... copper, board T0.2mm 2. Immersion gold 3. Application moblile phone keyboard with competitive price. 1. PI material, 1oz copper, ... board T0.2mm2. Immersion gold3. Application moblile phone keyboard with competitive price5. Certificate: ROHS, UL, ISO9001-2000, ... CEM-3,FR-4,FR-4- TG170/TG180, Halogen Free,Rogers,Arlon,Taconic,Isola,PTFE, Bergquist 2). Surface Treatment: HASL,HASL ...