Dry film developing solution for printed circuit board and preparation method of dry film developing solution

Abstract

The invention relates to the technical field of chemical engineering, in particular to a dry film developing solution for a printed circuit board and a preparation method of the dry film developing solution. The dry film developing solution for the printed circuit board, provided by the invention, is mainly prepared from potassium carbonate, sodium carbonate, sodium hypochlorite and water. The dry film developing solution for the printed circuit board, provided by the invention, has the advantages of high stability and low corrosion; meanwhile, the developing property of minute patterns can be maintained and fine patterns can be displayed; besides, residues and bubbles on a dry film can be reduced, so that the display quality of the patterns is ensured. Furthermore, the dry film developing solution for the printed circuit board, provided by the invention, has the advantages that the condition that water soluble organic polymer salts remained on the dry film are hard to clean can be prevented, the production of water insoluble polymers also can be prevented, and environmental pollution is reduced; the dry film developing solution is a green and environment-friendly dry film developing solution.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a dry film developer for printed circuit boards and a preparation method thereof. Background technique [0002] With the development of the electronics industry in the direction of high speed and miniaturization, the requirements for assembly density are getting higher and higher. The pattern transfer process is an important link in the production of printed circuit boards. Since the dry film was put on the market, it has experienced the development process of solvent type, semi-water-soluble type and water-soluble type. At present, water-soluble dry film is generally used as the material for graphic transfer. The water-soluble dry film contains organic polymer compounds, and its main components are: film-forming resin, photopolymerizable monomer, photoinitiator, plasticizer, tackifier, thermal polymerization inhibitor, colorant and solvent. The principle of the dry ...

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Problems solved by technology

However, the above-mentioned developing solution will seriously affect the environment after being discharged, and a large number of bubbles are likely to be generated during the developing process, which will affect the display of patterns.

[0006] In addition, in the dry film development process, generally 500L of dry film developer can produce 1000 square meters of PCB boards, and each development line discharges 500L of developer once a day, and the developer belongs to high-concentration wastewater, and the treatment cost is high

In the prior art PCB developer management method, the developer wastewater needs to be discharged and treated every day. Due to the large amount of developer wastewater treatment, high concentration, and low treatment efficiency, the production cost is greatly increased.

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