What Are The Requirements For PCBA Storage At Different Stages

The PCBA production process needs to go through several storage stages. When the SMT patch processing is completed and transferred to the dip plug-in processing, it usually needs to be stored for a period of time before the plug-in processing. After PCBA board testing and finished product assembly, there is usually a period of storage time. What are the requirements for PCBA storage at different stages?

1. Store after SMT patch processing

Usually, the SMT patch will be placed in the dip workshop for 1-3 days after processing, sometimes longer. For ordinary plates, the temperature is controlled at 22-30°C and the humidity is controlled at 30-60%RH, which can be placed on an anti-static rack. However, the PCB board of the OSP process needs to be stored in a constant temperature and humidity cabinet. The temperature and humidity requirements are more stringent, and the soldering should be completed within 24 hours as much as possible, otherwise the pads are easily oxidized.

2. Storage after PCBA test is completed

Usually, PCBA boards are quickly assembled after testing. In this case, the temperature and humidity are well controlled, and there is no need for too many requirements. However, if long-term storage is required, it can be coated with conformal paint and vacuum packed. The ambient temperature is controlled between 22-28℃, and the relative humidity is 30-60%RH.