FFC (Flexible Flat Cable)

- Mar 13, 2020-

Product Description

Flexible Flat Cable (FFC) can choose the number and spacing of wires arbitrarily, make the connection more convenient, greatly reduce the volume of electronic products, reduce production costs, improve production efficiency, most suitable for moving parts and motherboards, PCB boards It is used as a data transmission cable between PCB boards and in miniaturized electrical equipment. The common specifications are 0.5mm, 0.8mm, 1.0mm, 1.25mm, 1.27mm, 1.5mm, 2.0mm, 2.54mm and other flexible cables.


Main Application

At present, it is widely used in the connection between various printer printheads and motherboards, signal transmission and board connection of plotters, scanners, copiers, stereos, LCD appliances, fax machines, various video players and other products. It is almost everywhere in modern electrical equipment.

China's FFC was first introduced from Japan. The first batch of FFC equipment was 3, which was owned by Yinglin Cable Factory of Guilin at that time. Yingke Cable Factory was a state-owned enterprise at the time. However, it failed to grow due to various reasons. Some companies continue to develop, so far the prospect of FFC is still promising, because many electronic products today will use it.

The main differences from FPC:

FPC is Flexible Printed Circuit.

From the point of view of their manufacturing, the way they form their lines is different:

1 FPC is a flexible circuit board with different single-sided, double-sided, and multi-layer structures obtained by processing FCCL (flexible copper-clad foil) by chemical etching.

2 FFC is a flat copper foil sandwiched between the upper and lower layers of insulating foil.The finished product is simpler and thicker.

In terms of price, naturally FFC is much cheaper. Considering production costs, more companies prefer to use FFC-related designs

FFC flexible cable industry general specifications description:

P × N × TL × TYPE × (S1 / S2 / S3 / S4) (CT × CW)

Pitch Number of screens Total length Model S1 / S2: Peel length S3 / S4: Reinforcing board length Conductor thickness Conductor width

Pitch Pins Total Type Strip Length Supporting Tape Conductor Conductor

Length Length Thickness Width

For example: 0.5 × 45 × 300 × A (4/4/8/8) (0.035 × 0.30), which means 0.5mm pitch, 45 positions, total length of 300mm, same direction, 4mm at both ends, reinforcing plate The length is 8mm, and the FFC flexible cable with a copper wire specification of 0.035 * 0.30 is used, and this specification is mainly applicable to the LCD.

Common Models

Type A: The two ends are connected and the reinforcing plate is pasted on the insulation tape;

Type B: the reinforcing plate is directly pasted on the insulation tape in the cross;

Type C: The reinforcing plates at both ends are directly attached to the conductor;

Type D: The reinforcing plates at both ends are directly attached to the conductor at the intersection;

Type E: one end of the reinforcing plate is attached to the insulating tape, and the other end is directly soldered;

Type F: The reinforcing plates at both ends are directly attached to the insulating tape, and the inner half is peeled off;

Type G: Solder directly at both ends.


FFC technical parameters:

Number of conductors N: the number of copper conductors in the cable;

Pitch P: the distance between the centerlines of two adjacent conductors;

ffc technical parameters

ffc technical parameters

Margin M: The distance from the outermost conductor centerline to the edge of the cable:

Full distance TP: the distance between the centerlines of the two outermost conductors, TP = P * (N-1);

Total width W: the distance between the two edges of the cable, W = P * (N + 1);

Total length TL: distance between two ends of the cable;

Insertion thickness TT: thickness of two connecting ends of the cable;

Flexible flat flexible cable:

①PITCH (Pitch): 0.5mm 0.8mm 1.0mm 1.25mm 1.27mm 2.0mm 2.54mm

② Conductor specifications: 0.035 * 0.030, 0.035 * 0.65, 0.05 * 0.5, 0.05 * 0.065, 0.1 * 0.65, 0.1 * 0.8;

③ Number of wiring screens: 2P-120P;

④ Cable length: 15mm-Nm;

Two types of adhesive film are commonly used:

① Rated voltage and temperature 60V 80 ℃ AWM 20624 80C 60V VW-1

② Rated voltage and temperature 60V 105 ℃ AWM 20624 105C 60V VW-1