Automatic PCB depanelization — precise panel separation without stress
Depanelization is the stage of separating individual PCBs from the production panel. Automatic depanelization by CNC routing eliminates the risk of mechanical stress and solder microcracks that accompany manual breaking or V-groove. Precision in the order of 0.05 mm and repeatability regardless of board geometry.
Request a quote →What is depanelization and why does the method matter?
PCBs are produced in panels — several or a dozen identical circuits on one larger board, which streamlines SMT and THT assembly on the production line. After assembly, the panel must be separated into individual boards. The way we do it affects the quality of the final product.
Manual depanelization or breaking along perforation lines (V-groove) generates mechanical stress at the cut. For densely populated boards, components near the edge or BGA packages, this stress can lead to solder microcracks — defects invisible at first but surfacing as intermittent connections after months of use.
Automatic depanelization by CNC routing separates the panel without transferring stress to the board. The router follows a programmed trajectory with controlled speed and depth — no bending, no tension, no risk to edge components.
Depanelization methods and scope at Siltegro
CNC routing depanelization
Automatic depanelization on a CNC router — accuracy up to 0.05 mm, repeatability independent of the number of units in a batch. The primary method for most projects, especially where there are BGA, QFN components or elements near the edge.
Trajectory programming for a specific panel
The router trajectory is programmed individually for each panel layout — it accounts for board spacing, technology bridges and mounting holes. No restrictions on the shape of the boundary between boards — CNC routing does not require straight lines like V-groove.
Depanelization in large series
For series production, depanelization is built into the line schedule — the panel comes off the assembly line and goes directly to the CNC station, without interruptions in the production flow.
Quality control after depanelization
Visual and optical edge inspection after depanelization — no burrs, no thermal discoloration, laminate integrity preserved.
When is automatic depanelization essential?
Boards with BGA and QFN components near the edge
Mechanical stress during manual breaking can damage the solder joints of components with hidden leads. CNC routing eliminates this problem.
Medical and industrial projects requiring full traceability
Where every joint defect has consequences, stress-free depanelization is part of the quality strategy, not just production convenience.
Panels with irregular board shapes
CNC routing is not limited to straight lines — it handles complex contours, cut-outs and mounting holes requiring a precise trajectory.
Series production with high repeatability requirements
For large volumes, what matters is not only the quality of one board but repeatability across all units in a batch — CNC routing guarantees an identical result regardless of the board's position in the panel.
What sets us apart in depanelization?
Automatic depanelization as a standard, not a premium option
CNC routing is available for every production order — no additional negotiation or surcharge for a "higher standard".
One supplier for assembly and depanelization
The panel goes from the SMT/THT line directly to the CNC station on the same floor — no inter-operational logistics, no transport damage risk.
Trajectory programmed for a specific project
We do not use universal templates — every panel has a routing trajectory matched to its geometry.
Technical parameters
| Method | CNC routing (automatic depanelization) |
| Accuracy | up to 0.05 mm |
| Geometry restrictions | None — irregular shapes supported |
| Quality control | Visual and optical edge inspection |
| Line integration | Depanelization during series production |
| Contact time | 24 hours |
What to prepare for a depanelization request?
Panel design file
Gerber or technical drawing with the board layout on the panel
Board specification
Single board dimensions, component placement near the edge
Volume
Number of panels or boards in the order
Additional requirements
Dimensional tolerances, edge finish requirements