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In recent years, with the widespread popularity of mobile products such as smart phones and tablet computers, flexible circuit boards that were not previously known to everyone are also widely used, but many people do not know the structure of FPC.
From the combination of flexible circuit board base material and copper pad, it can be roughly divided into glued flexible circuit board and non-adhesive flexible circuit board.
No glue type products. In terms of price, glue-free flexible circuit boards are much more expensive than those with glued materials. The main reason is that the processing of glue-free substrates is difficult and complicated. In terms of performance, non-adhesive FPC is better than products with adhesive in terms of the bonding force between the copper foil and the substrate and the flatness of the pads, and the flexibility is also better than the products with adhesive.
Although the glued flexible circuit board is slightly inferior to the glueless product in some aspects, its price is relatively cheap, and the performance is not much different from that of the glueless product. General products are sufficient, so the application of flexibility in the market Most PCBs still use glued materials. Our company also mainly uses plastic materials for production, but each customer's requirements are different, and the material selection is mainly based on the customer's needs.
Same as hard boards, soft boards are also divided into single-sided, double-sided, and multi-layer boards.
The general structure of single panel is: cover film (PI)/adhesive (ADH)/copper platinum (CU)/adhesive (ADH)/substrate (PI), some special soft boards such as single-sided double contact (different panel), single-sided Hollow boards(also double-sided hollow circuit boards) have only one layer of copper and platinum.
Double panel general structure: cover film (PI)/adhesive (ADH)/copper platinum (CU)/adhesive (ADH)/substrate (PI)/adhesive (ADH)/copper platinum (CU)/adhesive (ADH)/cover Membrane (PI), another layered flexible circuit board is bonded with an adhesive between two single-sided boards.
Multilayer soft board general structure: multiple single-sided or double-sided boards are combined with adhesive.
FPC is much more flexible in structure than traditional PCB hard boards. With the rapid development of technology, FPC will involve more and more application fields, which will definitely promote the development of the FPC market!
