PCB Plate In the field of electronic engineering, the importance of PCB (Printed Circuit Board) is self-evident. As the foundation of electronic equipment, the quality, performance and reliability of PCB directly affect the operation of the entire equipment. As the core component of PCB, the selection of PCB board type has a crucial impact on the performance and reliability of PCB.
This article will introduce several common PCB board types and their characteristics in detail to help readers better understand and choose the right PCB board for themselves.
FR-4 sheet is one of the most widely used PCB sheets at present, with excellent insulation properties, mechanical strength, and heat resistance. FR-4 sheet is composed of fiberglass cloth and epoxy resin, which is pressed at high temperatures. Due to its good comprehensive performance and relatively low cost, FR-4 sheet is widely used in various electronic devices.
CEM-1 sheet is a composite material made of alternating paper and fiberglass cloth and filled with epoxy resin. Compared to FR-4 sheets, CEM-1 sheets cost less, but their mechanical strength and heat resistance are slightly inferior to FR-4. CEM-1 sheet is suitable for some electronic products that do not require high performance but need to reduce costs.
Metal substrate is a kind of PCB board with special heat dissipation performance, which is mainly made of metal (such as aluminum, copper, etc.) as the base material, and the surface is covered with an insulating layer and copper foil. The metal substrate has good heat dissipation performance and mechanical strength, and is suitable for high-power, high-density electronic devices, such as LED lighting, power modules, etc.
A high-frequency board is a type of PCB board specially used for high-frequency circuit design, with excellent dielectric properties and low loss characteristics. High-frequency plates are mainly made of high-performance materials such as polytetrafluoroethylene (PTFE), which are suitable for microwave communications, radar, satellite communications and other fields.
Flexible sheet is a flexible and flexible PCB sheet, mainly made of flexible materials such as polyimide (PI). Flexible sheet has the characteristics of light weight, thin thickness, and can be bent and folded, which is suitable for electronic devices that need to be bent or folded, such as wearable devices, mobile phone folding screens, etc.
Ceramic substrate is a PCB with high thermal stability, high insulation, and excellent mechanical properties. Ceramic substrates are mainly made of ceramic materials such as alumina and aluminum nitride, which are suitable for electronic equipment in harsh environments such as high temperature, high pressure and high frequency, such as aerospace, military equipment and other fields.
Composite substrate is a type of PCB board that combines different materials and has the advantages of multiple materials. For example, FR-4 and metal substrates can be combined to form composite substrates with heat dissipation propertiesIt is also possible to combine flexible and rigid materials to form a composite substrate with a rigid and flexible bond. Composite substrates can be customized according to actual needs to meet the special needs of different electronic devices.
When choosing a PCB board, you need to consider the working environment, performance requirements, cost budget and other factors of the electronic equipment. Different types of PCB boards have different characteristics and scope of application, and choosing the right PCB board is of great significance to improve the performance and reliability of electronic devices.