Environmentally-friendly weak alkaline low-temperature deburring softening solution, and preparation method and use method thereof

Abstract

The invention discloses a preparation method and a use method of environmentally-friendly weak alkaline low-temperature deburring softening solution. The environmentally-friendly weak alkaline low-temperature deburring softening solution comprises the components with weight percentages as follows: 10 to 35 percent of tetrahydrofuran, 10 to 35 percent of propylene glycol, 1 to 5 percent of alkyl phenol polyoxyethylene ether, 5 to 20 percent of ethanolamine, 1 to 10 percent of N-methyldiethanolamine and the balance of water. The environment-friendly weak alkaline low-temperature deburring softening solution provided by the invention has the advantages of low use temperature, good softening and flashing effect, no production of poisons and harmful gases, excellent deoiling effect, safety, environmental friendliness, adoption of formula substances completely satisfying of an environmentally-friendly requirement, product stability, simple process, energy conservation and high efficiency, and is convenient to use.

Description

technical field [0001] The invention relates to an environment-friendly weak alkaline low-temperature softening solution for deburring, in particular to a preparation method and a method for using the environment-friendly weak alkaline low-temperature softening solution for burrs in epoxy plastic packaging bodies. Background technique [0002] Electronic product components such as semiconductor packaging, PCB board printing, and passive components, before tinning, due to the good fluidity of small molecule epoxy resin in the process of chip plastic packaging, a layer will be formed on the surface of the substrate and pins unnecessarily. Resin film, commonly known as burr or flash. If this kind of flash is not treated, it will lead to poor appearance of the electroplating layer and copper leakage, which will affect the solderability of the product, and finally seriously affect the reliability of electronic components. Therefore, the deburring process is an important part of ...

AI Technical Summary

Problems solved by technology

[0004] At present, there are very few excellent environment-friendly weak alkaline low-temperature deburring softening fluids, which are only seen in a small amount of data reports in Europe, America and other countries, and there is no large-scale production and marketization.

The traditional domestic method generally uses inorganic acid or organic solvent to soak at high temperature. The main problem is that the operating temperature is high and the energy consumption is large; in addition, the reactivity of inorganic acid increases at high temperature, which will corrode the metal substrate and the surface of the plastic package. However, organic solvents are likely to cause discoloration of the plastic package at high temperatures, and are likely to cause problems such as burning. The safety factor of the operating environment is small, and general organic solvents are easy to volatilize at high temperatures, resulting in a large amount of odor. waste of energy

In addition, some enterprises adopt the process of electrolytic deburring, because expensive electrolytic deburring equipment is required, which adds huge economic pressure to small and medium-sized manufacturers. In addition, electrolytic deburring uses strong alkali electrolysis, which is also easy to damage the metal substrate. Corrosion