copper clad laminate pcb board: 1, KB base material 2,flash gold, 35um,2-layers ... and power supply PCB. We choose the best base material suppliers as our partners, such as KB and ... via holesMain base material:FR-1, FR-2, FR-4, CEM-1, CEM-3, High Frequency Laminate with various ... dielectric constant (imported or from local supplier), Aluminum base laminate, Metal core AluminumSurface Finish:Hot air Lev p ...