Hi Jack,

I've seen a board shop accept three quarters of an inch along two parallel
edges of the fab panel. They still needed an inch at the other edges for
their tooling holes, test coupons etc. Can't say that will work for every
shop though, but you would think 100mil is neither here nor there.

In fact panelize to the edges and get quotes. That'll tell you in double
quick time who will and who won't do it.

Cheers.........
 
Andy Kowalewski
+61 424 432 235



-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of Jack
Olson
Sent: Thursday, 1 November 2012 01:29
To: [log in to unmask]
Subject: [DC] 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 12 x 18 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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