High precision dispensing technology and market prospect analysis

High precision dispensing technology and market prospect analysis

With the development of microelectronics technology, the complexity of integrated circuits is increasing, which requires the semiconductor package to have better electrical performance and higher reliability. Over the years, in order to reduce the size of electronic products, reduce production costs, to achieve high precision dispensing control performance has become the need for further development of the industry, which on the high performance of the dispensing process control requirements become more and more demanding.

In the dispensing process, with the remaining colloids in the syringe less and less, the volume of the gas in the syringe will be larger and larger. It also takes more time to compress the gas in the syringe when it is empty. Due to the difference in pressurization time, when the needle becomes empty, it will cause a significant change in the dispensing amount. Therefore, with the increase of the volume of gas in the syringe, the pressure time can be properly extended to compensate for the influence on the dispensing. In addition, dispensing compensation can also be carried out by vacuum suction method. In this way, a vacuum section can be formed between the piston and the liquid, and the gas in the syringe needs little time to be compressed. The vacuum suction method is widely used in FIP dispensing industry.

In the process of quantitative dispensing products, the most basic requirement is to maintain the same colloidal flow rate and dispensing effect throughout the dispensing process. However, because there are many factors affecting the quantitative accuracy of dispensing, including fluid viscosity, fluid temperature, the height and pressure of the liquid in the needle barrel, the inner diameter and length of the needle tip, the structure of the dispensing machine, the dispensing height and the size and shape of the dispensing point, so it is necessary to raise the quantitative accuracy of the high point glue through program control and mechanical control. And achieve the consistency of colloid flow rate and dispensing effect in the whole process.