Flexible Printed Circuits Withstand High Temperatures
If a flexible circuit board is exposed to high temperatures for long periods of time, the components on it may start to fail. This is due to the fact that if heat is not dissipated properly, it can build up inside the circuit board, and cause it to heat up. As the temperature continues to increase over time, it can also cause the copper traces on the board to become brittle. This can lead to the breakage of connections between the copper traces and the rest of the circuit board. If this happens, the circuit board will no longer be able to function as intended and will cease to perform as a whole.
This is why it’s important to consider the maximum operating temperature when designing a flex circuit. Different flex circuit materials have different maximum operating temperature capabilities, so it’s important to choose the right material for your project.
There are many applications that require a flexible printed circuit to be exposed or continuously operated at elevated temperatures, such as autoclaving medical equipment and drilling machines. This type of exposure can create a range of challenges for the design and manufacturing process. For example, the circuit may need to withstand a reflow temperature profile for RoHS soldering. In other cases, the flex circuit may be required to withstand high-temperature environments for extended periods of time, and it must be able to maintain its structural integrity.
Can Flexible Printed Circuits Withstand High Temperatures?
To address these concerns, the flex circuit must be constructed using durable materials. This means that the circuit must be made with a strong copper core, and it must have a durable insulating layer to prevent thermal stresses. In addition, the circuit should be designed with a serpentine copper pattern to help with the dissipation of heat. Lastly, the copper must be coated with an effective anti-corrosive material to protect against chemical exposure, which can occur from environmental contaminants or even cleaning supplies.
Another challenge for a flex circuit is that it must be able to accommodate the expansion and contraction of electronic components when heated or cooled. This can cause the circuit to warp or bend if not designed correctly, and it could also result in broken linkages that impede current flow. This can be overcome by using a copper EMI shielding layer that is bonded to the insulating film, or by using a non-corrosive polyimide or polyester adhesive.
To make sure that your flex circuit can withstand the temperatures of your application, it’s important to consult with a PCBWay specialist before placing an order. They can review your specifications and determine the best flex circuit construction for your unique needs. In addition, they can do a full electrical test on your flex circuit to ensure that it is functioning properly. They can also offer a wide range of additional services, including prototyping and assembly, to meet your specific requirements. For more information, please contact us today!