... , ISO9001-2000, ISO14001Our Manufacturing Capability for PCB BoardMaterial type: Aluminum baseSurface Treatment: HASL,HASL lead-free,HAL, immersion gold,OSP ... ,immersion silver,immersion tin, peelable mask Board Size: 650mm*1000mmBoard Layer: 1L-4LBoard thickness: 0.8mm ... to 3 OZCopper thickness in hole: >20um Led COB aluminum print circuit board with immersion gold surface finish