China Flexible Printed Circuit Board

Definition and Features of Aluminum PCB

Printed Circuit Board is the full name of PCB. Generally, the PCB board is also can be called as high frequency board, circuit board, aluminum PCB, PCB, ultra-thin circuit board, thin circuit board, printed (copper engraving technology) board etc. The aluminum printed circuit board is a unique metal-based CCL, which has good thermal conductivity, electrical insulation properties and machining performance. In addition,aluminium pcb has many good features as follows: PCB uses of surface mount technology (SMT); have extremely effective treatment in the circuit design on the thermal diffusion; reduce the operating temperature, increase the power density and reliability, extend the product life; reduce the volume of the products so as to reduce the cost of hardware and assembly; replace the fragile ceramic substrates, to obtain better mechanical durability.

Structure of Printed Circuit Board Assembly
Printed circuit board is a metal circuit board material, it is composed by copper foil, thermal insulation layer and the metal substrate. And its structure is divided into three layers.
The circuit level : it is the equivalent of a common PCB, CCL, the line thickness of copper foil is from l oz to 10 oz. The insulating layer: the insulation layer is a layer of low thermal resistance, thermal insulation materials. Thickness: 0.003 "to 0.006" aluminum core of the CCL meter technique which has received UL certification. Base layer: it is a metal substrate, it is usually aluminum or can be selected copper. Copper clad aluminum and traditional epoxy glass cloth laminates, etc.

Circuit Layer of Flexible Circuit Boards
Circuit layer (copper foil) is usually formed after etching the printed circuit, component parts connected to each other, under normal circumstances, the circuit layer requires a large carrying capacity, which should use thick copper foil thickness of 35μm ~ 280μm; thermal insulation layer is the core technology of the aluminum PCB where the polymer composition, it is generally filled by special ceramic thermal resistance, excellent viscoelastic properties of thermal aging ability, able to withstand the mechanical and thermal stress . The company produces high-performance aluminum PCB thermal insulation layer just uses such technology, it has a very good thermal conductivity and high strength electrical insulation properties; metal grass-roots is the support component of the flexible circuit boards, it requires a high thermal conductivity, usually is aluminum, but it can also use copper (since copper can provide better thermal conductivity), and it is suitable for the drilling, punching and cutting of conventional machining.

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