The pcb board mainly refers to the 1100 Aluminum Sheet inlet board for printed circuit boards, with a thickness of 0.13 ~ 0.18mm±0.01mm. In the PCB industry, the application of circuit board drilling boards is very important. If there is a problem with the via process, the device cannot be fixed on the circuit board, which affects the use and the entire board cannot be used.
Now let's understand the main requirements for drilling pcb board?
1. The resin composition of the plate itself should not be too high, otherwise molten resin balls will be formed and stick to the hole wall. The higher the thermal conductivity, the faster the heating during the drilling process, the lower the temperature of the drill bit, and the better the annealing of the drill bit.
2. The aluminum inlet sheet with a certain surface hardness prevents burrs from drilling on the upper surface. However, wearing a diamond is not difficult.
3. When the drill bit is in contact with the drill bit, it must not only have a certain rigidity to prevent the vibration of the drilling machine, but also have a certain elasticity, so that the drill bit and the drill bit to be drilled are accurately aligned. If the surface of the bumper board is hard and slippery, the small diameter drill bit may slip out of its original hole and drill an oblique oval hole in the circuit board. There should be no impurities in the material, these impurities will uniformly create uneven soft and hard nodes, otherwise the drill will easily break.
The top plate used in China is mainly aluminum pcb board. The Quality Alloy Aluminum Sheet is used as the top plate for ordinary double-sided drilling, and the hardness is suitable to prevent burrs on the upper surface of the drilling. Since aluminum has good thermal conductivity, rigidity and elasticity, it has a certain heat dissipation effect on the drill.