External SSD Memory Module Memory Card PCB

Number of layers: 6
Plate: FR4 Tg170
Plate thickness: 1.0mm
Panel size: 138 * 103.6mm/8
Outer copper thickness: 35 μ M
Inner layer copper thickness: 30 μ M
Minimum through-hole: 0.20mm
Minimum BGA: 0.25mm
Line width and spacing: 3/3mil
Surface treatment: Chenjin 2 μ''