How to prevent solder paste defects?

SMT patch processing in the production process there will be a lot of different processing defects phenomenon, different environments, different operating methods will lead to different processing defects, SMT patch is also a precision type of processing, there are some problems is normal, need to do is in the processing of good quality control.

These problems that may arise all solve, and solder paste defects in SMT processing defects belong to the more common, solder paste defects involved in the processing of the link is more numerous, such as BOM and Gerber, component procurement, storage and access control, solder paste printing, SPI solder paste testing, reflow soldering, etc., the following Shenzhen Jiajinyuan solder paste manufacturers to give you a brief introduction to how to prevent The appearance of solder paste defects:

In the process of SMT SMD processing, the requirements of the quality management system must be strictly enforced.

First, in the high-volume SMT SMD processing in the processing cycle is generally longer, then the stencil may exist dry solder paste, or stencil openings and circuit boards are not aligned and other factors that can easily lead to poor soldering, these need to be dealt with in a timely manner.

Second, in the solder paste printing process to fix the printing cycle in a specific pattern. Ensure that the template is located on the pad, which can ensure that the solder paste printing process clean. For micro-fine templates, if the template cross-section due to bending between the thin pin damage occurs, may lead to printing defects and short circuits.

Third, the SMT package in the printing of solder paste, should be printed immediately after the improperly printed plate into the soaking solvent, because the solder paste is easy to remove before drying.

Fourth, in order to prevent solder paste and other contaminants left on the surface of the board can be wiped with a clean cloth. After soaking, brush with a mild spray and preferably use a hot air blower for drying. If a horizontal stencil cleaner is used, the cleaning side should be downward to allow the solder paste to come off the stencil.

Noble Flower solder paste manufacturers produce a variety of tin solder products, including lead-free solder paste, halogen-free solder paste, silver-containing leaded solder paste, syringe solder paste, nickel-plated environmentally friendly solder wire, solder bars, etc. We can provide technical support, if you have the needs or technical problems about soldering, welcome to leave a message online to interact with us!