For special circuit boards with higher electromagnetic frequency, generally speaking, high frequency can be defined as a frequency above 1GHz. Its various physical properties, accuracy, and technical parameters require very high requirements, and are often used in automotive anti-collision systems, satellite systems, radio systems and other fields.

　　High frequency circuit board characteristics

　　 1. The impedance control requirements are relatively strict, and the relative line width control is very strict, with a general tolerance of about 2%.

　　2. Due to the special plate material, the adhesion of PTH during copper sinking is not high. It is usually necessary to roughen the vias and the surface with the help of plasma processing equipment to increase the adhesion of PTH hole copper and solder mask ink.

　　3. Do not grind the board before doing solder mask, otherwise the adhesion will be poor, and only use micro-etching potion to roughen it.

　　4. Most of the plates are polytetrafluoroethylene materials, and there will be a lot of burrs when molding with ordinary milling cutters, and special milling cutters are required.

　　 5. High-frequency circuit boards are special circuit boards with higher electromagnetic frequencies. Generally speaking, high-frequency can be defined as frequencies above 1GHz.

　　 Its various physical properties, accuracy, and technical parameters require very high requirements, and are often used in automobile anti-collision systems, satellite systems, radio systems and other fields.