Flex plate for the PCB, the transition region is a rigid plate edge to the center to both sides of the lead-out area of a flexible, 3mm in the test range is defined (see figure below).
For hard and soft PCB, the transition area is a flexible area that is drawn from both sides centered on the edge of the rigid plate, with a test range limited to 3mm (see figure below).
For soft and hard PCB, the transition area refers to the flexible area led out from the rigid plate edge to both sides, and the inspection scope is limited to 3mm (see the figure below).<br>