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Layer：20L (6R+8F+6R)
Min line width：0.15mm
Min space：0.15 mm
Min PTH ：0.45mm
Min distance between PTH and line：0.30 mm
Aspect ratio：6.7
Copper weight：outer≥48um, PTH≥30um
Board thickness： 3.00±0.30 mm
Finish: Immersion gold
Size：264 * 306mm
Impedance ：100ohm ± 10%
rigid-flex pcb with impedance
