Boards per Panel Arithmetic before Anyone Argues Unit Price
Calculate usable circuits per master production panel and subtract outer border clearances before negotiating bare board unit prices with fabricators.
V-Scoring Web Thickness
Panelization Geometry
Panelized circuit boards often use grooves cut from both sides to facilitate the separation of individual boards after the assembly process is complete. The v-scoring web thickness represents the remaining thin layer of board material left uncut between the opposing v-grooves in the center of the panel. This remaining material must be strong enough to hold the boards together during high speed pick and place and reflow soldering operations, yet thin enough to allow for clean and easy separation.
Fabricators measure and control this dimension to prevent premature panel breakage on the production line.
Mechanical Strength
Scoring blade alignment and cutting depth are critical to maintaining the target web dimension. When the v-scoring web thickness is too thin, the panel can sag or break as it passes through automated board loaders or reflow ovens. This sagging can cause components to misalign or fall off the board during assembly.
Conversely, if the web is too thick, operators may struggle to break the boards apart, which can lead to mechanical strain that cracks solder joints or damages surface-mount capacitors near the board edge.
Singulation Process
Standard tolerance limits for this dimension are typically within point zero five millimeters of the nominal target value. Quality inspectors verify this thickness using non-destructive mechanical gauges or by sectioning test boards. Maintaining this tight tolerance is necessary for high-volume automated production lines where panel singulation must be fast and consistent.
Mid Loss Laminates That Outrun Their Price Class
Mid-loss laminates paired with low-roughness copper foil match high-cost ultra-low-loss performance at a fraction of the raw panel price.