A kind of active agent for lead-free solder paste and its preparation method and a kind of lead-free solder paste

Abstract

The invention discloses an active agent for lead-free solder paste, a preparation method of the active agent for the lead-free solder paste and the lead-free solder paste. The preparation method of the active agent for the lead-free solder paste comprises the steps that organic acid and organic halide particles are smashed into particles with the size smaller than 10 microns, and the particles are added to capsule wall material solutions to be fully emulsified and are made into microcapsule active particles as the active agent for the lead-free solder paste. The active agent for the lead-free solder paste is prepared based on the microcapsulary, the printing durability of the solder paste is greatly improved, and the room temperature storage time of the solder paste is prolonged. Compared with an existing solder paste active agent, through the segmentation activity releasing characteristic of the active agent, the solder paste is made to have better wettability, the use amount of the solder paste can be reduced, and the quantitative control over solder feeding and the solder paste wetting effect is achieved.

Description

technical field [0001] The invention relates to the field of soldering technology, in particular to an activator for lead-free solder paste, a preparation method thereof and a lead-free solder paste. Background technique [0002] In the current solder paste process, the most critical technology is to maintain the maximum activity of the solder paste without compromising other properties of the solder paste. However, the current solder paste generally suffers from increased activity, increased corrosion, reduced reliability, and residual color. In addition, the fluidity of the solder paste is enhanced, and the problem of increased solder balls is also generated. [0003] In the existing solder paste technology, the components used as active agents mainly include organic acids, organic acid salts, and organic halides. However, the activity of organic acids is too low, it is difficult to clean, and there is a peculiar smell when they evaporate, and organic acid salts are easy t...

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide an activator for lead-free solder paste and a preparation method thereof and a kind of lead-free solder paste, aiming to solve the problem of low activity of the current lead-free solder paste due to the activator. , the problem of intolerance to storage

Images