Function, usage, advantages and disadvantages of FPC flat cable

1、 What is FPC flat cable

When it comes to FPC cabling, you must know or be familiar with what FPC is? FPC can be divided into many types according to functions, such as FPC antenna, FPC touch screen, FPC capacitive screen, etc. FPC flat cable is one of them. Generally speaking, FPC flat cable is a connection line group that can be bent to a certain extent.

2、 Function and purpose of FPC flat cable

FPC flat cable is used to connect two related parts or products. Nowadays, many products use FPC cables because of its flexibility. FPC cables have been used in printers, mobile phones, laptops and many other products. FPC cable manufacturers are mainly concentrated in the Pearl River Delta region, with Shenzhen as the leader.

3、 FPC flat cable composition and parameters

FPC flat cable is a kind of FPC, so its composition is the same as that of FPC. FPC is generally long strip, with both ends designed as pluggable needles, which can be directly connected to the connector or welded to the product. The middle part is generally the line, because FPC flat cable requires a certain degree of flexibility, so the base material is generally calendered copper, which is resistant to twists and turns and flexible.

Cable layout parameters:

The minimum line width and line spacing shall be 3mil/3mil;

The minimum wire hole finished product reaches 0.15 mm.

4、 FPC cable laying process

The surface treatment process used for FPC cable laying is generally gold deposition, occasionally anti oxidation. However, the anti oxidation process can not withstand high temperatures, and the environmental tolerance is worse than that of gold deposition. The prices of the two are similar. Therefore, most of them adopt gold deposition process. In addition, there are processes such as tin plating and tin spraying, but the temperature resistance of FPC is generally below 280 ℃, while the temperature of tin spraying is above 300 ℃, and the hardness of solder paste is small, so it is rarely used.

5、 Advantages and disadvantages of FPC flat cable

advantage:

The volume and weight of electronic products can be greatly reduced by using FPC, which is suitable for the development of electronic products in the direction of high density, miniaturization and high reliability. Therefore, FPC has been widely used in aerospace, military, mobile communications, laptops, computer peripherals, PDAs, digital cameras and other fields or products. In addition, it can also be arranged arbitrarily according to the spatial layout requirements, and move and expand freely in three-dimensional space, so as to achieve the integration of component assembly and wire connection.

Disadvantages:

In the process of producing products, cost should be the most important consideration. Because the soft FPC is designed and manufactured for special applications, the initial cost of circuit design, wiring and photographic plate is high. Unless there is a special need to apply soft FPC, it is better not to use it in a small amount of applications. In addition, since a lot of efforts have been invested, the later maintenance is also essential, so soldering and rework require trained personnel.

Storage of FPC flat cable

Unlike other products, FPC cannot contact with air and water. So how should we store this product correctly? I believe you will find the answer after reading the following content.

First of all, the vacuum of FPC cannot be damaged. When packing, a layer of bubble film needs to be enclosed around the box. The bubble film has good water absorption, which plays a good role in moistureproof. Of course, moistureproof beads are also indispensable.

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