PCB Tech - SMT patch processing flexible FPC status

(1) Mobile phone shopping mall. As far as mobile phones are concerned, FPCs are mainly used as parts for signal connections such as folding and rotating in mobile phones. Nowadays, more than 3 FPCs are used in general mobile phones. Following the popularity of light, thin, short and small high-function mobile phones, FPC demand is driven. .

FPC can be used in functions such as mobile phone bends, LCD modules, camera modules, buttons, side buttons, antennas, and battery control.

FPCs are currently used most frequently in mobile phone transfers (HingePart). The common ones are folding, sliding, clamshell and three-dimensional rotating bodies. Most of them are double-sided or multi-layer FPC planning. It is the largest FPC in the use of mobile phones. .

As for the button FPC, camera module, antenna or battery FPC, it is a selective plan for mobile phone planners. Under the situation that the above-mentioned selective functions will gradually be included in the mobile phone standardization plan, it will help increase the FPC usage.

The advantages and disadvantages of flexible circuit boards

Strengths:

(1) It can be bent, wound, and folded freely, can be organized according to the space layout requirements, and moved and elastically in three-dimensional space, and then reaches the integration of component installation and wire connection;

(2) The use of FPC can greatly reduce the volume and weight of electronic products;

(3) FPC also has outstanding heat dissipation and solderability, easy assembly and connection, and low cost. The planning of soft and hard combination also makes up for the slight deficiency of flexible substrates in component carrying capacity to a certain extent. .

shortcoming:

(1) High one-time initial cost

Because the flexible PCB is planned and manufactured for special applications, the initial circuit planning, wiring and photographic masters require higher costs. Unless there is a special need to use flexible PCB, it is usually best not to use it when it is used in a small amount.

(2) It is difficult to change and repair the flexible PCB

Once the flexible PCB is made, it must be changed from the base map or the programmed light drawing program, so it is not easy to change. The surface is covered with a protective film, which must be removed before repair and restored after repair, which is a relatively difficult task.

(3) The size is restricted

When flexible PCBs are not yet popular, they are usually made by batch process, so they cannot be made very long and wide due to the constraints of the size of the production equipment.

(4) Incorrect operation is easy to damage

Improper operation of the assembly and connection personnel can easily cause damage to the flexible circuit, and its soldering and rework require trained personnel to operate.

The use of flexible circuit boards

The demand trend for light, thin, short, and small electronic products has made FPC s quickly used in military products to be used for civilians and to consumer electronic products. In recent years, almost all high-tech electronic products that have emerged in recent years have adopted flexible circuit boards.