Hi Bill-
Our typical board is not so big. We try to use one of two 'Array' sizes
here in the US (where an Array contains multiple boards, a manufacturing
panel contains multiple arrays).
Our sizes are:
284x208 MM - 4 arrays per panel, x pcbs per array
284x138 MM - 6 arrays per panel, x pcbs per array
Usually, we can pattern the PCB to get a good yield in one or the other
width. In rare cases, we shorten the length and get one more array (rotated
90 deg.) on the panel. Usually, we'll leave dead board in the array to get
the standard length, because we save no money by shortening unless we can
go down to about 210x138.
We got to this by assuming the mfg panel is 18x24 inches. We source very
few boards in the US these days, and it may be true that overseas they have
the 'super-euro' and other unique sheet sizes available as a starting
point, but we still seem to get optimal pricing with these two sizes.
Best Wishes,
-Chris
"Brooks,Bill"
<[log in to unmask]> To: [log in to unmask]
Sent by: DesignerCouncil cc:
<[log in to unmask]> Subject: [DC] Standard panel
size?...
07/28/2005 06:47 PM
Please respond to
"(Designers Council
Forum)"; Please respond to
"Brooks,Bill"
We are re-evaluating our board assembly panel sizes and want to get the
best
yields from our vendor's manufacturing panels when we select the final size
of our 'standard' assembly panel...
What is your PCB manufacturing 'standard' panel size for glass/epoxy type
materials??? Some PCB vendors tell me they have a working panel size of
18x24 inches... what do you use? And why?
Thanks in advance for your help...
Bill Brooks - KG6VVP
PCB Design Engineer, C.I.D.+, C.I.I.
Tel: (760)597-1500 Ext 3772 Fax: (760)597-1510
Datron World Communications, Inc.
_______________________________________
San Diego Chapter of the IPC Designers Council
Communications Officer, Web Manager
http://dcchapters.ipc.org/SanDiego/
http://pcbwizards.com
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