I agree with Carrie. Even though we outsource all of our builds, we've
always done our panel design in house. We start a layout with the panel in
mind and how it will affect the PCB fabricators yield by learning what sizes
the eventual fab house uses. The panels are then designed with the array
being such as to best fit the wave or reflow equipment by taking our
assembly house's guidelines into account. Then, any bottom side passives
are placed in such a way as to maximize the wave, should one be used. Even
though our stuff is high mix, low volume, this takes a lot of guess work out
of the equation. We also let our assembly house review the placement before
we route. This done, we're able to design the board as Carrie suggests,
with the overhangs and breakouts or scoring where we want them, not where a
fabricator might arbitrarily place them. Like the Moonman says, DFM.
Bob Croslin
Nielsen Media Research
-----Original Message-----
From: Morse, Carrie [mailto:[log in to unmask]]
Sent: Monday, September 09, 2002 3:38 PM
To: [log in to unmask]
Subject: Re: [TN] Panelisation Software
Not sure if there is or not, but, I've been most successful in just drawing
them in where I want them. Of course, that decision is based on a number of
variables such as depanelizing equipment, overhanging components, and ease
of access to the tab. I have also found that a board fab house may not take
my drawing seriously and I have at times actually put a note on the panel
drawing stating "locate tabs as shown".
-Carrie
-----Original Message-----
From: d. terstegge [mailto:[log in to unmask]]
Sent: Monday, September 09, 2002 11:46 AM
To: [log in to unmask]
Subject: [TN] Panelisation Software
Hi Technet,
For most of our products we ask our boardvendors to choose suitable
positions for the break-away patterns. This is giving more problems then
I want, and as an alternative I am considering to ask our production
engineers to fully specify the design and positions of the break-away
patterns.
Currently we're using Kwickfit to specify our panelisations, but that
doesn't have the possibility to specify how the break-off patterns look
and where they should be positioned.
Is there, besides dedicated PCB-design software and general
CAD-software, any software on the market that can make such a detailed
specification of a board-panelisation ?
Best regards,
Daan Terstegge
Unclassified mail
Personal Website: http://www.smtinfo.net
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