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PCB Multilayer PCB: Super thickness of copper: Max60z inner and outer layer Buried/Blind hole: 0.1mm(4mil) Through hole size: 0.1mm(4mils) Via hole size(laser drilling): 0.076mm(3mils) Aspect rations: 13:1 BGA: Φ0.5mm(20mils) Min line W/S: 0.075/0.075mm(3x3mils) Min thin core: 0.05mm(2mils) Min SMT pitch: 0.25mm(10mils) Impecance control: Single-ended 28Ω+/-7% Differential 90Ω+/-7% HDI: 3 + N + 3 Surface: Lead free HAL Immersion gold Flash gold Immersion Silver Immersion tin OSP STT(Selected Immersion Technology) Material: Getek Gil Halogen free material(including high Tg) Anti-CAF material High Tg anti-CAF material Special technology: Buried resistance Technology with step slot & step hole Application standed: IPC-6012 Class 2 PCB business: Prototype : you can order any quantity you want , the normal delivery date to leave our facility after ordering is : 2 layers : 4 w.d 4 layers :5 w.d 6-8 layers :7 w.d ( without blind/buried holes ) 10-12 layers : 12 w.d ( without blind/buried holes ) 14-18 layers : 18 w.d ( without blind/buried holes ) 20-22 layers : 25 w.d ( without blind/buried holes ) Models with blind/buried holes need 3 - 5days more.