The characteristics of FPC flexible circuit board

Polyimide or polyester film as the backing material is made of a kind of highly reliability,
The perfect flexible printed circuit board. With the high density of wiring, light weight, thin thickness, good bending sexual characteristics.

A, FPC flexible circuit board bending and reliability

Ruixing fast now FPC flexible printed circuit board production are: single side, double side, multi-layer flexible plate and flexible plate just four.

Single-sided FPC flexible plate is the lowest cost, when the PCB for electrical demand is not high. When single wiring, should choose single flexible plate.
It has a layer of chemical etching of conductive graphics, in the flexible conductive graphics layer on the surface of the insulating substrate for rolled copper foil.
Insulating substrate can choose polyimide, polyethylene terephthalate, aromatic polyamide fiber resin and PVC.

Double-sided FPC flexible plate is on the two sides each have a layer of insulating base film etching made of conductive graphics. Hole metallization connects to both sides of the insulation materials graphic form a conductive path,
In order to meet the deflection design and use of the function. While covering film can protect the single and double wires and components placed.

Multilayer FPC flexible plate is a level 3 or more layers of single sided or double sided FPC flexible circuit board laminated together, through drilling,
Electroplating metallized hole formation, the formation of a conductive path between different layers. Multilayer circuit has higher reliability, better thermal conductivity and more convenient assembly performance has the function of the huge difference.
When designing the layout, assembly shall be taken into consideration, layer number and size of flexible influence each other.

Traditional just flexible plate is made from rigid and flexible substrate has a choice of formation pressure together. Structure closely to metallization away L form electrical connection.
If a PCB is, opposite element, just flexible plate is a good choice. But if all the components are on one side, selects the double flexible plate,
And on the back of the laminated layer on FR4 reinforced material, will be more economic.

Mixed structure of FPC flexible circuit board is a kind of laminated panel, conductive layer made of different metals. A eight layer plate using FR - 4 as inner medium,
Using polyimide as the outer medium, lead out from three different direction of the motherboard, each lead made of different metals. Constantan alloy, copper and gold as independent lead, respectively.
This kind of hybrid structure is mostly used in electrical signal conversion and is quite harsh relationship and performance of heat transformation of low temperature circumstances, is the only feasible solution.