Spatial Resolution

Measurement Accuracy

Calibration procedures verify the performance of cameras by imaging standardized grids of known dimensions. Engineers calculate the ratio of the physical area to the pixel count to establish the actual size of one unit. Systems operating at a higher magnification provide better discrimination of pads and apertures during the verification of bare boards.

Constant monitoring of these values guards against drift in the mechanical focus or vibration within the factory floor environment. Stability of this metric ensures consistent pass or fail decisions across multiple production runs.

Fabrication Tolerance

Physical density of the photoresist exposure defines the outer limits of circuit complexity. Designers specify this resolution to ensure the copper etch process produces geometries that match the original schematic data. Small errors in the alignment or the light intensity lead to unwanted variations in trace width or gaps that remain below the threshold of reliable detection.

Proper control of the exposure light wavelength directly dictates the minimum feature size achievable on any layer of the assembly. Manufacturers align their output capabilities with these constraints to produce stable and functional interconnects.