PCB dictionary] Aspect ratio

The aspect ratio is expressed as two numbers separated by a colon (x:y). The values x and y do not represent actual widths and heights but, rather, the relationship between width and height. As an example, 8:5, 16:10 and 1.6:1 are three ways of representing the same aspect ratio.    

→ The aspect ratio of the PCB is the hole size for the depth of the drill.

PTH(Plated Through Hole) is calculated as X: Y and mainly uses 00: 1

In case of LVH (Laser Via Hole), X / Y x 100 = 00% is calculated as % for operator's convenience.

The aspect ratio is an important design value that determines the plating throwing power and it should be designed to the production capacity of the product in relation to the copper and sulfuric acid concentration of the electric equipment.

This page was modified April 03 2017