When customers customize PCB products, they will always make more in case of emergencies. After a long time, there will be a phenomenon that the PCB board expires but is ignored by oneself. So, what are the hazards of using expired PCB circuit boards?
1. Expired PCB may cause surface pads to oxidize
Oxidation of the solder pad will result in poor soldering, which may eventually lead to functional failure or risk of missing parts. Different surface treatments of circuit boards will have different effects on anti-oxidation. In principle, ENIG requires that it be used up within 12 months; while OSP requires that it be used up within six months. It is recommended to follow the shelf life of the PCB board factory and Ensure quality.
2. Expired PCB may absorb moisture and cause board explosion
When the circuit board is reflowed after absorbing moisture, it may cause problems such as popcorn effect, board explosion or delamination. Although this problem can be solved by baking, baking may cause other quality problems.
3. The gluing ability of expired PCB may degrade and deteriorate
After the circuit board is produced, the bonding ability between layers will gradually degrade or even deteriorate over time. When the circuit board passes through the high temperature of the reflow furnace, it may cause delamination of the circuit board and surface air bubbles, which will seriously affect board reliability.
In short, the hazards of using expired PCB circuit boards are still quite large, and customers and friends should pay attention.
