TF440 High Frequency PCB Material Introduction TF440 laminate is a high-performance composite high-frequency PCB material belonging to the industry’s TF series, formulated with microwave and temperature-resistant polytetrafluoroethylene (PTFE) resin and ceramics, and it does not contain fiberglass cloth, a key characteristic that contributes to its stable electrical performance. As a core model in the TF series, TF440 copper clad laminate features a dielectric constant that can be precisely adjusted by controlling the ratio between its ceramic components and PTFE resin, ensuring it can meet the specific requirements of various high-frequency application scenarios. Equipped with special production processes, TF440 laminate exhibits excellent dielectric performance and high reliability, making it a reliable choice for high-frequency PCB manufacturing where signal integrity and long-term stability are critical. Consistent with the standard configurations of the TF series, TF440 high frequency laminate is available in three different variants to accommodate diverse application needs: TF, which refers to the smooth surface material without copper cladding, TF-1, which is the material with copper cladding on one side, and TF-2, which is the material with copper cladding on both sides, all while retaining its core advantages of excellent dielectric performance, high reliability, and precise dielectric constant adjustability derived from its PTFE and ceramic composite structure. TF series Product Features: The dielectric constant ranges from 3 to 16 and is stable. Common dielectric constants include 3.0, 6.0, 9.2, 9.6, 10.2, and 16, with low dielectric loss. Used for the fabrication of microwave and millimeter-wave printed circuit boards. Long-term working temperature is higher than TP materials and can be used in the range of -80°C to +200°C. Thickness options range from 0.635mm to 2.5mm. Resistant to radiation and low outgassing. Convenient for PCB processing, can be processed using methods suitable for thermoplastic materials. Product Models & Data Sheet The data sheet contains technical parameters and product features for the specified product models. Let's explore the details: Dielectric Constant: The dielectric constant is a measure of a material's ability to store electrical energy in an electric field. The test conditions vary based on the dielectric constant value. For dielectric constants ≤11, the test condition is 10GHz, while for dielectric constants >11, the test condition is 5GHz. The product models TF, TF-1, and TF-2 have different dielectric constant values as follows: TF300: 3.0±0.06 TF440: 4.4±0.09 TF600: 6.0±0.12 TF615: 6.15±0.12 TF920: 9.2±0.18 TF960: 9.6±0.19 TF1020: 10.2±0.2 TF1600: 16.0±0.4 It's worth noting that the dielectric constant can be customized within the range of 3.0 to 16. Tolerance of Dielectric Constant: The tolerance of the dielectric constant is specified based on the range. For dielectric constants ranging from 3.0 to 11.0, the tolerance is ±2%. For dielectric constants ranging from 11.1 to 16.0, the tolerance is ±2.5%. Loss Tangent: The loss tangent measures the dissipation of energy in a dielectric material. It is provided for different dielectric constant ranges and test conditions. The values are as follows: Dielectric Constant 3.0 to 9.5 at 10GHz: 0.0010 Dielectric Constant 9.6 to 11.0 at 10GHz: 0.0012 Dielectric Constant 11.1 to 16.0 at 5GHz: 0.0014 Dielectric Constant Temperature Coefficient: The dielectric constant temperature coefficient indicates the change in dielectric constant with temperature. It is provided for different dielectric constant ranges and temperature conditions. The values are expressed in parts per million per degree Celsius (PPM/℃). Here are the values: Dielectric Constant 3.0 to 4.5: -55ºC to 150ºC, -60 PPM/℃ Dielectric Constant 6.0 to 6.5: -55ºC to 150ºC, -210 PPM/℃ Dielectric