Ed, When call out a V-Groove spec be sure spec material remaining not what
is removed. Also be sure that the v-grooves are perpendicular to each other
not off set. We typ spec for FR-4 .018-.024 and for MC-3 material .030 -
.040. This inf. for .062 thick boards. Also be careful using scoring
because at one time there were two different processes to do this. One was
to use a machine that really looked like a pizza cutter and all it did was
break the first two layers of glass and did not work well with FR-4
material. The second is actually cutting material away and this is referred
to as V-Grooving. Unfortunately the terms are used generically and one
needs to be careful if they are using a supplier that has one of these
older processes still in use.

Hope this is helpful. 
Steve Collins
PCB Design Supervisor
Antec

----------
> From: Ed Gavin <[log in to unmask]>
> To: [log in to unmask]
> Subject: FAB - Scoring PCB panels
> Date: Friday, May 02, 1997 8:04 AM
> 
> On 0.062 inch thick boards, we currently call for a 30 degree score,
> 0.020 inch deep on opposing sides of the board.
> We are trying to develop our standard for scoring.  Is this what most use
> for scoring?
> Do you score boards thicker than 0.062 and if so what dimensioning do
> you use for those?
> If given the choice would you select scoring over routing? why?
> 
> Thought this might be of general interest to the board community.
> 
>
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