Audit Custom Pad Geometry Across Copper, Mask, and Exported Data

A custom pad can begin as several drawing primitives and end as a specialized pad object. During that conversion, leftover regions or separately drawn mask shapes can become hard to distinguish from the intended feature. Review both object ownership and the manufactured geometry before releasing the footprint.

Altium’s custom pad documentation describes custom copper shapes and independently defined solder and paste mask shapes. Those capabilities allow detailed geometry, but each layer still needs its own review.

Establish the intended pad definition

Start from the component’s applicable land-pattern requirements and any approved assembly adjustments. Identify the electrical pin number, copper outline, mask opening, and paste pattern. Do not use the overall visual silhouette as a substitute for these separate definitions. Label the intended mask and paste exceptions explicitly.

Inspect the footprint’s object list after conversion. Look for original construction regions, duplicate copper, or loose mask objects left behind. Decide whether each remaining primitive has an intentional function and remove obsolete construction geometry from the release.

Test editing behavior

Move or rotate a copy of the footprint in a validation board. Check that copper and mask features move together and retain their relative positions. A loose primitive outside the component can remain behind even when the footprint itself looks correct in its library editor.

Inspect actual release outputs

Generate the formats intended for manufacturing and inspect the special pad in each relevant layer. Compare the resulting outlines and openings with the source geometry. A supported export format still requires verification of the specific feature and exporter configuration.

Check connectivity using the design’s electrical tools, especially if a large shape is assembled from several conductive objects. Physical overlap and intended net assignment should agree; a visually continuous shape should not conceal an unintended unassigned fragment.

Review fabrication and assembly constraints with the supplier when the shape contains narrow features or unusual paste regions. CAD acceptance alone does not establish that the feature will print, etch, or assemble as intended.

Preserve a small validation example with the library revision when the pad is reusable. That example should exercise placement, rotation, connectivity, and export, providing a practical way to detect regressions when the library or CAD version changes.