Welding smoke generator, welding production line and processing technology including the generator

Abstract

Provided is a welding-aid aerosol generator, a welding production line with the welding-aid aerosol generator and a processing technology. The invention provides the welding-aid aerosol generator, the welding production line with the welding-aid aerosol generator and the processing technology. The welding-aid aerosol generator comprises a gas source, a liquid soldering flux tank, an atomization spray head and a heating device which are sequentially connected. The heating device comprises a shell and a heat source arranged in the shell. The atomization spray head is arranged on the upper portion of the shell, and an outlet of the atomization spray head is inward. According to the welding-aid aerosol generator, the welding production line with the welding-aid aerosol generator and the processing technology, liquid soldering flux is conveyed out of the liquid tank through the gas source and is sprayed to a heating bin in the form of mist after being treated by the atomization spray head, the soldering flux is heated by a heating pipe, and the misty soldering flux is changed into smog; and the smog mobility is large, particles are small, the smog is in full and uniform contact with solder conveniently, the number of residues on the surfaces of welded devices is very small, is less than or equal to 1 / 1,000 and is negligible, secondary pollution to products during cleaning in the following cleaning process in a traditional technology is avoided, the production cost is lowered, the yield is increased, no waste liquid is drained, and the environment is protected.

Description

technical field [0001] The invention relates to the technical field of semiconductor component processing, in particular to a fluxing smoke generator, a welding production line including the generator and a processing technology. Background technique [0002] In the welding process of electronic components, tunnel furnaces heated by radiation or flat plate welding equipment heated by contact are generally used. When soldering, most of them use liquid flux or solder paste containing rosin resin flux composed of halide-containing active agents, additives and organic solvents. The liquid flux or solder paste is in direct contact with the chip, and passes through the high temperature of the welding environment (tunnel Radiation heating of type welding furnace or contact heating of flat welding furnace) to complete welding. Although this type of flux has good solderability and low cost, the residual impurities are as high as 2% to 4%. In particular, the halogen ions inside the r...

AI Technical Summary

Problems solved by technology

Although this type of flux has good solderability and low cost, the residual impurities are as high as 2% to 4%. In particular, the halogen ions inside the residue become an important factor affecting the reliability of electronic components, and often need to be cleaned by special cleaning equipment. Chemical solvent cleaning is used to remove the residues of impurities generated during the welding process. In addition to increasing production costs and causing environmental pollution factors, it will also cause uncontrollable secondary pollution and damage to the electronic components themselves.

And the use of imported low-residue no-clean flux, the high cost caused by the impact of technical barriers also limits the use

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