V-scoring prepares a controlled separation line
V-scoring forms grooves in a PCB panel so individual boards can be separated along the intended lines. It is a panel and depaneling decision, not a way to create an electrical connector interface. Castellated half holes are plated edge features and should not be described as an alternative scoring method.
Straight score paths and the actual scoring equipment constrain the panel layout. Irregular outlines or obstructed paths may require routing, tabs or a different arrangement. Confirm the proposed geometry instead of assuming that every line drawn on the panel can be scored as requested.
Specify the finished panel requirements
Show score locations clearly on the approved panel drawing and define the relevant groove or residual-web requirements with the manufacturer. Overall thickness, material and the required handling stiffness influence the design. An unspecified “standard V-cut” can lead to a panel that behaves differently from what the assembler expects.
Check the relationship between score lines and the board outline, copper and components. Include any tolerance that matters to final fit. Do not transfer a groove dimension from a paper, plastic or unrelated machining example into a PCB production drawing.
Plan separation before placing sensitive components
- Identify the intended depaneling equipment and support.
- Review component and copper keepouts around the score line.
- Assess the effects of bending and separation force on the assembly.
- Confirm the acceptable finished edge and dimensional condition.
- Include inspection after separation where the risk requires it.
A board can pass electrical testing while still attached to a panel and be damaged during separation. Position mechanically sensitive components and connectors with the full handling process in mind. Avoid relying on uncontrolled hand flexing as the production method merely because a prototype can be snapped apart.
Validate the first panel and control changes
Review a representative panel through assembly and depaneling, with the acceptance checks relevant to the product. If the score or layout needs adjustment, update the panel drawing and evaluate whether tooling or assembly setup must also change.
For purchasing, distinguish board quantity, panel quantity, tooling and separation work. A quoted fabrication price may not include depaneling after assembly. Keep the agreed delivery format and edge requirements in the order so the customer, fabricator and assembler use the same definition of a finished board.