I read your request for design information on panel layout for V-scoring, and felt the need to respond.
Scored PWB's are indeed more efficient to produce and depanel than tab routed PWB's, but there are also drawbacks associated with this method.
The main drawbacks include, 1) Score lines weaken the panel, so if you have a large panel a/o heavy components, you may need stiffeners on the leading and trailing edges of each panel as they move through the process to avoid premature breakage along the score lines, 2) Pizza wheel cutters are inexpensive, but blades can be costly, 3) Depaneling is then limited to a manual or semiautomatic process, and 4) Whether the panels are hand broken or separated using pizza wheels, you can have major quality problems damaging solder joints and components.
Number 4 is by far the biggest drawback. Email me for more information and some documented horror stories.
If you have a very high volume application you may also want to consider sawing as your depaneling method. It is fully automated, eliminates scoring from the bare board supplier, requires little more bare board real estate than scoring, imparts virtually zero stress to the assemblies, and is much faster than tab routing, pizza cutting, or hand breaking.
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