N0. 18 Tuas South Street 3
Jurong Industrial Estate, Singapore
Phone: +65 6862-0802
Fax +65 6862-0800
Printed Circuit Boards
Flexible PCBs are offered in a number of layer configurations ranging from Single Sided, Double Sided THP ( 2 layer), to 8 layer (multilayer) stack builds. Two types of laminate materials are offered, these being Polyimide (Kapton) and Polyester. Both are available in varying thickness, Polyimide being the more popular due to its superior mechanical stability over large temperature ranges.
Generally the one material type is used for both substrate and the insulation layers (if applicable). The outside conductors (typically copper) can be covered in conventional solder mask or covered with a Polyimide/polyester insulator layer.
Most commonly stiffeners are either FR4 laminate or polyimide and are bonded using an epoxy adhesive.
Impedance control and shielding also lends itself well to this technology, not only for the design of multi-layer boards which support components, but for flex boards which act as cable assemblies. This characteristic cannot be reproduced economically, if at all, using conventional wiring techniques. The tight mechanical manufacturing tolerances translate to the impedance also being controlled to a tight level.
Flexible circuit boards may require a tight radius fold which holds its shape in a relaxed position. The application of this fold is called forming and is a standard option we offer. Customers need to however take into consideration that this process may be better implemented after loading of the PCB to avoid problems with handling and compatibility with pick and place machines.
The SRD is elatively low cost to manufacture as it consists of sharp steel cutting blades embedded into a soft wood base. The tool has a short cycle life and as such is suited to samples and small production run quantities.
The Punch and Die tool on the other hand is a high
tolerance, high precision, long life tool and is the only suitable
option for production quantities. The tool is first designed using
CAD and then machined on CNC mills using tool grade steel. The cost
of the tool varies greatly and is dependant on the size and complexity
The PCB Company P/L offer all three cut out options and will advise customer as to the best option given the customer's requirements.
Copyright © 2004 The PCB Company Pty Ltd All rights reserved - Last modified: Jan 18th 2016
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