Master V-score, tab routing & mouse bites. Save 40–60% on manufacturing and assembly costs with proper panel design.
Get Panelization QuoteThe key to cost-effective manufacturing and assembly
PCB panelization is the process of arranging multiple individual PCB designs onto a single larger board (panel) for manufacturing and automated assembly. Instead of processing each board separately — with individual setups, stencil prints, and pick-and-place cycles — panelization allows dozens or hundreds of boards to be fabricated and assembled simultaneously.
Panelization is essential for two reasons: cost reduction and assembly efficiency. Manufacturing a panel of 20 boards costs only slightly more than manufacturing a single board, reducing per-board costs by 40–60%. For SMT assembly, panels enable high-speed automated placement, drastically reducing assembly time and cost per board.
After fabrication and assembly, individual boards are separated from the panel using one of several methods: V-scoring, tab routing, or a combination of both. The choice of separation method depends on your board outline, component placement, and production volume.
Choosing the right method for your design
| Method | Best For | Pros | Cons |
|---|---|---|---|
| V-Score | Rectangular boards, high volume | Fastest, cheapest, cleanest edge. Minimal waste. | Only straight cuts. 1/3 board thickness removed per side. Can't route around components. |
| Tab Routing | Complex outlines, mixed shapes | Supports any board outline. Components can overhang edges. | Slower, more expensive. Tabs leave small nubs on board edge. |
| Mouse Bites | Small boards, prototyping | Easy separation, no special tools needed. Good for hand assembly. | Weaker connection. May leave rough edges. Not ideal for high-speed assembly. |
| V-Score + Tab | Mixed designs, optimal cost | Combines cost savings of V-score with flexibility of tab routing. | More complex panel design. Requires careful planning. |
Design rules for successful panelization
Add 5mm edge rails on all sides for conveyor handling. Include 3–4 tooling holes (3.2mm diameter) for alignment during assembly.
V-score depth = 1/3 of board thickness per side. Keep components 5mm+ away from score lines. Minimum board length for V-score: 25mm.
Use 2–4 tabs per board edge. Tab width: 2–4mm for standard boards. Mouse bite holes: 0.5mm diameter, 0.75mm pitch.
Keep tall components (connectors, transformers) away from panel edges and score lines. Consider component weight for panel strength.
Add 2–3 panel fiducials (1mm copper, 2mm keepout) for SMT alignment. Place at corners for best accuracy across the panel.
Optimize board count within panel dimensions. Leave 2–3mm between boards for routing. Consider board orientation for best copper balance.
Real-world cost comparison: individual vs. panelized
| Scenario | Individual Boards | Panelized (20-up) | Savings |
|---|---|---|---|
| PCB Fabrication 50×50mm, 2-layer, 1.6mm |
$3.00/pc × 200 = $600 | $0.80/pc × 200 = $160 | 73% |
| SMT Assembly 50 components, standard parts |
$8.00/pc × 200 = $1,600 | $2.50/pc × 200 = $500 | 69% |
| Stencil Cost | $5.00 × 1 = $5 | $15.00 × 1 = $15 | -$10 |
| Total (200 boards) | $2,205 | $675 | $1,530 (70%) |
* Actual savings depend on board size, component count, and assembly complexity. Contact us for a detailed quote.
Expert panel design for optimal cost and quality
We analyze your board outline, component placement, and production requirements to recommend the optimal panelization method.
Our engineers create the panel array with edge rails, tooling holes, fiducials, and separation features (V-score/tabs).
We verify clearances, tab strength, V-score depth, and component clearances. You approve the panel design before manufacturing.
Full panel fabrication, assembly, and testing. Individual boards separated (or shipped as panels per your preference).
Expert answers about PCB panelization
PCB panelization is the process of combining multiple individual PCB designs onto a single larger board (panel) for manufacturing and assembly. This allows multiple boards to be processed simultaneously through automated SMT assembly lines, significantly reducing per-board costs and improving production efficiency.
V-score uses a V-shaped groove cut partially through the board (typically 1/3 from each side), allowing boards to be snapped apart along straight lines. Tab routing uses small tabs (mouse bites) with drilled holes to connect boards to the panel frame, allowing separation by breaking the tabs. V-score is faster and cheaper but only works with straight cuts; tab routing supports complex board outlines.
Panelization can save 40–60% on manufacturing costs compared to ordering individual boards. The savings come from: (1) reduced setup/panelization fees per board, (2) lower per-board pricing at higher quantities, (3) faster assembly throughput on SMT lines, and (4) reduced handling and shipping costs.
The optimal panel size depends on your SMT assembly line capabilities. Most manufacturers support panel sizes up to 250×330mm (10×13 inches). We recommend designing panels to maximize board count while leaving adequate edge rails (5mm minimum) for conveyor handling and tooling holes for alignment.
Yes, this is called a 'mixed panel' or 'multi-design panel.' You can place different board designs on the same panel as long as they share the same board thickness and copper weight. This is ideal when you need small quantities of multiple designs. Additional charges may apply for multi-design panelization.
Our engineers will optimize your panel design for maximum cost savings and assembly efficiency.