Well, I just downloaded a program called "KwickFit" which defaults to 18x24 with a .65 border (now I don't know why I was thinking 12x18? hmmm... gettin' old I guess) It also has suggestions for 21x24 and 21x27, not sure why it picks those, but not the 22x20 you mentioned Thanks for the responses, but the reason I don't want to work with a specific supplier is that we want this to be UNIVERSAL. We want anyone to be able to build it for the next 20 years. Assume we were trying to develop a company standard for a particular type of products, but we don't know who is going to build it. (by the way, KwickFit is a nice tool, easy to use, and free 30 day trial, no registration required) anyway, thanks gain, Jack . On Wed, Oct 31, 2012 at 10:29 AM, Stadem, Richard D. < [log in to unmask]> wrote: > Jack, there are standard flats sizes ranging all the way up to 22" by 20". > I know there are even larger sizes, but they are not "industry standard" > sizes, so to speak. > A good PWB fab house is very willing to help you with proper layout to > optimize the number of blanks that can be taken from a flat, as well as > depanelization schemes. Keep in mind you don't need to be tied into any one > depanelization method, but a combination can also work well. For example, > routings with a score line passing perpendicular through the end of the > routings. > > -----Original Message----- > From: TechNet [mailto:[log in to unmask]] On Behalf Of Jack Olson > Sent: Wednesday, October 31, 2012 9:27 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") > > ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________