Impedance Control PCB for Telecom

Specifications: Layers: 1 to 48 Board finished thickness: 0.21 to 7.0mm Materials: FR-4, CEM-1, CEM-3, high TG, FR4 halogen free,Rogers Maximum finished board size: 23 x 25mm (580 x 900mm) Minimum drilled hole size: 3 mils (0.075mm) Minimum line width: 3 mils (0.075mm) Minimum line spacing: 3 mils (0.075mm) Size: 243.4 x 244.43mm Surface finishing/treatment: HASL/HASL lead-free, HAL, chemicaltin, chemical gold, immersion silver/gold, OSP, gold plating Copper thickness: 0.5 to