The FPC in the black hole production line is the abbreviation of Flexible Printed Circuit, also known as flexible circuit board, flexible printed circuit board, flexible circuit board, abbreviated as soft board or FPC , It has the characteristics of high wiring density, light weight and thin thickness.

The flexible printed circuit is made of polyimide or polyester film as a substrate with high reliability and excellent flexibility. It has many advantages that rigid printed circuit boards do not have. It can be bent, wound, and folded freely according to the space layout requirements, and can be moved and stretched freely in three-dimensional space, so as to achieve the integration of component devices and wires. This kind of circuit can not only be bent at will, but also has light weight and small size. The heat dissipation performance is good, the installation is convenient, and it breaks through the traditional interconnection technology concept.

FPC can greatly reduce the volume of electronic products, and is suitable for the development of resistance products in the direction of high density, miniaturization and high reliability. Therefore, FPC is used in aerospace, military, mobile communications, consumer electronics, industrial control, medical and other fields The products have been widely used.

The basic structure of FPC black hole line flexible circuit board

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 adhesives 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 adhesives.

Although glued flexible circuit boards are slightly inferior to non-adhesive products in some aspects, they are less expensive, and their performance is not much different from that of non-adhesive products. General products are sufficient, so they are used in the market. Most of the flexible 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 rigid boards, flexible 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.

The general structure of double-sided panels: cover film (PI)/adhesive (ADH)/copper platinum (CU)/adhesive (ADH)/substrate (PI)/adhesive (ADH)/copper platinum (CU)/adhesive (ADH) )/Cover film (PI), another layered flexible circuit board is bonded with adhesive between two single panels.

General structure of multi-layer soft board: multiple single-sided or double-sided boards are combined with adhesive.

FPC black hole line manufacturers’ soft boards are much more flexible in structure than traditional PCB hard boards. With the rapid development of technology, soft boards will involve more and more application fields, which will definitely promote the soft board market. Development!