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Line Width : 3MIL ;

Line Spacing : 3MIL ;

Drilling Diameter : ≥ 0.1mm ;

Surface Technology : Gold deposition, Gold plating, Tin spraying, OSP ;

Processing Size : 600 * 1200mm ;

Plate Thickness : 0.1-10mm ;

Processing Layers : 2-36 layers.

Special Process : Thick gold plate, ultra thick plate, depth control drilling, back drilling, hole filling electroplating, copper slurry plug hole, mechanical blind hole, etc.

Surface Treatment Processes : Include OSP, gold precipitation, silver precipitation, tin precipitation, gold plating, pure gold plating, thick gold plating, nickel palladium gold plating, nickel plating, tin plating, tin spraying, etc.


F4B: The full name is polytetrafluoroethylene F4B high frequency antenna plate. It has excellent comprehensive performance, corrosion resistance, high (low) temperature resistance, aging resistance, high insulation, high lubrication, non-adhesion, non-toxic. Widely used in aviation, chemical, electronics, bridge, textile, machinery, paper and ceramics and other industries.

The dielectric constant of F4B sheet refers to the dielectric properties of the material under the action of the electric field, that is, the ratio of the electric field strength to the potential shift. F4B sheet is a high-performance polytetrafluoroethylene material, with excellent corrosion resistance, high temperature resistance, abrasion resistance and insulating properties, and therefore widely used in the field of electronics, chemical industry, aerospace and so on.

The dielectric constant of F4B sheet is one of the important indicators of its insulating properties. The smaller the dielectric constant, the better the insulating properties of the material, F4B sheet dielectric constant between 21-2.3, much lower than the general polymer materials, so it has excellent insulating properties. Under high frequency electric fields, the dielectric constant of F4B sheet is even lower, which can effectively reduce the interference and loss of electromagnetic waves to ensure the stability and reliability of electronic equipment.


In addition to insulating properties, F4B sheet dielectric constant also affects its application in the field of microwave microwave signals in the transmission process will be affected by the medium, the smaller the dielectric constant, the faster the signal transmission speed, the smaller the transmission loss. Therefore, the low dielectric constant of F4B sheet makes it an ideal material for microwave circuits, antennas, filters and other microwave devices.

The dielectric constant of F4B sheet is one of the important indexes of its insulation and microwave performance.

Low dielectric constant makes it has excellent insulation properties and microwave performance, widely used in electronics, chemical industry, aerospace and other fields. With the continuous development of science and technology, the dielectric constant of F4B sheet will continue to be optimized to provide better support for the development of various industries.

Features of F4B PCB

A. High Temperature Resistance

F4B circuit boards are made of PTFE material, PTFE has a very high temperature resistance, to ensure the normal operation of the circuit in extreme environments. F4B circuit boards are able to work normally at temperatures up to 200 ℃, while the temperature resistance of ordinary circuit boards is generally only about 120 ℃, so F4B circuit boards have obvious advantages in the application of high temperature environments.

B. Low Dielectric Constant and Dielectric Loss

The dielectric constant of F4B circuit boards is less than 2.65, which means that it has a very low dielectric loss and signal distortion, and can perform better in high-speed transmission and high-frequency operation and other complex occasions. In contrast, the dielectric constant of traditional FR4 circuit boards is generally between 4.6 and 5.5, resulting in more serious signal loss and attenuation, which limits the application of the boards.


C. Superior Mechanical Performance

F4B circuit boards also have a very good performance in mechanical strength, due to the F4B circuit boards using a multi-layer structure and a combination of special materials, making it extremely high strength and rigidity, can withstand a variety of vibration and shock test. In addition, F4B circuit boards also have the ability to prevent folding and impact, more to ensure that the board stable operation.

D. Good Flame Retardant Properties

F4B circuit boards are made of PTFE, in addition to high temperature resistance, but also has a very good flame retardant properties. In some special environments, fire-resistant materials are necessary, ordinary circuit boards are often easy to catch fire, which will pose a great threat to equipment and personal safety. The flame retardant properties of F4B circuit boards can protect equipment and personal safety and prevent fire accidents.


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