FFC&FPC

FFC finished product image

The full English name of FFC is Flexible Flat Cable

It is a new type of data cable made of PET insulation material and ultra-thin tinned flat copper wire, which is pressed by high-tech automated production lines. It has the advantages of softness, flexible bending and folding, thin thickness, small volume, simple connection, easy disassembly, and easy solution to electromagnetic shielding (EMI). You can freely choose the number and spacing of wires, making wiring more convenient, greatly reducing the volume of electronic products, reducing production costs, and improving production efficiency. It is most suitable for use as a data transmission cable between mobile components and motherboards, between PCB boards and PCBs, and in miniaturized electrical equipment. Common specifications include flexible cable cables with various spacing, such as 0.5mm, 0.8mm, 1.0mm, 1.25mm, 1.27mm, 1.5mm, 2.0mm, 2.54mm, etc.

At present, it is widely used for the connection between various printer print heads and motherboards, as well as the signal transmission and board connection of products such as plotters, scanners, copiers, speakers, LCD appliances, fax machines, and various DVD players. In modern electrical equipment, it is almost non-existent.

FFC in our country was first introduced from Japan. The first batch of FFC equipment consisted of three units, which were owned by Yingke Cable Factory in Guilin City at that time. Yingke Cable Factory was a state-owned enterprise at that time, but due to various reasons, it did not grow. Later, some enterprises in Guangdong continued to develop, and the prospects of FFC are still promising, because many electronic products today use it.

Main differences from FPC:

FPC is a flexible print circuit flexible printed circuit,

From their manufacturing perspective, the way their circuits are formed is different:

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

FFC uses two layers of insulating foil with flat copper foil sandwiched between them, resulting in a simpler and thicker finished product

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

Common specifications for FFC flexible ribbon cables in the industry:

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

Number of spacing screens, total length model S1/S2: peeling length S3/S4: reinforcement plate length, conductor thickness, conductor width

Pitch Pins Total Type Strip Length Supporting Tape Conductor Conductor

Length Length Thickness Width

For example: 0.5 × forty-five × three hundred × A (4/4/8/8) (0.035 × 0.30) represents a spacing of 0.5mm, 45 positions, a total length of 300mm, in the same direction, with a wire mouth of 4mm at both ends and a reinforcement plate length of 8mm. FFC flexible ribbon cables with copper wire specifications of 0.035 * 0.30 are used, and this specification is mainly applicable to LCD liquid crystals.

FFC flexible flat cable model (TYPE) diagram:

FFC model diagram

The commonly used models are as follows:

Type A: Connect both ends and stick the reinforcing plate onto the insulating tape;

Type B: The reinforcing plate is directly pasted onto the insulation tape by crossing it;

Type C: The reinforcement plates at both ends are directly pasted onto the conductor;

D-type: The reinforcing plates at both ends are directly pasted onto the conductor by crossing and pasting them directly;

E-type: One end of the reinforcing plate is pasted on the insulating tape, and the other end is directly soldered;

F-type: The reinforcement plates at both ends are directly attached to the insulation tape, with half of the inside peeled off;

G-type: Both ends are soldered directly.

FFC technical parameters:

Number of conductors N: The number of copper wire conductors in the ribbon;

Distance P: The distance between the centerline of two adjacent conductors?

FFC technical parameters

Edge distance M: The distance between the centerline of the outermost conductor and the edge of the ribbon:

Full spacing 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: The distance between the two ends of the cable;

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