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Altium usually pulls anular rings off plane layers, but IIRC all other layers retain that. I'd have to look to figure out how to get rings on plane layers; but I haven't had issues (yet) with it.
You can open gerber files in Altium. Usually I just double click the layer and it automatically opens in Altium. Or you can open while in Altium. But the CAMTASTIC viewer seems rather antiquated, as a warning.
Shawn Upton
Section Head, Test Engineering
Sensors Business Unit
Allegro MicroSystems, LLC
[log in to unmask]
603.626.2429/fax: 603.641.5336
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Technet Legg
Sent: Tuesday, December 09, 2014 9:16 AM
To: [log in to unmask]
Subject: [TN] annular rings on internal layers and check plots
On a multilayer power assembly, I've usually expected annular rings on all plated through hole layers. I've seen SEM images on more complex assemblies where this wasn't the case. Is it unnecessary?
Getting Altium to output a gerber plot for checking, with this copper included, seems to be an issue also. Is there a surefire way of generating scaled WYSIWYG documents?
RL
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