Panelization is needed when your PCB dimension is smaller than 50mmx100mm, or when your PCB is of any shapes (circular, or odd shape) other than rectangle, your boards must be panelized in an array for fabrication. You can pre-panelize at your side, or we can also panelize for you. In the latter case, we will send the panelization file back to you for your approval before fabrication begins. Panelization is a MUST if your PCBs will use surface mounting machines for assembly.