Material Classification——Electrical Properties Material Parameters——Lead-free (Application status: A-...
物理性能 Physical Properties 1 密度Density g/cm GB/T5130 ≥1.8 2 玻璃纤维含量 Glass Fibre Content % —— ≥60 3 吸水性(10mm) Water Obsorption mg GB/T5130 ≤34 4 热膨胀系数 Thermal Expansion Coefficient 1/℃ GB/T1036 11.1×10 5 导热系数 Coefficient of Heat Conductivity w/m.k —— ...
物理性能 Physical Properties 1 密度Density g/cm GB/T5130 ≥1.8 2 玻璃纤维含量 GlassFibreContent % —— ≥60 3 吸水性(10mm) WaterObsorption mg GB/T5130 ≤34 4 热膨胀系数 Thermal Expansion Coefficient 1/℃ GB/T1036 11.1×10 5 导热系数 Coefficient of Heat Conductivity w/m.k —— 0.46 ...
物理性能 Physical Properties 1 密度Density g/cm GB/T5130 ≥1.8 2 玻璃纤维含量 GlassFibreContent % —— ≥60 3 吸水性(10mm) WaterObsorption mg GB/T5130 ≤34 4 热膨胀系数 Thermal Expansion Coefficient 1/℃ GB/T1036 11.1×10 5 导热系数 Coefficient of Heat Conductivity w/m.k —— 0.46 ...
High Tg resin variants improve temperature resistance but have reduced shock/vibe tolerance. Standard FR4 offers good combined thermal, mechanical, electrical properties. Q: Does moisture absorption change FR4 substrate characteristics? Slightly. Standard FR4 absorbs more moisture which can increase loss ta...
Poisson's ratio is related toother material properties, such as Young's modulus and the shear modulus. For isotropic materials, the following relationship holds: ν = (E/2G) 1。 where: E is Young's modulus. G is the shear modulus. 影响因素。 Poisson's ratio can be affected by a numbe...
Performance: The mechanical properties, dimensional stability, impact resistance and moisture resistance of the epoxy fiberglass substrate are higher than those of the paper substrate. Its electrical performance is excellent, its operating temperature is high, and its performance is less affected by the ...
Due to the composition, for example, the material properties in terms of water absorption, melting temperature or dielectric constant can vary depending on the variant or supplier.Applications of FR4 Due to their characteristics, such as very good thermal and short-circuit resistance as well as ...
Emerging technology has called for higher-performance properties for FR4 and 100% difunctional epoxy systems are not capable of meeting these properties for most applications.JorgensonProtectChrisProtectEBSCO_AspElectronic EngineeringJorgenson, C., "Is FR4 Running Out of Gas?" Printed Circuit Design, ...
Each of the SAR values presented in the following tables (3-6), consists of three different antenna substrates, namely FR4, Rogers RO3006 (loss free), and Rogers RO4003 (loss free) with variations of dielectric properties of head. Effects of electromagnetic absorption towards human head due to...