What Are The Advantages and Disadvantages of FR4 in PCB Material?
- By : Insulation Materials
What are the advantages and disadvantages of FR4 in PCB material?
FR-4 epoxy board is mainly made of glass fiber cloth bonded with epoxy resin, which is made by heating and pressurizing. It has stable electrical properties under high humidity and high mechanical properties at medium temperature. The existence of polar hydroxyl and ether bonds inherent in the epoxy resin molecular chain makes it highly adhesive to various substances. Epoxy resins have low shrinkage when cured, and the resulting internal stress is small, which also helps to improve adhesion strength. Heat resistance level F (155 degrees). It is suitable for high-insulation structural parts for machinery, electrical appliances and electronics, with high mechanical and dielectric properties, good heat resistance and moisture resistance. FR-4 epoxy board has high mechanical properties and dielectric properties, good heat resistance and moisture resistance, and has good machinability. It can be used as insulating structural parts in motors and electrical equipment, including various types of switches, electrical insulation, FPC reinforcement boards, carbon film printed circuit boards, computer drilling pads, mold fixtures, etc. (PCB test stand) and can be used in humid environment conditions and transformer oil, the application is extremely wide.
Characteristics of FR-4 epoxy board in PCB material FR-4 epoxy glass fiber cloth substrate is a type of substrate that uses epoxy resin as an adhesive and electronic grade glass fiber cloth as a reinforcing material. Its bonding sheet and inner core thin copper clad laminate are important substrates for making multilayer printed circuit boards. Performance The mechanical properties, dimensional stability, impact resistance, and moisture resistance of epoxy glass fiber cloth substrates are higher than those of paper substrates. It has excellent electrical performance, higher operating temperature, and its performance is less affected by the environment. In processing technology, it has great advantages over other resin glass fiber cloth substrates. This type of product is mainly used for double-sided PCB, a large amount.
Disadvantages of FR-4 epoxy board in PCB material: poor electrical performance, only suitable for low frequency field. It is not suitable for use at high frequency, and the loss and dielectric do not meet the requirements.