Leappcb/fr4 rigid pcb supplier

PCB manufacturer,pcb assembly
PCB layer:1-20 layer
Materials:CEM-1,CEM-3,FR4,Rogers,Taconic,Arlon,Nelco,Isola,Ventec,Aluminum base,Copper base,
Thickness:0.2-6.0MM
Min line width:4/4mil
Min finished hole size: Mechanical drilling 0.15mm; Laser drilling 0.1mm
Max finished copper thickness:6OZ
Surface treatment: OSP,HAL,Lead Free HASL,Immersion Gold,Immersion Silver,Immersion Tin,Flash Gold,Selective Gold,Gold Fingers.
Others:Impedance control,unbalanced stackup,Blind slots and metal edges,Peelable mask,Carbon ink, Capton tape,Counter sink