How to deal with the residual flux in reflow soldering?

Reflow soldering technology is not unfamiliar in the field of electronic manufacturing. The components on various boards used in electronic devices are all soldered onto the circuit board through the reflow soldering process. Inside the reflow soldering machine, there is a heating circuit that heats air or nitrogen to a sufficiently high temperature and then blows it towards the circuit board where the components have been attached, causing the solder on both sides of the components to melt and bond with the main board.

Flux pasteIt is a product used in the operation of reflow soldering. Its function is to help reflow soldering complete the components and to the greatest extentpcbPerfect pad welding, mainly used for improvementsmtThe soldering process of surface mount technology, and if the reflow soldering machine is used for a long time, there will be solder paste residues. If not properly handled, it will cause serious problems. Now, let's take a look at the hazards of solder paste residues and solutions with the help of JJY Solder Paste Manufacturer.

I. Problems that may be caused by residual solder paste

1Yes.pcbaThe board has a certain corrosiveness.

2Reduce conductivity and cause migration or short circuits;

3Excessive resin residue, adhering to dust and debris;

4It affects the usability and reliability of the product.

Ii. Countermeasures for Solving the Problem of Solder paste Residue

1Select the appropriate solder paste with moderate activity.

2Use flux paste that can form a protective film after welding;

3Use solder paste with no resin residue after welding;

4Use low-solid-content no-cleaning flux paste;

5Cleaning of reflow soldering equipment after soldering.

Shenzhen JJY Industrial Technology Co., Ltd. mainly engages in:SMTSolder paste manufacturers of solder paste, syringe solder paste, lead-free solder wire, wave soldering bar, automatic soldering wire, etc.