Re: V Cut for multiple layers PCB

Spehro Pefhany wrote:
On 10 Mar 2007 18:28:35 -0800, the renowned "kunil"
<kunilkuda@xxxxxxxxx> wrote:

Hi all,

I need second opinion about V Cut for multiple layers PCB.

I designed a 4-layers PCB, and want to buy 1 or 2 PCB panels from this
PCB manufacturer. The PCB manufacturer offered me a V Cut to separate
each copy of my design. They said it'd be cheaper since I could break
the V Cut with my own hand, rather than separate them using CNC drill.

In my opinion. breaking V Cut using my own hand could crack the image
layer / inner layer of the PCB. Am I right about this ? Or V Cut is OK
for separating multiple layers PCBs ?

Thank you for your help

Regards,
-kunil

I've had no problems with this, but usually the inner layers are power
planes and I keep traces and planes well away from the V-groove.


I agree. Inner layers on all my boards have a greater keepout to the edge then surface layers. My surface keepout from the edge is usually 50 mils minimum and inner layers are 75.

As to breaking them apart, it's ok if you take care. My experience is the same; I've had no problem breaking V-score boards apart by hand.

Cheers

PeteS
.

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