Rogers PCB Material Dielectric Constant
The dielectric constant is the main parameter that reflects the dielectric or polarization properties of piezoelectric smart materials under the action of an electrostatic field. It is commonly used ε to represent. The dielectric constant (Dk) or relative dielectric constant of a PCB material is not a constant. The dielectric constant is an indispensable factor in PCB impedance design, referring to the ability of vacuum-enhanced materials to store energy, which belongs to the inherent electrical characteristics of the material itself.
Rogers high-frequency board RO4350B is a patented hydrocarbon resin system/ceramic filler material reinforced with woven glass cloth. Its electrical properties are very similar to PTFE/woven glass cloth materials and its processability is similar to epoxy resin/glass cloth materials. Rogers RF board RO4350B can use standard epoxy resin/glass cloth processing technology while providing strictly controlled dielectric constant and loss, while its price is a fraction of that of traditional microwave materials. There is even no need for special through hole pretreatment or operating procedures such as PTFE-based microwave materials. Rogers RF board material RO4350B has passed the UL94V-0 fire rating necessary for active equipment and high- voltage RF design.
The corresponding table of Rogers PCB material and dielectric constant is as follows：
Different applications of piezoelectric components have different requirements for the dielectric constant of piezoelectric smart materials. When the shape and size of piezoelectric smart materials are fixed, the dielectric constant ε. It is determined by measuring the intrinsic capacitance CP of a piezoelectric smart material. In the past decade, the research on low- dielectric constant materials has been increasing in the semiconductor industry, and the types of materials are also diverse. However, the speed at which these low dielectric constant materials can be applied in integrated circuit production processes is far from being as fast as people imagine. The main reason is that many low-dielectric constant materials cannot meet the requirements of integrated circuit process applications. The polarity of polymer materials can be determined based on the dielectric constant of the material. Generally, substances with a relative dielectric constant greater than 3.6 are polar substances; Substances with a relative dielectric constant in the range of 2.8 to 3.6 are weakly polar substances; A nonpolar substance with a relative dielectric constant less than 2.8 is considered a nonpolar substance.
The Rogers series including RO4350B has the advantages of being designed for performance-sensitive mass applications, low dielectric constant tolerance, and low loss; Excellent electrical performance; Allowing higher application frequency; Ideal for broadband applications with stable electrical characteristics; Excellent dimensional stability; Reliable electroplated through-hole; Control impedance transmission line; Easy to mass produce; Easy to mass production.