... phone keyboard with competitive price. 1. PI material, 1oz copper, board T0.2mm2. Immersion gold3. Application moblile phone keyboard ... Certificate: ROHS, UL, ISO9001-2000, ISO14001Our Manufacturing Capability for PCB Board1). Material type: CEM-3,FR-4,FR-4- ... requirements: Buried and blind vias, impedance control, thick Cu PCB,selectivity plating gold 30 microinch 18. Profiling: Punching, Routing, ...