Issue link: https://iconnect007.uberflip.com/i/1538540
64 PCB007 MAGAZINE I AUGUST 2025 Polishing The principles of electrical contact can also be applied in a "polishing" function. This advanced feature ensures an exceptionally clean and precise routed surface, particularly when the depth routing is intended to expose a copper layer without caus- ing damage. The machine executes a depth-rout- ing operation. When the tool makes electrical con- tact with the target copper layer, the Z-axis move- ment halts automatically. The tool then advances slightly along the X- and/or Y-axis, lifts minimally in the Z-axis, continues to move in the X and/or Y axes, and subsequently lowers to re-establish elec- trical contact. This sequence repeats as part of the polishing operation. This iterative micro-movement ensures that the F i g u re 2 : D e pt h ro u t i n g u s i n g e l e ct r i c a l c o nt a ct w i t h t h e to p l aye r g ro u n d e d . ▼ F i g u re 3 . D e pt h ro u t i n g u s i n g e l e ct r i c a l c o nt a ct w i t h t h e i n n e r l aye r g ro u n d e d . ▼ machine is continuously "feeling" the copper surface. The result is a highly precise depth routing with minimal penetration into the copper, effectively "polishing" the surface by removing any remaining dielectric residue or micro-burrs, leading to a clean copper finish ready for subsequent processes. F i g u re s 4 a n d 5 : Po l i s h i n g s a m p l e s . ▼ D R I V I N G I N N OVAT I O N