Board-Stacking Fit for Tight Z-Height
At 0.40mm pitch and a 1mm mated stack height, this connector fits between closely spaced PCBs — think phone internals, wearable modules, or sensor boards where every tenth of a millimeter is accounted for.
What the 0.40mm Pitch and Gold Flash Mean for the Build
The 0.40mm pitch is the tightest constraint on the board layout — it dictates trace width and spacing for the escape routing between pads. At this density, the PCB fab capability and the solder paste stencil aperture need to match the pad geometry; a standard 0.5mm pitch board house may need a design review. For a one-time stack in a sealed device, this plating grade is cost-appropriate.
No last-time-buy clock is running.