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December 2001

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From:
Hinners Hans M Civ WRALC/LUGE <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Fri, 21 Dec 2001 14:07:05 -0500
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Hi Stacy,

First of all MERRY CHRISTMAS!

I am working on Panel Layout Standardization project.
We make memory (SIMM,DIMM,DDR,RIMM,SODIMM,CF, etc)
However, to better pursue the upper manager to see the
potential benefit from doing this, I have to make a
presentation in which all the ideas, objects, goals,
have to be presented clearly.

I have seen many, however, there are always more
upside and downside of the Panel Layout Standadization
that I have not seen.  I NEED YOUR HELP HERE.

1. Universally, I know the boardhouse use 18x24
rawstock size.  However, besides it, what else do they
use (Taiwan, Korean, Chinese, Ireland, and USA).

I wouldn't say there is a universal size for FR-4 - it depends on the board
size you are making.
My laminate guys start with a sheet 38" x 50" and cut that down depending on
what we order.
My last gig had 10 panel sizes on the books but only 5 were being used with
any frequency.
Don't misunderstand me, 18 x 24 is very popular - cost effective, easier
handling (less scrap from handling damage), & good for panelization.

2. However the X-Out affects the cost of making PCB?
(We want panel size are around of 12' - L x 7' - W in
which the maximum of PCB can possibly fit).

One impact to the fab house expense is whether the customer accept X-outs on
a PCB array.  Some customers required us to scrap an entire panel if one
board was bad.  <We're talking "Put your hand in the box" kinda pain.>

3. Screen Printing quality of those big panel vs.
smaller panel.

Now you are talking about registration issues.  I can't speak to the silk
screen side of it - Steve ya still out there!  I hear folks can run into
trouble with panel sag - 20 x 28 panel 62 mils thick.  For inner layer
registration the shop has to have it's artwork compensation factors dialed
in.

4. More!

Work with your board shop on the panelization including coupon locations -
there may be some best practices they use.

And for the holidays all I want are a few of gigs of RDRAM . . .

Hans
Integrity First  -  Service Before Self  -  Excellence in All We Do
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Hans M. Hinners
Electronics Engineer
Warner Robins - Air Logistics Center (WR-ALC/LUGE)
226 Cochran Street
Robins AFB GA 31098-1622

mailto:[log in to unmask]

Com: (478) 926 - 5224
Fax:   (478) 926 - 4911
DSN Prefix: 468




Please advise me.
Thanks!
Again Merry Christmas!!!

Stacy

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