Constant 9.0 to 11.0: -55ºC to 150ºC, -260 PPM/℃ Dielectric Constant 12.0 to 16.0: -55ºC to 150ºC, -205 PPM/℃ Peel Strength: Peel strength measures the strength of adhesion between layers of the product. The values are provided for two different states: 1 OZ Normal State: >0.6 N/mm 1 OZ After AC Humidity Test: >0.4 N/mm Volume Resistivity: Volume resistivity measures the resistance to electrical current through the volume of the material. The value in the normal state with a voltage of 500V is greater than 1×10^9 MΩ.cm. Surface Resistivity: Surface resistivity measures the resistance to electrical current across the surface of the material. The value in the normal state with a voltage of 500V is greater than 1×10^7 MΩ. Coefficient of Thermal Expansion (XY Z): The coefficient of thermal expansion indicates the change in size of the material with temperature. It is provided for different dielectric constant ranges and temperature conditions. The values are expressed in PPM/℃. Here are the values: Dielectric Constant 3.00 to 6.15: -55ºC to 150ºC, 60, 60, 80 PPM/℃ Dielectric Constant 6.16 to 11.0: -55ºC to 150ºC, 50, 50, 65 PPM/℃ Dielectric Constant 11.1 to 16.0: -55ºC to 150ºC, 40, 40, 55 PPM/℃ Water Absorption: Water absorption measures the amount of water absorbed by the material. The test is conducted at a temperature of 20±2℃ for 24 hours, and the value is reported to be ≤0.05%. Long-Term Operating Temperature: The long-term operating temperature range is tested in a high-low temperature chamber and spans from -80ºC to 200ºC. Material Composition: TF series PCB materials are composed of Polytetrafluoroethylene (PTFE), ceramic, and paired with ED copper foil. Product Technical Parameter Product Models & Data Sheet Product Features Test Conditions Unit TF TF-1 TF-2 Dielectric Constant When the dielectric constant is ≤11, the test condition is 10GHz. / 3.0±0.06 4.4±0.09 6.0±0.12 6.15±0.12 9.2±0.18 9.6±0.19 10.2±0.2 16.0±0.4 The dielectric constant can be customized within the range of 3.0～16 Tolerance of Dielectric Constant Dielectric Constant 3.0～11.0 / ±2% Dielectric Constant 11.1～16.0 / ±2.5% Loss Tangent Dielectric Constant 3.0～9.5 10GHz / 0.0010 Dielectric Constant 9.6～11.0 10GHz / 0.0012 Dielectric Constant 11.1～16.0 5GHz / 0.0014 Dielectric Constant Temperature Coefficient Dielectric Constant 3.0～4.5 -55 º~150ºC PPM/℃ -60 Dielectric Constant 6.0～6.5 -55 º~150ºC PPM/℃ -210 Dielectric Constant 9.0～11.0 -55 º~150ºC PPM/℃ -260 Dielectric Constant 12.0～16.0 -55 º~150ºC PPM/℃ -205 Peel Strength 1 OZ Normal State N/mm >0.6 1 OZ ?After AC Humidity Test N/mm >0.4 Volume Resistivity Normal State 500V MΩ.cm >1×10^9 Surface Resistivity Normal State 500V MΩ >1×10^7 Coefficient of Thermal Expansion Dielectric Constant 3.00～6.15 -55 º~150ºC PPM/℃ 60,60,80 Dielectric Constant 6.16～11.0 -55 º~150ºC PPM/℃ 50,50,65 Dielectric Constant 11.1～16.0 -55 º~150ºC PPM/℃ 40,40,55 Water Absorption 20±2℃, 24 hours % ≤0.05 Long-Term Operating Temperature High-Low Temperature Chamber ℃ -80～200ºC Material Composition Polytetrafluoroethylene (PTFE), ceramic, paired with ED copper foil. The density and thermal conductivity data for materials with different dielectric constants are as follows: Product Features Unit Dielectric Constant 3.0 4.4 6.0 6.15 9.2 9.6 10.2 16.0 Density g/cm3 2.41 2.58 2.78 2.79 3.0 3.02 3.07 3.27 Thermal Conductivity W/(M.K) 0.30 0.32 0.45 0.46 0.66 0.68 0.7 0.75 A TF Laminate and Applications Displayed on the screen is a TF high-frequency laminates. TF high-frequency PCB materials are utilized in applications of microwave and millimeter-wave printed circuit boards, such as millimeter-wave radar sensors, antennas, transceivers, modulators, multiplexers, as well as power supply equipment and automatic control equipment.
When the dielectric constant is >11, the test condition is 5GHz.
(XY Z)
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