What is the FPC line? What is the function?

What is FPC wiring

Speaking of FPC wiring, you must know or familiar with what FPC is? FPC can be divided into many kinds according to the function, such as FPC antenna, FPC touch screen, FPC capacitive screen, etc. FPC line is one of them. Generally speaking, FPC line is the connection line group that can be bent in a certain degree.

Two.FPC wiring function and use

The function of FPC wiring is to connect two related parts or products. Now, a lot of products are used to line, because it has a certain flexibility in the printer. FPC wiring has been used in many products such as mobile phones and notebooks. FPC line manufacturers are mainly concentrated in the Pearl River Delta region, which is headed by Shenzhen.

3.FPC layout and parameters

FPC wiring is a type of FPC, so its composition is the same as that of the FPC. The FPC is typically long and designed with pluggable needles at both ends that can be directly attached to the connector or welded to the product. The middle is generally the line, because the FPC line needs a certain flexibility, therefore, the base material is generally calendered copper, tortuous resistance, flexible.

Line parameters:

The minimum line width line spacing is 3mil/3mil;

Minimum wire hole finished product up to 0.15mm.

FPC wiring process

The surface treatment process used for FPC line is usually gold immersion, and occasionally oxidation prevention. But the anti-oxidation process can not withstand high temperature, the environmental bearing capacity is worse than the gold sink, the two prices are similar, therefore, most of the gold sink process. In addition, there are tin plating and tin spraying process, but FPC temperature is generally below 280 degrees Celsius, and tin spraying will have more than 300 degrees Celsius temperature, and tin paste hardness is smaller, so it is rarely used.

5. Advantages and disadvantages of FPC layout

Advantages:

FPC can greatly reduce the volume and weight of electronic products, suitable for electronic products to high density, miniaturization, high reliability development needs. Therefore, FPC has been widely used in aerospace, military, mobile communications, portable computers, computer peripherals, PDA, digital cameras and other fields or products. In addition, it can be arranged according to the spatial layout requirements, and can be moved and expanded in three-dimensional space, thus achieving the integration of component assembly and wire connection.

Disadvantages:

Cost should be the most important consideration in the production process. Since the flexible FPC is designed and manufactured for special applications, the initial circuit design, wiring and photographic plates are expensive. Unless there is a special need to use soft FPC, it is usually best not to use it in a small number of applications. In addition, since a lot of effort has been put into doing it, the maintenance of late is also essential, so tin welding and rework need to be trained personnel operation.

FPC line storage

Unlike other products, FPC flexible circuit boards are not in contact with air or water. So how do we store this product correctly? Believe that read the following content, we will find the answer.

First of all, the vacuum of FPC flexible circuit board can not be damaged. When packing, you need to surround the side of the box with a layer of bubble film. The water absorption of the bubble film is better, so that it plays a very good role in moisture-proof.

Secondly, after sealing the box must be separated from the wall, stored away from the ground in a dry and ventilated place, but also avoid sunlight. The temperature of the warehouse is best controlled at 23±3℃, 55±10%RH. Under such conditions, PCB boards with surface treatment such as gold, electrogold, tin spraying and silver plating can generally be stored for 6 months, and PCB boards with surface treatment such as silver, tin and OSP can generally be stored for 3 months.