The metal core PCB is composed of metal boards (such as aluminum, copper, iron, silicon steel), high thermal conductivity insulating dielectric layer and copper foil. The insulating layer is generally made of epoxy glass fiber cloth adhesive sheet with high heat conductivity or epoxy resin with high heat conductivity. The thickness of the insulating layer is 50um - 200um, and the thickness specification of the metal board is 0.5 mm, 1.0 mm, 1.5 mm, 2.0 mm, 3.0 mm. (Special thickness can be customized) Characteristics and application fields of various metal boards Copper based copper clad board has the basic performance of aluminum based copper clad plate, and its heat dissipation is better than that of aluminum based copper clad plate. This kind of base plate can carry large current and be used to manufacture PCB for high-power circuits such as power electronics and automotive electronics. However, the copper base plate has high density, high value and is easy to oxidize, which limits its application, and its amount is far lower than that of aluminum based copper clad plate. Iron core copper clad plate and silicon steel copper clad plate have excellent electrical performance, magnetic conductivity, withstand voltage and high strength. It is mainly used for brushless DC motor, tape recorder, spindle motor and intelligent driver for radio recorder. However, the magnetism of silicon steel CCL is better than that of iron core CCL. Copper cross-section !page-800-600 Unilateral copper core !page-454-340 Sandwich copper core
