RIGID-FLEX
PCB
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www.pcbco.com.au N0. 18 Tuas South Street 3 Jurong Industrial Estate, Singapore Phone: +65 6862-0802 Fax +65 6862-0800 Email: info@pcbco.com.au |
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RIGID-FLEXIBLE Introduction: Rigid-Flex PCBs are differentiated from "Flexible PCBs with stiffener" in that the stiffener does not have any electrical conductors. The theoretical minimum numbers of tracking layers is two, however in practice these hybrid boards are supplied with a minimum of 3 layers. This being a single sided flex board sandwiched between two pieces of FR4 rigid laminate.
With incremental increases in complexity and costing, this layer build can be increased to designs incorporating numerous layers within the rigid sections and numerous layers within the flexible section.
Advantages
of Rigid-Flexible Printed Circuit Boards: Reduced size and weight: This hybrid technology allows for the miniaturisation of a design in a number of ways. Firstly it allows for the PCB to be designed on a multidimensional level, rather than just a flat plane. This allows the PCB to be more efficiently designed to fit into a 3 dimensional space. Secondly as the flexible PCB component does away with interconnection, cables and plugs can be reduced or eliminated, saving both PCB real estate and connector volumetric space. Reduction of connectors: By integrating the flexible PCB into the rigid PCB, a Flexible pcb tail can protrude out of the rigid pcb area and be used as a cable for both power and signal, to and from the main rigid PCB area. Apart from the reduction of components and effective space required, the flexible section can offer shielded, impedance controlled inter-connectivity, which is difficult to achieve using alternate technologies. Shock and vibration: Since the flexible section of the assembly is bonded to the rigid section, and the flexible section has low mass with good ductile properties, Rigid-Flex assemblies are not only suitable for environments which expose the product to shock and vibration, but also provide a solution which can provide an increased level of reliability as compared to conventional solutions. Low Cost: By reducing component count and hence manufacturing costs, the increased cost of this PCB can often be compensated for by these savings. When the added considerations of reliability, reduced space and increased performance are added to the equation, Rigid-Flex boards are often found to be the lowest cost solution for a diversity of applications.
Conclusion:
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