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Metal core PCB, MCPCB is a general term of PCB which traces are made on top of one layer of metal plate for improved heat transferring and dissipating purposes. The most common metals for heat dissipation are aluminum and copper. Aluminum has good heat transfer and dissipation abilities, but yet relatively cheaper. On the other hand, copper has even better performance but relatively more expensive. Therefore, majority of MCPCB are made out of aluminum.

Applications of MCPCB can be categorized into two different types, the industrial and consumer product segments. MCPCB is not a new technique neither a new product. It has been on the market for decades. It was broadly used in high power & high voltage heavy electrical equipments, medical equipments, and military products, even in power supply, rectifier and transformer. It is a matured technology and product.

Recently, the continuing trend of electronic device miniaturization and introduction of high power LED, MCPCB, with better heat dissipating capability than traditional PCB, which makes it even more popular in consumer segments. These new applications are LED backlight, LED lighting and automotive. The key to success of these applications is determined by the selecting correct high thermal conductivity insulating layer, known as dielectric or PP.

The material used for MCPCB is called Insulated Metal Substrate, IMS. Its structure consist three different materials, on top is the copper foil; in the middle is the PP (or so called dielectric); at the bottom is the metal plate. The most common metal plate used is aluminum or copper.