Under the condition of frequency change, the DK and DF values of general type PCB substrate material show a significant change. The DK value of general type epoxy-glass fiber cloth based substrate material (general type FR 408hr) at 1 MHz frequency is 4.7, while the DK value at 1 GHz frequency is 4.19. Above 1GHz, its DK value changes gradually. The trend is for the DK value to decrease with the increase of frequency, although not significantly. When choosing high-speed PCB materials, it is important to consider the manufacturability of the PCB and various properties that match the product.
FR 408HR is a high-frequency and high-speed PCB material that is dense and durable, making it ideal for manufacturing printed circuit boards. This material consists of an epoxy resin core with copper and aluminum metal plating, and is coated with aluminum on the surface. FR 408HR has a low thermal expansion coefficient, allowing it to effectively control temperature stress and ensure component performance stability. It is commonly used for high frequency power distribution and circuit boards for CPUs, switches, and connectors, as well as for RF PCB assemblies due to its sensitivity to electromagnetic waves.
Rogers PCB material also offers excellent dielectric integrity and is designed for high-performance RF circuit boards. Its outstanding electrical and thermal stability make it suitable for exposure to extreme temperatures and vibrations in harsh environments.
The FR 408HR laminate is made with high-performance multi-functional resin and electrical grade (E-glass) glass fiber fabric, providing increased Z-axis expansion and 25% more electrical bandwidth compared to other products in the field. These characteristics, combined with superior moisture resistance during reflow soldering, enhance the overall quality of the PCB in terms of heat and electricity.
Glass fiber reinforced materials play a crucial role in providing mechanical strength in composite materials. The dielectric constant of glass fiber is generally higher than that of the resin matrix, and it significantly influences the dielectric properties of composite materials. Traditional E-glass fiber cloth has been commonly used in FR-4 copper clad plates, but its high dielectric constant (6.6) hinders its application in high-frequency and high-speed fields.
Alkali-free glass fibers, such as D glass fiber (DK=4.7, 1MHz) and Q glass fiber (DK=3.9, 1MHz), offer excellent dielectric properties but are costly and have poor machinability. A combination of different types of glass fibers can be used to achieve both low dielectric properties and processing features, addressing the cost issue in industrial production of fr408hr.
FR 408HR is a high-frequency and high-speed PCB material that is dense and durable, making it ideal for manufacturing printed circuit boards. This material consists of an epoxy resin core with copper and aluminum metal plating, and is coated with aluminum on the surface. FR 408HR has a low thermal expansion coefficient, allowing it to effectively control temperature stress and ensure component performance stability. It is commonly used for high frequency power distribution and circuit boards for CPUs, switches, and connectors, as well as for RF PCB assemblies due to its sensitivity to electromagnetic waves.
Rogers PCB material also offers excellent dielectric integrity and is designed for high-performance RF circuit boards. Its outstanding electrical and thermal stability make it suitable for exposure to extreme temperatures and vibrations in harsh environments.
The FR 408HR laminate is made with high-performance multi-functional resin and electrical grade (E-glass) glass fiber fabric, providing increased Z-axis expansion and 25% more electrical bandwidth compared to other products in the field. These characteristics, combined with superior moisture resistance during reflow soldering, enhance the overall quality of the PCB in terms of heat and electricity.
Glass fiber reinforced materials play a crucial role in providing mechanical strength in composite materials. The dielectric constant of glass fiber is generally higher than that of the resin matrix, and it significantly influences the dielectric properties of composite materials. Traditional E-glass fiber cloth has been commonly used in FR-4 copper clad plates, but its high dielectric constant (6.6) hinders its application in high-frequency and high-speed fields.
Alkali-free glass fibers, such as D glass fiber (DK=4.7, 1MHz) and Q glass fiber (DK=3.9, 1MHz), offer excellent dielectric properties but are costly and have poor machinability. A combination of different types of glass fibers can be used to achieve both low dielectric properties and processing features, addressing the cost issue in industrial production of fr408hr.
