手機布線要求BB/RF/layout Training Session Gary Hsu Bientec Typical PCB structure (1/3) 4 20 4 16 8 16 8 L1 L2 20 8 12 4 8 8 4 18 L3 12 Ln-2 24 5 12 Ln-1 Ln N>=8 24 18 12 Unit: mil 2 Bientec Typical PCB structure (2/3) Multi-Layer Structure 6 860um +/-10% Number of layers: Total thickness (measured on solder resist): Layer 1 copper thickness----------------------------------------------------0.7mil Epoxy 1 thickness (rcc)------------------------------------------------------2.0mil Layer 2 copper thickness----------------------------------------------------1.4mil Epoxy 2 thickness (Prepreg FR4)--------( 1080 x 2 ) ---------------5.5mil Layer 3 copper thickness----------------------------------------------------1.4mil Epoxy 3 thickness (Core FR4)----------------------------------------……