This is a new one for me.   It appears to me that the panel has already been cut almost all the way through based on the cross section photo. It also appears that whatever cut it, went right through both copper and internal  fiberglass and epoxy.  Only the very last fiberglass material left in the middle appears to be holding it together.

At 1.24 mil wide, I don't see how any rolling mechanical blade will fit into the chasm between the two sides of the cut.

Without knowing the specifics of how this was manufactured, it looks like it is ready to be broken off as is.
I guess the real answer is to get back to the person who prepared this for you and ask them how they expected you to separate the boards.

If that is not possible, then I think Dean nailed it on his first answer.  Use your sharpest knife and steadiest operator to carefully follow the score line guide already provided.  Don't press too hard and make cuts from both sides, if necessary.

Phil


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Stadem, Richard D.
Sent: Tuesday, December 31, 2013 8:23 AM
To: [log in to unmask]
Subject: Re: [TN] super fine score cuts

The caution with laser singulation is that the laser will carbonize the FR-4 along the edge. That is not a concern so long as the copper does not come out into that area.

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
Sent: Tuesday, December 31, 2013 9:00 AM
To: [log in to unmask]
Subject: Re: [TN] super fine score cuts

Morning Guy,

Wow! 1.24 mil score! I wonder how that was done? Laser? Water-jet?
Here's the pictures:

http://stevezeva.homestead.com/micro_v-score.jpg

http://stevezeva.homestead.com/panel_edge_230x.jpg

From the panel edge photo, it looks like there's no "V" relief to allow for any sort of real singulation in the conventional way that you use a V-score.

Best has a laser that can be used to de-panel something like this:

http://www.solder.net/services/laser-services/

Steve

-----Original Message-----
From: Guy Ramsey [mailto:[log in to unmask]]
Sent: Tuesday, December 31, 2013 6:31 AM
To: Steve Gregory; 'TechNet E-Mail Forum'
Subject: super fine score cuts

Hi Steve,
We have a 3 inch square panel of 144 little boards. They have the finest little score cuts I have ever seen.
Each one has a tiny embedded device. I am afraid to break them apart.
Wondering if you can post the pictures, and if you or anyone on Technet has a good idea for how to singlulate the boards.

Thanks,
Guy


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