What is FPC and FPC Tech FPC的定义和技术

In recent years, there is a significant reduction in size as well as weight of portable electronic products such as mobile phones, digital cameras and camcorders because of the built-in electronic components. Many of these electronic components have the wire and the terminal soldered on the probe inside the zone of a circuit board for electric current connection. Often the use of flexible boards is to have the connection of electric current among various circuit boards. A flexible board is also used for electric current connection between a camera module and other parts of a circuit board.


The structure of flexible circuits has significantly become more important in recent years. It is because the structure, as compared to that of a rigid PCB, offers more advantages. A flexible PCB is lighter by weight and slimmer and smaller by size. It also has characteristics including a better extension and flexibility, and a higher density of the wiring. A flexible PCB can have a 3-dimensional wiring and its appearance can be modified according to the space limitation. Because of its flexibility, a controlled weight and other similar characteristics, a flexible circuit offers a typical efficiency for electronic packaging. For a high quantity of production, the cost of production can be significantly reduced by combining the flexible circuit with a more efficient production procedure.

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A flexible PCB includes a flexible board that offers the wiring and the connection pad. The conduction was achieved via wirings surrounding the flexible board. The printed circuit board (PCB) used in the flexible PCB is made by brazing the copper clay laminate onto a resin baseboard and then it is fitted into an intact circuit board, either by adhesive agents or thermal pressure, to achieve a multilayer connection. A circuit board may have one or more than one multilayer conduction, and this is similar to having one or two sides of the surface of a main circuit board. A circuit board usually provides many layers of functions in extra, for example, an insulating layer, an adhesive layer, a compressing layer and a hardened layer. A typical plastic baseboard of an optical conduction circuit board is made by polyimide or other similar engineering plastic materials, such as polyether-imides or PBT. Some adhesive agent, e.g., resin adhesive, is applied on the top of the baseboard, and then majority optical fibers are placed on top of it.


Flexible PCB has been used very commonly because of a low cost, an easy assembly in the interconnecting system, and a minimum occupied space.Most often, a flexible PCB is used when a 3-dimentional connection is required, for example those connections of between circuit boards, between a circuit board and a wafer, and between wafers that have a limited space, or the connection for packed multilayer rigid circuit boards. Majority flexible circuit is used for portable electronic products such as laptops, mobile phones, PDA and information equipments. For example, a flexible PCB can be used for making connections between the LCD, or between a floppy drive, a hard drive or a main board with the CD-ROM. A hard drive includes a disc that is inside the box, a disc that is supported and rotated by a spindle motor, and a read and write head that is driver-driven, a driver that is voice coil motor driven, a plate unit, and so on. On each component, a read and write head is connected to a relay terminal of the flexible PCB (in the following it will be mentioned as the flexible circuit board relay), and other relay terminals of the flexible PCB are connected to the main soft PCB.

 

 A flexible PCB is mainly applied on the surface assembly of electronic components such as IC, resistors, capacitors, and connectors to implement functions of the electronic product. Because of a growing demand for a smaller and slimmer electronic product, the characteristics of flexible PCB, i.e., thin and soft, is going to make the development of flexible PCB to continue for quite a while. On the other hand, the development of flexible PCB will also facilitate the booming of the market for electronic products.

 

近年来,柔性电路的结构已变得越来越重要。这是因为该结构与刚性印刷电路板相比,提供更多的优势。一个柔性印刷电路板的重量和尺寸体积更小更轻的。它还具有包括一个更好的扩展和灵活性,以及更高密度的布线的特点。一个灵活的印刷电路板可以有一个3维的布线,它的外观可以修改,根据空间限制。由于其灵活性,可控制的重量等类似的特点,灵活的电路提供了一个典型的电子封装效率。对于生产的高质量,生产过程中的柔性电路与更有效的生产工艺相结合,可以大大降低生产成本。

 

近年来,便携式电子产品如手机,数码相机和摄像机的重量和尺寸在规模大幅减少,因为内置的电子元件。这些电子元件连接在一个电路板带探针的导线与端子焊接。挠性板的使用通常是在各种电路板之间有电流的连接。一个挠性板也可用于在摄像机模块和电路板的其他部分之间的电流连接。

 

一种挠性电路板,包括一挠性板,其提供配线和连接垫。传导是通过围绕柔性板布线的实现。印刷电路板(PCB)用于柔性印刷电路板的钎焊铜层压板树脂基板上的粘土,然后装配成一个完整的电路板,通过粘合剂或热压力,实现多层连接。电路板可具有一个或多个多层导电,这类似于主电路板表面的一个或两个侧面。电路板通常提供多个层的功能,例如,绝缘层,粘合层,压缩层和硬化层。一个典型的光学传导电路板塑料基板是由聚酰亚胺或其他类似工程塑料的材料制成,如聚醚酰亚胺或PBT。一些粘合剂,例如,树脂胶粘剂,应用于该基板上,然后大多数光纤放在上面。

 

柔性印刷电路板已经因为成本低很常用,在互连系统易于组装又有最小的占用空间。通常,柔性PCB时使用一个三维连接是必需的,例如那些连接之间的电路板,电路板和晶片之间,之间,有一个有限空间的晶片%8