In my past we routinely worked with our PWB suppliers to determine optimum panelization.  The 1" clear perimeter was an ideal condition, but there was a real minimum, less than 1" on each side and it depended on the design complexity.  Talk with all of your current suppliers and get their inputs.  

Dick Krug, CSSBB, CSMTPE
Senior Process Engineer
Sparton Complex Systems
30167 Power Line Road
Brooksville, FL  34602-8299
p (352) 540-4012  (Internal Ext. 2012)
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-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Jack Olson
Sent: Wednesday, October 31, 2012 10:27 AM
To: [log in to unmask]
Subject: [TN] FAB: panelization sanity check

Greetings,

This is a very basic question, but I'm trying to design a board size that will get the most yield out of a standard 12x18 fabrication panel. It's a 6-layer rectangle with nothing fancy (8/8, 12mil holes, ENIG), but we want routed (not v-scored in this case) and we want 6 boards per panel.

So I have always used the guideline of 1 inch clear all around the panel edge, (10 x 16 to working space), and 100mil between boards for routing, so I am looking at something like 4.95" x  5.26", right?

But in this case even 50mils extra would help me, so I'm wondering how much I can push the envelope and still have it manufacturable by ANY competent supplier.

Can two of the panel edges be less than 1 inch?

Do I have ANY wiggle room?

Jack (aka "the new guy")


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