FR 4 substrate material is a kind of substrate material widely used in electronic PCB products | |
Great PCB is a circuit board supplier and offers PCB fabrication assembly service, we will deeply explore the parameters of FR 4 substrate materials, Including dielectric constant, thermal expansion coefficient, glass transition temperature, and electrical breakdown strength. To help understand the properties of FR 4 substrate materials and their important role in electronic products. 1、dielectric constant The dielectric constant is one of the important parameters to measure the electrical insulation properties of materials. For the FR 4 substrate material, its dielectric constant determines the propagation speed and wavelength of the electromagnetic wave in the material for the PC board. The smaller the dielectric constant, the faster the frequency of the electromagnetic wave in the material. When the dielectric constant of FR 4 substrate material approaches 1, This value is very important for circuit board designers. the impedance matching performance is better, which can improve the speed and quality of signal transmission. 2、thermal expansivity The thermal expansion coefficient is one of the key parameters to measure the length change of materials under temperature change. For the FR 4 substrate material, the thermal expansion coefficient determines whether the deformation will occur under the temperature change, which affects the stability and reliability of the electronic products. Reasonable control of the thermal expansion coefficient of the FR 4 substrate material can avoid the stress concentration and the mismatch between the components caused by the temperature change. 3、glass-transition temperature The glass transition temperature is the critical temperature of the material transition from the glassy to the solid state. For the FR 4 substrate materials, the glass transition temperature determines the mechanical properties and insulation prope | |
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| Target State: All States Target City : London Last Update : Sep 02, 2024 5:34 AM Number of Views: 43 | Item Owner : Coco Yang Contact Email: Contact Phone: +86 17371507079 |
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