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F​lexible Circuit Board

- Jan 26, 2018 -

Flexible circuit board, for short, "soft plate", commonly known as FPC in industry, is a printed circuit board made of flexible insulating substrate (mainly polyimide or polyester film),

具有许多硬性印刷电路板不具备的优点。例如它可以自由弯曲、卷绕、折叠。利用FPC可大大缩小电子产品的体积,适用电子产品向高密度、小型化、高可靠方向发展的需要。因此,FPC在航天、军事、移动通讯、手提电脑、计算机外设、PDA、数字相机等领域或产品上得到了广泛的应用。

It has the advantages of many hard printed circuit boards. For example, it can be freely curved, winding and folding. The use of FPC can greatly reduce the volume of electronic products, and the application of electronic products to high density, miniaturized and high reliable direction. Therefore, FPC has been widely used in the fields of space, military, mobile communications, portable computers, computer peripherals, PDA, digital cameras and other fields and products.

FPC还具有良好的散热性和可焊性以及易于装连、综合成本较低等优点。

FPC also has the advantages of good heat dissipation and weldability, easy to connect, and low comprehensive cost.

柔性印刷线路板有单面、双面和多层板之分。所采用的基材以聚酰亚胺覆铜板为主。此种材料耐热性高、尺寸稳定性好,与兼有机械保护和良好电气绝缘性能的覆盖膜通过压制而成最终产品。双面、多层印制线路板的表层和内层导体通过金属化实现内外层电路的电气连接。

Flexible printed circuit boards are divided into single, double-sided and multi-layer plates. The base material used is polyimide copper clad plate. The material has high heat resistance, good dimensional stability, and the cover film, which has both mechanical protection and good electrical insulation properties, is made up of the final product by pressing. The surface and inner conductor of the double-sided and multilayer printed circuit board and the inner conductor are electralized to realize the electrical connection of the inner and outer circuits.

柔性线路板的功能可区分为四种,分别为引线路 、印刷电路 、连接器  以及多功能整合系统 ,用途涵盖了电脑、电脑周边辅助系统、消费性民生电器及汽车等范围

The functions of flexible circuit boards can be divided into four categories, they are lead circuits, printed circuits, connectors and multi-functional integration systems. They include computers, computers, auxiliary systems, consumer appliances and automobiles.

柔性线路板种类

Type of flexible PCB 

编辑

1、单面板

1, single panel

采用单面PI敷铜板材料于线路完成之后,再覆盖一层保护膜,形成一种只有单层导体的软性电路板。

A single layer of PI copper sheet material is used to cover a layer of protective film after the circuit is completed, and a soft circuit board with a single layer of conductor is formed.

2、普通双面板

2, common double-sided plate

使用双面PI板敷铜板材料于双面电路完成后,两面分别加上一层保护膜,成为一种具有双层导体的电路板。

After the double sided PI coated copper plate is used to complete the double-sided circuit, a layer of protective film is added to both sides to become a circuit board with double layer conductors.

3、基板生成单面板

3. The substrate is made of a single panel

使用纯铜箔材料在电路制程中,分别在先后在两面各加一层保护膜,成为一种只有单层导体但在电路板的双面都有导体露出的电路板。

In the process of circuit manufacturing, a protective film is added on both sides of the circuit with pure copper foil material. It becomes a single circuit conductor with only one conductor, but on both sides of the circuit board.

4、基板生成双面板

4. The substrate is made of two sides

使用两层单面PI敷铜板材料中间辅以在特定位置开窗的粘结胶进行压合,成为在局部区域压合,局部区域两层分离结构的双面导体线路板以达到在分层区具备高挠曲性能的电路板

The two layer single side PI copper clad material is supplemented by bonding glue with window opening at specific position. It becomes a double-sided conductor circuit board with partial separation in the local area and two layers in the local area. The circuit board with high flexural property in the layered area is achieved.

柔性线路板优缺点

Advantages and disadvantages of flexible PCB

编辑

1、优点:

1. Advantages:

(1)可以自由弯曲、卷绕、折叠,可依照空间布局要求任意安排,并在三维空间任意移动和伸缩,从而达到元器件装配和导线连接的一体化;

(1) it can be freely bent, folded and folded, and can be arranged according to the layout requirements of the space, and it can move and expand freely in 3D space, so as to achieve the integration of component assembly and wire connection.

(2)利用FPC可大大缩小电子产品的体积和重量;

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

(3)FPC还具有良好的散热性和可焊性以及易于装连、综合成本较低等优点,软硬结合的设计也在一定程度上弥补了柔性基材在元件承载能力上的略微不足。

(3) FPC also has the advantages of good heat dissipation and solderability, easy connection and low comprehensive cost. The design of soft and hard combination has made up for a slight lack of load bearing capacity of flexible substrates.

2、缺点:

2. Shortcomings:

(1)一次性初始成本高

(1) high one-time initial cost

由于软性PCB是为特殊应用而设计、制造的,所以开始的电路设计、布线和照相底版所需的费用较高。除非有特殊需要应用软性PCB外,通常少量应用时,最好不采用。

The soft PCB is designed for special application, manufacturing, so the circuit design, start wiring and photographic plate by the cost of higher. Unless there is a special need to apply soft PCB, it is best not to use a small amount of application.

(2)软性PCB的更改和修补比较困难

(2) it is difficult to change and repair soft PCB

软性PCB一旦制成后,要更改必须从底图或编制的光绘程序开始,因此不易更改。其表面覆盖一层保护膜,修补前要去除,修补后又要复原,这是比较困难的工作。

Soft PCB once made you want to change, must start from the map or the preparation of light painting program, so it is not easy to change. It is a difficult job to cover a layer of protective film on its surface, to remove it before repair, and to restore it after repair.

(3)尺寸受限制

(3) size is limited

软性PCB在尚不普及的情况下,通常用间歇法工艺制造,因此受到生产设备尺寸的限制,不能做得很长,很宽。

Soft PCB is usually made by batch process under the condition that it is not popular, so it is limited by the size of production equipment and can not be done very long and wide.

(4)操作不当易损坏

(4) improper operation and easy damage

装连人员操作不当易引起软性电路的损坏,其锡焊和返工需要经过训练的人员操作.

Connected due to improper operation caused by damage to the flexible circuit, the soldering and rework operation requires trained personnel.