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Blue Solder Mask PCB

Blue Solder Mask PCB

    1.1 General description This is a type of mixed PCB built on 10mil RO4003C substrate and FR-4 combined for the application of SMS Gateway. It's 1.12 mm thick with 4 layers copper of 1oz weight each layer, white silkscreen on blue solder mask and immersion silver on pads. The base material is...