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      Quality

      Control items

      Control characters

      Standard

      Appearance control

      Board surface
      Finished aperture and attribute
      Thickness
      Trace width/spce
      Soldermask and legend
      Dimensions and related machining
      Surface treatment

      IPC-A-600G or customer-related technical indicators

      Physical testing

      Coating thickness and microsection
      (Cu in holes,copper chickness,Tin,Gold,Nickel thickness,etc)
      Thermal stress test
      Solderability test
      Voltage-resistance and Insulation test
      Characteristic impedance test

      IPC-TM-650 or IPC-6012
      Or customer standard

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