【 JJY 】 How to prevent solder paste printing defects?

SMTSome details of placement can eliminate some bad conditions, such asSolder pastePrinting, removing solder paste from the circuit board. Our goal is to deposit solder paste where it is needed. Misalignment or inconsistency between dyeing tools, dry solder paste, molds and circuit boards may lead to unsatisfactory solder paste at the bottom of the mold or during the assembly process. So, how can solder paste defects be prevented? JJY solder Paste Manufacturer would like to share with you:

Using a small scraper to remove solder paste from the wrong printed circuit board may cause problems. Printed boards with incorrect solder paste printing can usually be immersed in compatible solvents, such as water containing additives, and small tin particles can be removed from the board with a soft brush. Soak and clean repeatedly instead of scrubbing or shoveling vigorously. After printing solder paste, the longer the operator waits to clear the printing error, the more difficult it is to remove the solder paste. When problems are found, improperly printed paper should be immediately immersed in the soaking solvent, as the solder paste can be easily removed before it dries.

Wipe with a piece of cloth to avoid solder paste and other contaminants on the surface of the circuit board. After soaking, rinse with a mild spray, which usually helps remove unnecessary solder paste. Meanwhile,SMTHot air drying is also recommended for surface mount processing equipment. If a horizontal template cleaner is used, the cleaning surface should face down to remove the solder paste on the template.

During the printing process, the printing cycle rubs between the templates in a specific pattern. Make sure the template is on the pad rather than on the solder mask to ensure that the solder paste printing process is clean.

For fine templates, if damage occurs between thin pins with curved template segments, solder paste may deposit between the pins, thereby causing printing defects and/Or short circuit. Low viscosity can also lead to solder paste printing defects. For instance, high working temperatures or high-speed blades can reduce the viscosity of solder paste during use, leading to printing defects and redundant deposition of bridge solder paste.

When choosing solder paste, please give priority to those with guaranteed after-sales serviceR&DSupplier of the laboratory. The sample can be adjusted for problems and then an order can be placed. If you want to know about partners for solder paste, solder paste, low-temperature solder paste, solder wire and solder bar, welcome to consult Shenzhen JJY Industrial Technology Co., LTD. We will lead you to learn and grow together!