In the quality control process of electronic manufacturing, circuit board cleaning is a key process to ensure product reliability, and dry ice, with its unique physical properties, has become the “green cleaning guardian” of this process.
During the production process of soldering, assembly, etc., circuit boards are prone to residual impurities such as flux residue, oil stains, metal debris, and dust on the surface. If these seemingly small pollutants are not thoroughly removed, they may cause serious problems such as circuit short circuits, signal interference, or poor contact, directly affecting the performance and service life of electronic devices. Traditional cleaning methods rely heavily on chemical solvents, which may not only cause corrosion and damage to precision chips, capacitors, and other components on circuit boards, but also generate toxic waste liquids, polluting the environment.
Dry ice cleaning technology has completely changed this situation. The core principle is to turn solid carbon dioxide (dry ice) into particles with a diameter of only a few tens of micrometers, and accurately spray them onto the surface of the circuit board through high-pressure airflow. When dry ice particles come into contact with the circuit board, they will sublime instantly at a low temperature of -78.5 ℃, rapidly expanding in volume by hundreds of times, and the impact force generated can completely peel off the attached impurities. At the same time, low temperature environments can rapidly freeze and brittle impurities such as oil stains and soldering flux, further enhancing the removal effect.
More importantly, after sublimation, dry ice will be directly converted into gaseous carbon dioxide. The entire cleaning process has no residual substances, which will not damage the substrate and precision components of the circuit board, nor produce harmful waste. It perfectly balances cleaning efficiency and environmental protection requirements, becoming an indispensable green cleaning solution in electronic manufacturing.
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