What is Backup Material
Backup material is a layer that is utilized during the fabrication process to prevent the formation of burrs and safeguard the drill table. It acts as a protective barrier between the drill bit and the drill table, effectively minimizing the occurrence of unwanted metal projections known as burrs. These burrs can potentially lead to short circuits or other issues if not properly managed.
There are several types of backup materials commonly employed in the PCB industry. Phenolic backup material, for instance, is known for its durability and resistance to heat. Paper composite backup material, on the other hand, consists of layers of paper impregnated with resin, providing reliable support and burr prevention. Additionally, aluminum foil-clad fiber composite backup material combines a layer of aluminum foil with a fiber composite material, offering excellent heat dissipation and protection against burrs.
The use of backup material ensures the overall quality and reliability of PCBs. By preventing the formation of burrs and protecting the drill table from damage, backup material helps maintain the integrity of drilled holes and safeguards against potential electrical issues. It plays a vital role in preserving the accuracy and precision of the drilling process, ultimately contributing to the overall functionality and performance of PCBs.