Workpiece
🔔 Sapphire
🔔 Hole: D2.5×0.8mm
🔔 Required Roughness Ra < 200nm
Challenges
❌ Poor hole wall surface quality
❌ Polishing time too long for mass production
Benefits
✅ Hole wall roughness improved from by 85%, 293nm to 46nm
✅ No need for polishing