Process Of PCB Multilayer Board Compression(5)

Process of PCB multilayer Board Compression (5)

5、Caul Plate

When a multilayer board is pressed, it is often stacked in many volumes between every opening in the press; and the bulk of the sheet to be pressed (such as 810 sets of slabs, each set of slabs / booklets) shall be separated by a flat, smooth and hard stainless steel plate, This type of mirror stainless steel plate is called Caul Plate or Separate Plate.At present, the commonly used ones are AISI 430 or AISI 630.