PCB Technical - High frequency circuit board and FR4 optical board

High frequency circuit board introduction
High-frequency circuit board refers to a special circuit board with a higher electromagnetic frequency, which is used for high frequency (frequency is greater than 300MHZ or wavelength. Generally speaking, high-frequency board can be defined as a circuit board with a frequency above 1GHz. The substrate material needs to have excellent electrical properties., Good chemical stability, with the increase of the power signal frequency, the loss on the substrate is very small, so the importance of high-frequency plates has emerged.

PCB high-frequency board High-frequency circuit boards with induction heating technology have been widely used in the communication industry, network technology field promotion and high-speed information processing systems, meeting the requirements of many high-precision parameter instruments. Reliable high-frequency circuit boards provide great help in actual production.

The advantages of high-frequency circuit boards
One, high efficiency

High-frequency circuit boards with low dielectric constant will have very low loss, and advanced induction heating technology can achieve the target heating requirements with very high efficiency. Of course, while focusing on efficiency, it also has the characteristics of environmental protection, which is very suitable for the development direction of today's society.

Two, fast

The transmission speed is inversely proportional to the square root of the dielectric constant, which means that the smaller the dielectric constant, the faster the transmission speed. This is the advantage of the high-frequency circuit board. It uses special materials, which not only guarantees the low dielectric constant, but also maintains the stable operation, which is very important for signal transmission.

Three, the degree of control is large

It is widely used in high-frequency circuit boards that require precision metal material heating treatment in various industries. In the process of its field, not only can heating of different depth components, but also focus on heating according to local characteristics, whether it is surface or deep level., Centralized or decentralized heating methods can be easily completed.

Fourth, strong tolerance

The dielectric constant and medium have certain requirements on the environment, especially in the south, where wet weather will seriously affect the use of circuit boards. High-frequency circuit boards made of materials with extremely low water absorption can challenge such an environment. At the same time, they also have the advantages of resistance to chemical corrosion, moisture resistance, high temperature resistance, and great peel strength, allowing high-frequency circuit boards to exert powerful performance .

FR4 light board introduction
FR4 board, friends who first heard of this professional name may not have any impression of it. In fact, it is a number of flame-resistant material grades, which means that the resin material must be able to extinguish itself after being burned. It can be seen that the flame resistance of the product is relatively good. If there is an emergency fire or other problems, we don't have to worry about it causing the fire to spread.

FR-4 light board, a type of substrate with epoxy resin as adhesive and electronic grade glass fiber cloth as reinforcement material.

Performance: The mechanical properties, dimensional stability, impact resistance and humidity resistance of epoxy glass fiber cloth substrate are higher than that of paper substrate. The electrical performance is excellent, the working temperature is high, and its performance is not affected by the environment. In terms of processing technology, it has great advantages over other resin glass fiber cloth substrates.

FR4 light board actually refers to the base material without copper clad, which is mostly used on some backing boards.

Introduction to circuit boards
Circuit board, also known as printed circuit board, is an important electronic component, a support for electronic components, and a carrier for electrical connection of electronic components. Because it is made by electronic printing, it is called a "printed" circuit board.

The number of circuit boards can be divided into single-sided, double-sided, four-layer, six-layer and other multilayer circuit boards.

Summary: FR4 is a substrate without copper clad, while a circuit board is a substrate with copper clad and then processed into a circuit board.