Recently, China's ultra-precision cemented carbide micro-drills for PCB industry invisible champion enterprises, SZJZ Precision Tool Technology Group developed an ultra-fine micro-drill with a processing diameter of only 0.01mm, which broke the international monopoly of ultra-precision machining tools. , And it become the world's smallest drill.
As the electronic chip industry catches up with nano-level breakthroughs in advanced manufacturing processes, the corresponding printed circuit boards have also entered the micron era. The processing requirements for ultra-high-speed, multi-layer, ultra-precision, and multi-material circuit boards have also entered a period of fierce competition. The requirements for PCB ultra-precision micro-hole processing are also getting higher and higher, which is the key structure of printed circuit boards. , Mechanical drilling is the mainstream processing method of printed circuit board micro-holes, and precision micro-drills are the key tools for processing printed circuit board micro-holes.
According to the pore size, it can be divided into: small holes (1.00-3.00mm), sub-holes (0.40-1.00mm), ultra-small holes (0.10-0.40mm), micro-holes (0.01-0.10mm), sub-micropores (0.01- 0.001mm), ultra-micro hole (0.0001mm). At present, the laser can drill holes and achieve ultra-micro holes, but before the introduction of 0.01mm ultra-fine micro-drills, ultra-small hole drills were widely used.
However, with the ultra-large and sophisticated integrated circuits, there are more and more requirements for circuit boards, especially the rapid development of 5G, high-density interconnection boards (HDI), flexible circuit boards (FPC) and representative circuit boards with the highest technology The proportion of "IC carrier board" in printed boards is increasing year by year. This requires smaller and smaller holes in the plate, and the density is also increasing. This requires not only smaller drill bits, but also better performance.
Ten years ago, China could only produce micro-drills with a diameter of 0.1mm, and ultra-small and micro-hole drills could only be imported. Because they are consumables, high prices and restrictions greatly hinder the development of the domestic circuit board industry.
After 10 years of hard innovation, the R&D team has finally succeeded:
In the production of "0.01mm ultra-micro drill bits", the small helix angle and multi-section small-angle inclined surface transition structure design ensure the machinability and use performance of the micro drill; through the design of a special grinding wheel and a unique bracket structure, The implementation of stringent dynamic balance standards for grinding wheels, optimization of grinding parameters, and high-efficiency and high-precision machining of ultra-fine micro-drills are realized.
"In every three mobile phones in the world, one has used SZJZ ultra-micro drills in processing." It has become the only company in China that can produce 0.01mm extremely small drills. In 2019, SZJZ's The annual sales volume of PCB micro-drilling and milling cutters has reached 370 million, and the market share is close to the first in the world.