Double layer PCB5

1. Double layer health control PCB, FR4 Shengyi Material 1.0mm 
2. Green soldermask, White silkscreen
3. Immersion gold finish
4. Mini hole: 0.25mm
5. Mini Width and trace: 5MIL 
6. Prototype and mass production both
7. E-test for mass production and probeflying test for sample prototype orders.