Water-based anti-rust surface cleaning agent of flexible circuit board

Abstract

The invention discloses a water-based anti-rust surface cleaning agent of a flexible circuit board. The water-based anti-rust surface cleaning agent of the flexible circuit board is prepared from thefollowing components in percentage by mass: 1 to 5 percent of alkyl sodium sulfonate, 10 to 20 percent of an ether solvent, 0.05 to 0.5 percent of a nonionic surfactant, 1 to 5 percent of EDTA, 0.2 to0.6 percent of an anti-rust agent, 0.2 to 0.6 percent of a copper corrosion inhibitor, 0.2 to 2 percent of a preservative, 10 to 20 percent of a ketone solvent and the balance of deionized water. Thewater-based anti-rust surface cleaning agent of the flexible circuit board, which is provided by the invention, does not have toxicity, waste liquid is pure and easy to treat, and damage to electricapparatus components is avoided; polar bromine salt can be removed and rosin can be dissolved and removed; and through detection, the circuit board cleaned by the cleaning agent does not have residuesand white points and does not have other polar pollutants such as bromine salt, and the cleaning cleanliness reaches 96 percent or above and far exceeds the national standard (90 percent).

Description

technical field [0001] The invention relates to the field of chemical decontamination, in particular to a water-based anti-rust surface cleaning agent for flexible circuit boards. Background technique [0002] Circuit board cleaning is a technology that uses a cleaning agent to be placed in an ultrasonic container to perform physical-chemical treatment on its surface. According to the circuit board printing production process, generally include the following three types of residues: one is particulate pollutants, such as dust, lint and solder balls. In particular, solder balls are a soldering defect that can cause electrical shorts if vibrations from the equipment cause a large number of small solder balls to collect on one spot. The second category is non-polar pollutants, such as flux, rosin, organic resins, organic acids, organic salts and paraffin, etc.; the third category is polar pollutants, including halides, acids and salts formed by them. [0003] If the above-men...

AI Technical Summary

Problems solved by technology

[0003] If the above-mentioned pollutants are not cleaned up, it will bring the following problems to the circuit board: 1. Dust, etc. will easily cause poor contact of the circuit, and the long-term accumulation will be activated and charged with static electricity, and it is easy to further absorb particles and dust in the air during use; 2. , Particles, solder balls and polar dirt form a medium that will break down the capacitor, short circuit the circuit, and even cause electrical corrosion to some crystal oscillator components

[0004] The cleaning effect of the circuit board cleaning agent in the prior art is poor, more polar pollutants cannot be cleaned, and the use of toxic, volatile and carcinogenic solvents such as benzene and toluene has an impact on the environment and human health