Lifespan of Pcb Design & Assembly
The lifespan of pcb design & assembly can vary between a few years to tens of years depending on the materials used, environmental conditions, and usage. These factors all contribute to a PCB’s longevity, and each factor should be taken into consideration when choosing a product for your application.
The initial phases of a PCB project involve the component procurement process, in which engineers ensure that all parts are compatible with the desired specifications of the board. This includes evaluating the component requirements against the design for assembly (DFA) guidelines, and identifying viable substitutes where necessary. This can be especially challenging when the final product will be subjected to a rigorous environment, such as a construction site, where vibrations are likely to occur.
During the pcb design & assembly fabrication process, the base board is treated with specific coatings that can help to prolong its lifespan. For instance, some types of plating offer improved immunity to humidity and high temperatures, making them more resistant to oxidation. Similarly, antistatic control helps to minimize the risk of electric shocks that can damage delicate components and deteriorate the panel.
Another way in which the lifespan of a PCB can be extended is by following the manufacturer’s storage and baking instructions carefully. These typically recommend using moisture barrier bags and storing the boards in a regulated space with consistent temperature and low humidity, as well as keeping them away from contaminants that can wear them down.
Assembled PCBs can also benefit from an additional layer of protection with a protective finishing treatment, such as immersion in silver or gold. This type of treatment offers superior durability and provides added resistance to corrosion, helping the board to last longer.
The Lifespan of Pcb Design & Assembly
Even when proper care is taken during the pre-assembly, fabrication, and shipping phases, a PCB’s lifespan can still be significantly reduced by external variables that impact its performance. The most common cause of this is moisture, which can degrade the quality of lamination and solder mask, as well as reduce the integrity of components. Moisture can be exacerbated by improper storage and handling, as well as exposure to contaminants.
After the bare PCB is properly fabricated, the assembly phase begins. The electronic components are placed on the designated pads on the PCB using automated machines, known as pick-and-place systems, and then melted with a hot plate in a reflow soldering process to create reliable electrical connections. The finished board is then inspected for defects and errors, and functional tests are conducted to verify that it operates correctly. Assembled PCBs can enjoy a lifespan of up to 10 years when stored, handled, and baked properly.
Comprehensive design documentation is essential for smooth manufacturing and assembly. This includes schematic diagrams, bill of materials (BOM), Gerber files, and assembly drawings. Clear documentation ensures that the manufacturer understands the design intent, reducing the risk of errors during production.
Designers must ensure that the PCB meets industry standards and regulations such as IPC standards for PCB design and assembly. Compliance with standards ensures reliability, safety, and compatibility with other devices and systems.
