Rogers is a brand of laminates used to make circuit boards. These are made by Rogers. The company provides advanced PCB materials for many manufacturers and is popular among many manufacturers because of its powerful functions. The flame retardant 4 (FR4) material for PCB substrate has many advantages, such as wide range of dielectric constant and low signal loss. They provide better thermal resistance in harsh application environments. Rogers printed circuit board is widely used in the equipment and system of key mission applications such as national defense and aviation.
Due to the increase in usage, it is easy to find Rogers PCB manufacturers that specialize in making circuit boards with Rogers materials. Unlike other standard materials, there are certain things to keep in mind when choosing Rogers materials for printed circuit boards. This article focuses on the factors that should be considered when purchasing Rogers materials and the beneficial functions of the Rogers 4350 in PCB.
Although experienced Rogers PCB manufacturers will guide you to use the best Rogers substrate, it is important to know your application requirements. In addition, you can choose the right Rogers material based on a number of other factors:
Thermal expansion coefficient: according to the principle of material expansion when heated, PCB materials will expand when exposed to a certain temperature. Usually, they expand when the temperature exceeds the set glass transition temperature. The rate at which they expand beyond this temperature is called the coefficient of thermal expansion, expressed in parts per million (PPM).
Dielectric constant: stable dielectric constant is very important, especially in high frequency applications. Dielectric constant is basically the amount of charge stored in the PCB material, and a higher value leads to a higher capacitance and increases the voltage across the PCB. The dielectric constant of Rogers 4350b is 3.66, so it is very suitable for microwave point-to-point links.
Hygroscopic: ideally, even if immersed in water, the material should not absorb any moisture; however, this is very unrealistic. But it is important to minimize the moisture absorption. Most materials used for PCB have moisture absorption between 0.01% and 0.2%. Materials with low absorptivity will have better thermal and electrical properties.
Decomposition temperature: the maximum and minimum temperature that PCB can withstand should be determined according to the application, and the correct materials should be used for corresponding design. If there is any possibility that the temperature exceeds its upper limit, there should be a reverse mechanism. Otherwise, the PCB will decompose and lose a certain proportion of the mass. For most applications, the ideal upper limit temperature is 350 ℃. The decomposition temperature should be set outside this range.
More information about Rogers 4350 and its use in the manufacture of complex and robust PCBs
Rogers PCB 4350 material is mainly hydrocarbon or glass fiber reinforced ceramic material, and its treatment conforms to FR4 standard. The Rogers 4350 helps to improve the insulation strength and does not require special tools or through-hole technology to install components such as PTFE materials. In the long run, they are cost-effective and UL 94 V-0 certified for high-power RF designs and active devices. They have excellent dimensional stability. Here are some of the core features of the Rogers 4350:
- Their DK was 3.48 + / – 0.05.
- Their z-axis thermal expansion coefficient is low, which is 32 ppm / C.
- They have a low loss factor of 0.0037 at 10 GHz.