What Are the Comprehensive Performances of Polytetrafluoroethylene PCB? Let PCB MASTER COMPANY Tell You

The scientific name of polytetrafluoroethylene is Teflon (Teflon PCB), which has excellent comprehensive performances. It is resistant to acids, alkalis and various organic solvents and is hardly soluble in all solvents. Meanwhile, polytetrafluoroethylene has the characteristic of high temperature resistance, and its dielectric constant is very low. Therefore, it is an ideal material for high-frequency PCBs.

 I. What Are the Comprehensive Performances of Polytetrafluoroethylene PCB?

- High temperature resistance: The long-term service temperature ranges from 200 to 260 degrees Celsius.

- Low temperature resistance: It remains soft at -100 degrees Celsius.

- Corrosion resistance: It can withstand aqua regia and all organic solvents.

- Weather resistance: It has the best aging life among plastics.

- High lubricity: It has the smallest coefficient of friction (0.04) among plastics.

- Non-stickiness: Among solid materials, it has the smallest surface tension and does not adhere to any substances.

In addition, it is physiologically inert and has excellent electrical performance, making it an ideal Class C insulating material.

Polytetrafluoroethylene PCB products are widely used in aerospace fields, satellite communications, radar, electronic countermeasures, the Beidou Satellite System and other fields.

I. What Is High - Frequency Polytetrafluoroethylene PCB?

With the rapid development of science and technology, many types of equipment are planned to be used in the microwave frequency band (> 1GHz) or even the millimeter - wave (30GHz) range. It can be seen that the frequencies are getting higher and higher, and the requirements for polytetrafluoroethylene (PTFE) PCB boards are also increasing. For example, the substrate needs to have high - quality electrical performance and chemical stability.  As the frequency of the power signal increases, the loss of the board is very small, and the importance of high - frequency PTFE PCB is becoming increasingly prominent.

High - frequency PTFE PCB refers to a PCB with a relatively high electromagnetic frequency used in high - frequency (frequency greater than 300MHz or frequency - band length not greater than 1m) and microwave (frequency greater than 3GHz or wavelength not greater than 0.1m) applications. It is a PCB produced on a microwave PTFE - clad copper plate using ordinary rigid circuit - board manufacturing methods or special processing methods. Generally speaking, high - frequency PTFE PCB can be regarded as a PCB with a frequency higher than 1GHz.

High - frequency PTFE PCB mainly has the characteristics of high - gain, high - signal - reception, wide - range, low - noise - figure, and high - stability.

Application Range of High - Frequency PTFE PCB:

1. Related to lighting and communication systems;

2. Power amplifiers, low - noise amplifiers, etc.;

3. Passive components such as power dividers, couplers, duplexers, filters, etc.;

4. In the fields of automotive anti - collision systems, satellite systems, and radio systems, high - frequency electronic equipment is a development trend.

II. Design and Solutions of Polytetrafluoroethylene PCB

The design of PTFE PCB mainly includes the following aspects:

1. Input

Both PTFE PCB and low - frequency power circuits have the effects of voltage gain and output - power collection. For a resonant differential - amplification circuit, it refers to the resonant frequency f0, and for a fiber - optic broadband differential - amplification circuit, it refers to a frequency range.

2. Pass - band

For a resonant differential - amplifier circuit, when the normalized amplitude of the resonant frequency f0 drops to 0.707, most pointers refer to the values between two corresponding frequencies; for a fiber - optic broadband amplifier circuit, it refers to the signal corresponding to a certain frequency.

3. Selectivity

This selectivity mainly targets resonant - amplifier circuits and characterizes the circuit's ability to select useful signals and suppress unnecessary signals. It is usually measured through the rectangular coefficient and the suppression ratio according to the resonant - characteristic curve of the circuit.

4. Noise - figure

When the amplifier circuit is working, due to certain factors, fluctuations will move irregularly, and noise will be formed inside the circuit, thus affecting the quality of the signal. This effect is usually described by the ratio of signal power PS to noise power PN (SNR). The noise - figure is the comparison between the input - signal noise and the output - signal noise.

5. Stability

The stability of high - frequency PTFE PCB refers to the stability of its main performance when the working state or working conditions change. For example, when the ambient temperature changes or the power - supply voltage fluctuates, it will affect the normal state of the DC operation of the amplifier circuit; the parameters of the circuit components will also change accordingly, which will lead to changes in the gain of the amplifier circuit, a sharp shift of the center frequency, and a sharp change in the resonant curve. Eventually, it may not work at all.

Regarding PTFE PCB, PCB MASTER Company has years of experience in handling it and has a good reputation. Usually, among PTFE PCBs, ordinary manufacturers seldom use high - frequency PTFE PCB. PCB MASTER Company can provide high - frequency PTFE PCB to meet various PCB needs of customers.

The products of PCB MASTER Company include PTFE - glass - fiber - cloth - clad copper plates, a series of ceramic - filled PTFE - glass - fiber - cloth - clad copper plates, a series of microwave composite - dielectric substrates, microwave multi - layer PTFE PCBs, microwave electronic devices and insulation, and anti - sticking varnished cloth, etc., which can meet the needs of multiple industries and are much cheaper, making it a very good choice for customers. At present, in the manufacturing of PTFE PCB by PCB MASTER Company, its materials can achieve pure compression of 4 - 6 layers and mixed compression of 4 - 8 layers.

Product Information

Product Name: Polytetrafluoroethylene PCB

Material: Polytetrafluoroethylene Laminated Material

Quality Standard: IPC6012 Class 2 or 3

Dielectric Constant: 2.0 - 3.5

Layers: 2 - 34 layers

Thickness: 0.1mm - 12mm

Copper Thickness: Base copper 0.5oZ, Finished - product copper thickness 1oZ

Surface Technology: Gold - plating

Special Requirements: High precision of radio - frequency lines, requirements for DK and DF of materials

Application: Microwave - high - frequency PCB applications.