fr-4 double-sided anti-oxidation circuit board environmental protection conventional board fr4 double-sided multi-layer circuit board custom

processing custom: yes item no: 087 brand: leabon model: 087 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 insulation resin: epoxy resin (ep) product nature: seller marketing method: manufacturers straight.syi