What is Aspect Ratio in PCB?

Aspect Ratio is calculated by dividing the maximum board thickness with the smallest drilled hole diameter size specified for that board design. Maximum board thickness is the PCB thickness without copper plating, solder or solder mask. The aspect will affect the difficulty of plating. The bigger the aspect ratio is, the harder the plating process will be.
We Hopetimepcb can build the board with aspect ratio listed in Table 13 below:
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