Introduction of Flexible Printed Circuit Board
The PCB involved in the above mentioned application products are all rigid boards. Of course, there are also some applications that require special flexible material PCB.
FlexiblePrintedCircuit board (FPC), also known as flexible circuit board and flexible circuit board, is very popular for its light weight, thin thickness, free bending and folding.
Flexible Circuit (FPC) is a technology developed by the United States in the 1970s for the development of space rocket technology. It is a highly reliable and highly flexible printed circuit made of polyester film or polyimide. By embedding circuit design in a flexible thin plastic sheet, a large number of precision components are stacked in narrow and limited space, thus forming a flexible circuit. This kind of circuit can be bent at will, with light folding weight, small volume, good heat dissipation and convenient installation, breaking through the traditional interconnection technology. In the structure of flexible circuit, the materials are insulating film, conductor and adhesive.
Advantages and disadvantages
Advantages: high assembly density, small volume, light weight, reduced connection between components (including parts) under high-density assembly, thus increasing reliability; Can increase the wiring layer, and then increase the design flexibility; Can also form the impedance of the circuit, can form a certain high-speed transmission circuit, can set the circuit, electromagnetic shielding layer, can also install a metal core layer to meet the special thermal insulation and other functions and requirements; Easy installation and high reliability.
Disadvantages: high cost and long cycle; High reliability test methods are required.
It is mainly concentrated on high-precision electronic instruments and so on, even in aerospace and national defense.