Printed circuit boards are very significant in modern electronics, and keeping them stored correctly ensures their function for many years. Whether you produce them, use them for projects for entertainment, or work on them for engineering projects, storing PCBs in the right manner can save you from trouble, save your time, and prepare your materials for your next work. In this tutorial, you will learn the optimal PCB storage conditions, the best method for storing PCBs, and some recommended places for PCB storage.
Why Good PCB Storage is Important?
PCBs can also be sensitive to the environment, including humidity, temperature, and static electricity. If not handled correctly, this can lead to:
- Oxidation of copper traces: This can make the connection and solder difficult;
- Delamination: Absorbed moisture can cause the layers of the PCB to delaminate;
- Component degradation: Sensitive components mounted on the PCB may degrade over time when under improper conditions;
- Electrostatic discharge (ESD) damage: Static electricity can damage sensitive components on the PCB.
Correct PCB storage can ensure the performance of PCB boards and extend the PCB shelf life as much as possible. Therefore, it is very important to learn about the storage conditions, where to store and how to store PCBs.
What are the Optimum Conditions for Storing PCBs?
Following PCB storage conditions will help your PCBs maintain good performance and extend their useful life.
Temperature Control
- The optimum temperature is from 15°C (59°F) to 25°C (77°F).
- Avoid extreme temperatures, as high heat can warp the board, and freezing temperatures can cause condensation.
Humidity Control
- Relative humidity (RH): Maintain the range from 30% to 50%.
- High humidity can wet things, causing them to rust or peel. If you need to, use dehumidifiers.
- For the short term, store PCBs under vacuum-sealed packaging containing desiccants to exclude humidity.
Constant Environment
- Keep PCBs under anti-static packaging (bags or cases) to avoid exposure to electrostatic discharge (ESD).
- Use fixed store racks or shelves to minimize the hazards of ESD.
Tidy and Organised Spaces
- Dust and small fragments can influence the effectiveness of the solder and also short circuit. Store PCBs somewhere clean, ideally wrapped up in packages or bags.
Avoid the Sun
- UV light will cause the PCB material to deteriorate over the long run. Store PCBs somewhere dark or where light is very weak.
Orientation
- The PCB has to be mounted keeping the space available and the packaging type in mind. Up-and-down mounting occupies the least space and also lightens the load on the circuit boards.
Where to Store PCBs？
After understanding PCBs storage conditions, let's see which places are suitable for storing PCBs. Picking the right location for storing PCBs is very significant. Consider the following good locations:
Rooms / Cabinets for Temperature Control:
- Ideal for long-term storage, these environments maintain consistent temperature and humidity levels.
- Usually located in manufacturing factories or laboratories.
Dry Storage Cabinets:
- These dehumidifying cabinets are designed for humidity control and possess dehumidifying drying equipment.
- Good for medium-term storing.
ESD-Safe Storage Racks:
- Grounded racks or anti-static shelves where there is not much static electricity are best for storing PCBs under anti-static bags.
- Usually applied when the electronics are assembled.
Vacuum-Sealed Containers:
- To store things for the long run, vacuum-packed packages containing desiccants will suck the oxygen and the water.
- Good for sensitive or valuable PCBs.
Warehouse Storage:
- If you store things in a warehouse, ensure the building is clean, not wet, and has a consistent temperature.
- Put the PCBs against walls or pallets where the PCBs will not make contact with the water.
How to Store PCBs: Safe Methods for PCB Storage
After learning about the storage conditions of PCBs and which places are suitable for storing PCBs, the next step is to understand how to store PCBs. Proper PCB storage methods are essential to protect PCBs from being damaged.
Packaging
- Anti-Static Bags: To protect PCBs from humidity and static electricity, store them in anti-static pouches. After those are safely closed, store those pouches in anti-static bags containing a moisture barrier for double security.
- Vacuum-Sealed Bags: For long-term storage, vacuum-seal PCBs with desiccant packs to prevent moisture and air exposure.
- Bubble Wrap or Foam Inserts: Use these for carrying or moving PCBs for protection from possible injury.
Orientation
- Vertical Storage: Place PCBs against walls stacked upon racks or shelves for space conservation and reduced weight upon the boards.
- Horizontal Storage: To avoid pressure damage when stacking PCBs, apply dividers or spacers.
Labelling and Organization
- Write the date, type, and all relevant data onto the PCB store labels.
- Use the “first-in, first-out” (FIFO) technique for utilizing the PCBs starting from the earlier available one.
Ongoing Evaluations
- Periodically check stored PCBs for signs of damage or degradation, such as discolouration, warping, or oxidation.
Avoid Stacking Without Proper Precautions
- In order to avoid the deformation risk of PCBs caused by stacking pressure, dividers or spacers can best be utilized while providing good ventilation.
Conclusion
Storing PCBs correctly is essential to ensure that they will work correctly and also for them to last for many years. Excellent packaging along with appropriate temperature, humidity, and degree of static electricity will guarantee that your PCBs will stay in excellent condition for usage as needed. Whether you keep PCBs not assembled or PCBs assembled, this will guarantee that your electronics projects work as expected and you won't pay for expensive repairs or replacements.
Correctly storing PCBs guarantees your investment and guarantees dependability in the operation of your electronic equipment.
