Yield Audit
Solder paste inspection records provide quantitative measurements of printed deposits across the circuit board substrate during surface mount technology fabrication. The gidepreport captures volumetric offsets and bridging frequencies on bare boards prior to component placement. Optical sensors sweep pad locations to compare measured solder height against nominal paste geometry.
Thickness variations exceeding fifty micrometres trigger automated line stoppages to prevent downstream bridging defects during reflow soldering.
Defect Correlation
Automated optical inspection systems link paste deposition errors to subsequent component tombstoning defects on dense printed circuit board assemblies. Solder volume deficiencies measured on fine pitch pads correlate directly with open joints found after convection reflow. Positional offsets recorded during paste printing predict bridging faults between adjacent pads before placement heads drop components into position.
Process engineers evaluate these trends to adjust stencil release parameters and squeegee pressure settings on the screen printer.
Acceptance Criteria
Quality control protocols establish maximum allowable area deviations for paste deposition before batches pass to component placement lines. Production managers review these metrics against IPC standards to determine whether stencil apertures require cleaning or replacement during high volume runs. Boards displaying excessive smearing fail verification checks and undergo chemical stripping before entering the assembly stream.
Final sentencing depends entirely on measured deposit geometry rather than visual appearance under low magnification.
