Button Cu Plating manufacturing specification [FPCB D/S] 1. Layer : Double side FPCB + Partial PSR 2. Application : Sensor 3. Thickness : CON. 0.2 T 4. L/S : 125 micrometer/125 micrometer 5. Laser drill : 50 micrometer 6. Copper plating : Hole inner Min. 25 micrometer 7.Inspection spec :Not allowing damage on copper plating part 8. SPECIAL item for controlling : - Stair-shape at Copper plating neighboring area - Apply WET LAMINATION method
