high precision double-sided circuit board multi-layer gold plate tin-sprayed plate 2 layers 4 layers 8 layers red oil gold finger

processing custom: yes item no: 111 brand name: lingbang model: 111 mechanical rigidity: rigidity number of layers: multiple layers 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