Accurately separating tiny pcb from workpiece. Singulation? Is that the word?

Engineer asked Jul 16,2022

I have a very small and thin PCB I am trying to design to work in a very small space. Essential trying to only solder a SOT-23 to another SMD chip, hoping to mount them on either side of a double layer board.

Since there willbe several of these small boards layed out on one workpice, I need a way of breaking each board away and still maintaining a good edge tolerance.

What's the smallest hole size I can practically have drilled to perform the perforations I would need? There will be a lot of these holes of course.

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