13/10/2004 15:48:26, Bik Sidhu <[EMAIL PROTECTED]> 
wrote:

>My PCB design has a 24-pin QFN part which is oriented at 45 
degrees. When I
>generate the Gerber files through the Protel 99SE CAM manager, 
the footprint
>disappears on the copper layer but not on the solder mask or 
paste layers. 

You almost certainly have a zero thou track somewhere else in the 
design, on that layer. Protel, when it draws off-axis pads in 
gerbers, uses an 'appropriate' track, picked from ones it has 
already used. It picks zero thou, and fails to render the pad. 

Find that skinny track, and somehow avoid using it. (mine was part 
of a fiducial). 

Annoying, isn't it... (cost me an expensive set of PCBs, this bug, 
since the components that got left off were short-circuit shunt 
features, under BGA packages which were soldered down before 
we found the bug). 

Steve
 




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