Impact of Flex Circuit PCBs on Product Weight
Flex Circuit PCBs on Product Weight
The main benefit of using flex circuits is that they allow designers to eliminate or consolidate cables. This can reduce the weight of the product significantly compared to Rigid PCBs or wire harnesses, as well as reducing assembly time and costs. The flexible nature of the circuits also helps to absorb and disperse vibration and shock, reducing stress to the boards themselves as well as solder joints in connections.
The primary material used in flex circuits is polyimide, which is often referred to by the brand name Kapton, and it has been successfully used in aerospace systems for many years. This material is very thin and flexible, but it is also tough enough that it will not tear or noticeably stretch under normal use, ensuring the longevity of the circuits in the field. Polyimide is a good choice for flex circuits because it is also extremely heat resistant and tolerant of reflow soldering processes, making it able to withstand the intense environmental stresses that a flex circuit will experience in the field.
When designing a flex circuit, it is important to consider the maximum amount of flexibility required as well as the minimum bend radius needed for the design. For instance, it is advisable to use larger bending angles and less tighter bends in order to minimize the strain on the copper. This can be achieved by staggering the conductors or by utilizing cutouts in the area of the flex circuit pcb that is not being used for traces. It is also a good idea to avoid using plated through-holes in the area of the flex circuit where it will be bended as this increases the chance of damage to the circuitry.
Impact of Flex Circuit PCBs on Product Weight
Another factor that can impact the flex circuit’s flexibility is the layer stack. The higher the layer count, the thicker the board will be, and therefore the lower its pliability. The pliability of a flex circuit can also be improved by using smaller conductor thickness and by cross-hatching the layers.
Lastly, it is a good idea to always keep the manufacturing process in mind when designing a flex circuit. It is advisable to use high-quality materials that will ensure the integrity of the circuits and the overall performance of the finished product. Cheaper alternatives may seem like a bargain, but they will almost certainly result in thermal problems, electrical issues and a decreased lifespan of the circuitry.
If you are interested in incorporating a flex circuit into your next product, it is a good idea to work with an experienced PCB designer who will be able to provide the advice that is necessary for a successful outcome. The right partner will be able to help you to create a quality flex circuit that will meet your exact requirements and exceed all of your expectations. The best way to find a great partner is by asking for recommendations from past clients. They will be able to provide you with invaluable insight into what it is really like to work with a particular designer.
