Water-containing alcohol-based cleaning systems Cleaning In addition, since a lot of wastewater is generated, a wastewater treatment facility is required. In addition, if the composition of the cleaning agent breaks down due to increased contamination, the contamination may reattach. However, since water is contained in the cleaning agent, the cleaning agent may require moisture control. Drying properties are much lower than IPA.īoth cleaning and rinsing agents have no flash point and are very safe. Pure water (highly purified in a water treatment facility). semi-aquaous systemĪ cleaning agent made by adding a surfactant and water to a solvent such as glycol ether. Also, because of the strong attack on the resin, it is necessary to check the effect of the cleaning agent on the parts. Hydrocarbon-based cleaning agents have high solubility in resin components such as rosin in flux, but they do not remove ionic contamination very well, so contamination may remain. Use a combination of decompression and vacuum.Įxplosion proofing of equipment is required and cleaning agents are often used above their flash point. Hydrocarbon cleaning systemsĬlean cleaning agent or cleaning agent vapor In addition, the impact of the cleaning agent on the human body and the environment (global warming) has been reported. Because of its high volatility, it tends to cause a lot of volatilization loss, resulting in higher running costs. The cleaning agent has no flash point and is very safe, and can be used in the same facilities as CFCs. It has been used in many degreasing applications and eutectic solder flux cleaning, but its solubility in Pb-free solder flux is low. Brominated and alternative CFC cleaning systemsĪlternative CFC and brominated cleaning agents Typical flux cleaning methods are summarized in the figures below. When selecting a flux cleaning method, it is necessary to understand not only the cleaning properties of the flux, but also the advantages and disadvantages of the method, such as its impact on the environment, safety, burden on workers (frequent fluid replacement and waste fluid treatment), and running costs. What are the different types of flux cleaning methods? , and flux cleaning is an effective way to prevent these kinds of problems from occurring. hindered appearance inspection or defective contacts in inspection equipment (in-circuit tester).poor penetration or poor curing of underfill resin,.poor adhesion and inhibition of curing of mold resins, moisture-proof coatings, etc.,.decreased bonding strength of wire bonding,.If solder balls generated during solder paste printing or pre-heating remain on the board surface via flux residue, they can cause leaks or short circuits.
Leaks and shorts circuit due to residual solder balls If the flux residue adheres to connectors or other contact points, it will cause connection failure. The flux residue itself is highly insulating. There is also a concern that "galvanic corrosion" will occur where different types of metals come into contact with each other. Halogen ions, such as flux residue, will form halogen compounds and disintegrate into rags under high temperature and high humidity. Ionic components of flux residue can cause ion migration under high humidity conditions, resulting in metal precipitation between electrodes, which can lead to short circuits. The purpose and reason for cleaning flux residue is to prevent the occurrence of electrical and physical problems such as the following I this page, we'll explain why we clean flux, what cleaning methods are available, and what is needed for efficient cleaning.
Water-containing alcohol-based cleaning systemsįlux cleaning is the process of removing the flux residue that is generated during the soldering process in the mounting of electronic components.Īs we've explained in 『What is flux?』page, flux cleaning is extremely effective in solving and preventing problems caused by flux residue. Brominated and alternative CFC cleaning systems
Cleaning -Deflux, metal / screen masks, carrier pallets and Reflow oven.
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