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Product：Six layer soft and hard impedance board
Layers: 6L
Structure: 2R+2F+2R
Plate thickness: 1.0mm
Outer copper thickness: 1 OZ
Inner copper thickness: 1 OZ
Minimum aperture: 0.3mm
Minimum line width/spacing: 3mil
Surface treatment: immersion gold
Product Usage: Highly Bluetooth Earphones
Process difficulty: strict impedance matching requirements
Structure: 2R+2F+2R
Plate thickness: 1.0mm
Outer copper thickness: 1 OZ
Inner copper thickness: 1 OZ
Minimum aperture: 0.3mm
Minimum line width/spacing: 3mil
Surface treatment: immersion gold
Product Usage: Highly Bluetooth Earphones
Process difficulty: strict impedance matching requirements
