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Flexible circuit

Release time: 22/10/2018

The growing Hemeixinpcb customer demand for the design and manufacturing of wearables and Internet of Things (IoT) is dramatically expanding our flex circuitry design and manufacturing experience base. Not long ago, flex circuitry was considered a required item for a particular PCB design. However, today, it is taking center stage and is mainstream, not only for wearables, but also for other small PCB applications.

 

Whereas sheet-to-sheet processes are hindered by multi-step batch handling procedures and small substrate sizes, roll-to-roll processing enables the high speed, continuous processing of a long flexible web that’s typically 100m long. With this method, production efficiency is improved dramatically, producing tens of thousands of small flexible circuit on one long continuous production web. Roll-to-roll can accommodate single- and double-sided flexible circuit, and the processing of the inner layers of multi-layer flexible circuit.

 

Roll-to-roll processing infrastructure requires a significant upfront capital investment in customization of all the described production equipment as well as for the other processes including the chemical lines. This investment is far larger than what’s required for sheet-to-sheet processing, so flex circuit suppliers have been understandably conservative with roll-to-roll adoption. However, by eliminating flex handling damage, the benefits of using the roll-to-roll process for higher quality and higher yields make it cost effective.

Flexible circuit have three or additional layers of conductors are known as multilayer flexible circuit. Normally the layers are interconnected by means of plated through holes, though this is not a condition of the definition for it is probable to supply openings to access lower circuit level features. The layers of the multilayer flexible circuit may or may not be incessantly laminated mutually throughout the building with the noticeable exemption of the areas engaged by plating through-holes. The practice of irregular lamination is familiar with cases where utmost flexibility is compulsory. This is accomplished by leaving unbounded the areas wherever flexing or bending is to happen.