pcb board double-sided fr4 custom proofing batch pcb circuit board production and processing manufacturers pcb circuit board

processing custom: yes item no: 047 brand: leabon model: 047 mechanical rigidity: rigidity number of layers: double-sided base material: copper insulation material: organic resin insulation layer thickness: conventional board flame retardant properties :vo board processing technology: electrolytic foil reinforcement material: glass fiber cloth base.syi