Hi Ketan

 Most of our panelized boards are now v-scored. The first major advantage we
found was board stiffness, which is a big plus for us because of the high
density of our thin boards leaving very limited space for board supports
during screen printing and assembly. The added strength also prevents the
panels from being broken apart by material handlers and board assemblers.
 V-scoring is an advantage when it comes to the wave solder as well. With
the before mentioned added strength, there is also the bonus of getting rid
of the routed slots which prevents solder from migrating up and on top of
the board during wave soldering.
 Your pros and cons will vary depending on the panel thickness, board
density, how many boards you put in a panel and if these panels are going
through the wave.
 As for dimensioning of the v-score, I believe our board shop takes care of
it. Although I did look in to it at one time and found a good guide on the
AccuSystems Corporation web page. www.accusystemscorp.com They have what
they call the Pocket Guide to Excellent V-Scoring. It covers all of the
dimensions and gives a short summary on the different methods, advantages
and cost advantages.


Trevor Goddard,
SMT Supervisor
XLTEK
(905) 829-5300 x 348
[log in to unmask] <mailto:[log in to unmask]>




-----Original Message-----
From: Ketan Bhatt [mailto:[log in to unmask]]
Sent: Thursday, January 04, 2001 11:29 PM
To: [log in to unmask]
Subject: [TN] V-groove dimessions.


Hi TechNetters !!

We have  a requirements of making a panel of multiple PCBs (2 / 4 / 6) for
mounting efficiency. Our board size is typically 3" x 4" and 4" x 4".

What is the various methods of making panel w/o increasing the PCB cost ? PL
also mention the comparative advantages of using 'v' groove. And in case of
using 'V' groove, what should be the dimensions of the groove ?

Best regards,

Ketan Bhatt
Secure Meters Limited,
India.

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