melamine entry and backup board Advantages:
1. It is a composite of the Melamine paper and wooden fiber board with high density. It is especially made to replace the Phenolic backup board.
2. It is difficult to distort. The warping degree is smaller than the Phenolic paper backup board.
3. It reduces the abrasion of the drill and lengthens the life of micro drill bits.
4. It can save the cost and it has more sizes.
5. It doesn’t pollute the environment.
Drilling in PCB production is indispensable process and it can't be avoided for either electro-connection among layers or fixing elements.
The formation of pcb drilling burrs affects the PCB quality and ends up in deburring processes. The burrs created from drilling processes is onerous to get rid of and also the price of deburring is often substantial.
step-down of burr occurred in drilling method will scale back effort and time to get rid of burr. so the opening drilling and deburr method square measure thought-about as necessary processes to save lots of energy.
Since burr formation is powerfully associated with method conditions and drill pure mathematics, experiments were dole out to develop a Drilling Burr management Chart by variable feed, spindle speed and drill diameter and backup board material.
it tested that choose high density and hardness backupboard may be a sensible approaches to attenuate drilling burrs and to green the PCB drilling method.