PCB News - The importance of choosing high-frequency materials

The importance of choosing high-frequency materials

With the advancement of electronic design technology and manufacturing process, electronic products are gradually developing towards high density, high functionality, lightness and thinness, and high transmission rate; coupled with the rapid development of chip miniaturization and the increase in the number of data transmissions, The operating frequency of the system is getting higher and higher. To become an excellent electronic product, it requires not only excellent circuit design, but also good manufacturability, because good manufacturability can reduce the problems that occur during mass production of the product, shorten the development schedule of the product, and reduce the design cost. So as to achieve the purpose of improving product competitiveness. Therefore, the choice of circuit boardmaterials for product design engineers is particularly important when designing electronic products.

When the working frequency of the circuit is in the radio frequency band, the range of plates that the design engineer can choose will be greatly reduced. The special formula of Rogers RO4835 high-frequency sheet improves the oxidation resistance. Long-term use at a certain temperature, it can provide particularly stable electrical properties, while maintaining the same processing advantages as FR4 thermosetting resin materials. At the same time, like the Rogers RO4350B high-frequency board, the dielectric constant (Dk) is 3.48 at 10GHz, the dielectric loss (Df) is 0.0037, and it has a low Z-axis thermal expansion coefficient (CTE), ensuring that it can be used in various processing and operating conditions Reliability of lower metal vias. The X-axis and Y-axis expansion coefficients of this material are similar to copper, and it has excellent dimensional stability.

With the development of communication technology from 2G, 2.5G to 3G, and the current 4G, the data transmission throughput is increasing, the bandwidth required is getting wider and the frequency is getting higher and higher; the miniaturization of equipment is also the future development trend First, once the device becomes smaller, the PCB needs to have a higher heat conductivity and a higher dielectric constant. High-frequency circuit board materials are mainly used in high-power amplifiers, base station antennas, global positioning systems, weather radars and weather satellites, and automotive radars and sensors.

The main parameters of circuit board materials are Dk and Df. In the circuit board used in high frequency, the stability of the Dk value is the guarantee of the reliability of the board; the Df value should be as small as possible to reduce signal loss. In addition, some high-frequency plates are also used in some high-speed, large-scale data transmission systems.

iPCB is a high-tech manufacturing enterprise focusing on the development and production of high-precision PCBs. iPCB is happy to be your business partner. Our business goal is to become the most professional prototyping PCB manufacturer in the world. Mainly focus on microwave high frequency PCB, high frequency mixed pressure, ultra-high multi-layer IC testing, from 1+ to 6+ HDI, Anylayer HDI, IC Substrate, IC test board, rigid flexible PCB, ordinary multi-layer FR4 PCB, etc. Products are widely used in industry 4.0, communications, industrial control, digital, power, computers, automobiles, medical, aerospace, instrumentation, Internet of Things and other fields.