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June 2000

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From:
Brooks Bill <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Wed, 21 Jun 2000 08:27:26 -0700
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I recently did some research on this because we were trying it out for the
first time here...
The 'rule of thumb' I ran across is... 1/3 - 1/3 - 1/3. Meaning vscore depth
top and bottom is 1/3 the thickness of the board and 1/3 remains attached.
Most of the shops like to use a standard 30 deg cut, but it can be varied
+/- 10 deg depending on the needs of the designer. Also keep components at
least 100 mils back from the score line as depanelization tends to stress
the edge and can crack ceramic caps and such...
That's about all I have on the subject...
- Bill Brooks

Bill Brooks
Senior PCB Designer - [log in to unmask] <mailto:[log in to unmask]>

Zoneworx, Inc.
40925 County Center Drive, STE 200
Temecula, CA 92591
http://www.zoneworx.com    <http://www.zoneworx.com>
Tel: (909) 296-1226 x 1037
Co-Director / Education Officer / Webmaster
for the San Diego Chapter of the IPC Designers Council
http://www.ipc.org/SanDiego/index.html
<http://www.ipc.org/SanDiego/index.html>






-----Original Message-----
From: Ryan Jennens [mailto:[log in to unmask]]
Sent: Wednesday, June 21, 2000 8:07 AM
To: [log in to unmask]
Subject: [TN] V-score depth


Hey everyone-

        I was following the v-score discussion on Technet and I was
wondering if
someone could answer some questions.
        Is there a web thickness spec'd in the IPC specs somewhere?  Is
there a
thickness that some have just found to work from experience?  We can spec
v-score depth, but I would rather spec an IPC standard.  We have boards
coming in with varying v-score depths, and some cannot be removed easily.
Thanks.

-Ryan Jennens
TelGen Corporation
(517) 887-6666 x151

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