on making a machined aluminum plate with compartments for each 
> section of the circuit. The board will screw to this instead of
> standoffs. What is a good way to clear the soldermask in strips so
> that the aluminum can be in contact with the copper?
> 
> PCB won't let me convert a polygon to an element. It will not allow
> traces wider than 250 mils, so creating the pattern with traces is 
> not a good option. Is there any way to use one of the spare layers
> as a mask keepout layer? The only way I see right now to make it 
> work is to create several traces side by side in the larger areas.
> 
> -- 
> Darrell Harmon
> http://dlharmon.com