Product Model: Multilayer Printed Circuit Board for GPS Module Applications Base Material: FR-4 Glass Epoxy Laminate Layer Count: 4-layer multilayer structure Appearance: Green solder mask with white silkscreen Finished Board Thickness: 1.0 mm Base Copper Weight: 1 oz (35 μm) Surface Finishing: Electroless Nickel Immersion Gold (ENIG) Minimum Line Width: 4 mil (0.1 mm) Minimum Line Spacing: 4 mil (0.1 mm) Special Process Features: Semi-plated hole (half-hole) structure Application: GPS module circuit control board