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Subject: Pad_Designer/Allegro PCB: Trouble Suppressing Unconnected Pads
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brianh
Posts: 1
Online: User is Offline
12/01/2004 9:29 AM  
In Pad_Designer I have selected ""Optional"" in the ""Internal Layers"" section of the ""Parameters"" tab. Using this padstack in a design I selected the ""Suppress unconncted pads"" option in the ""Film Control"" tab of the Artwork Control Form and created the artwork. Importing the resulting artwork into a new PCB shows that the unconnected pads weren't suppressed on the internal layers. Any ideas? BTW, I'm using ver 15.2.

Thanks,

brian
Padmin
Posts: 0
Online: User is Offline
12/01/2004 11:57 AM  
I'm using 15.2-51AV and it is working properly.

Are you using positive or negative layers and are you generating 6x or RS274X artwork? Have you looked at SourceLink solution 1805526 ?
brianh
Posts: 1
Online: User is Offline
12/02/2004 6:49 AM  
I'm using 15.2-51AV and it is working properly.

Are you using positive or negative layers and are you generating 6x or RS274X artwork? Have you looked at SourceLink solution 1805526 ?
Padmin
Posts: 0
Online: User is Offline
12/02/2004 8:23 AM  
Make sure your layer stackup under Setup > Cross-section is set to Positive and artwork plot mode is set to Positive for the particular film record. If you are attempting to suppress unused pads on outer layers, that will not work; you can only suppress unused pads on inner layers.

You do have to have current support to access SourceLink and this forum too. I'd suggest contacting Cadence to determine if your support contract has expired or if there are Soucelink problems.

Anyway, the SL solution showed:

Editing the film record showed that 2 entries for the PIN subclass were included in the film. Only one PIN and one VIA subclass should be in any etch film record. Changing this corrected the suppression problem.


In the 15.2 release, you cannot create 2 entries so this solution may or may not be helpful for you. Good luck!
brianh
Posts: 1
Online: User is Offline
12/02/2004 11:07 AM  
Got it! As usual, the fault was mine. I didn't realize that each individual record in the Artwork Control Form could have different settings (seems obvious now that it is absolutely necessary). Thank you, Padmin for the words ""the particular film record"" that started me thinking along those lines.

Thanks again,

brian
Padmin
Posts: 0
Online: User is Offline
12/02/2004 11:17 AM  
Glad to have helped. I appreciate you letting us know the final answer to the problem. Sometimes threads just die with no definite answer. Thanks!
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Forums > Silicon-package-board > PCB Design > Pad_Designer/Allegro PCB: Trouble Suppressing Unconnected Pads


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