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Metal Core Printed Circuit Board

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General Information About Metal Core PCB

As Metal Core PCB means the base material for PCB is metal, not normal FR4/CEM1-3, etc, and currently the most common metal used are Aluminum, Copper alloy. Aluminum has good heat transer and dissipation ablility, but yet relatively cheaper. On the other hand, copper has even better performance but relatively more expensive. Thereforce, majority of MCPCB are made of aluminum. In our company, if not special request, or notes, the metal core refer will be aluminum.

MCPCBs are used instead of traditional FR4 or CEM3 PCBs because of the ability to efficiently dissipate heat away from the components. This is achieved by using a Thermally Conductive Dielectric Layer.

The main difference between a FR4 board and MCPCB is the thermally conductive dielectric material in the MCPCB. This acts as a thermal bridge between the IC components and metal backing plate. Heat is conducted from the package through the metal core to an additional heat sink. On the FR4 board the heat remains stagnant if not transferred by a topical heatsink. According to Avago’s white paper (AV01-0615EN.pdf) a MCPCB with a 1W LED remained near an ambient of 25C, while the same 1W LED on a FR4 board reached 12C over ambient.

Advantage of MCPCB

1.heat dissipation

Some LEDs dissipate between 2-5W of heat and failures occur when the heat from a LED is not properly removed; a LED’s light output is reduced as well as degradation when the heat remains stagnant in the LED package. The purpose of a MCPCB is to efficiently remove the heat from all topical IC’s (not just LEDs). The aluminum base and thermally conductive dielectric layer act as bridges between the IC’s and heat sink. One single heat sink is mounted directly to the aluminum base eliminating the need for multiple heat sinks on top of the surface mounted components.

2. thermal expansion

Thermal expansion and contraction is the common nature of the substance, different CTE is different in thermal expansion. As its own characterics, aluminum and copper have unique advance than normal FR4, thermal conductivity can be 0.8~3.0 W/c.K.

3. dimensional stability

It is clear that the size of the metal-based printed circuit board more stable than insulating materials. The size change of 2.5 ~ 3.0% when Aluminum PCB and aluminum sandwich panels was heated from 30 ℃ to 140 ~ 150 ℃.

Application of MCPCB

LED lights

High-current LED, Spotlight, high-current PCB

Industrial power equipment

High-power transistors, transistor arrays, push-pull or totem pole output circuit (to tem pole), solid-state relay, pulse motor driver, the engine Computing amplifiers (Operational amplifier for serro-motor), pole-changing device (Inverter)

Cars

firing implement, power regulator, exchange converters, power controllers, variable optical system

Power

voltage regulator series, switching regulator, DC-DC converters

Audio

input - output amplifier, balanced amplifier, pre-shield amplifier, audio amplifier, power amplifier

OA

Printer driver, large electronic display substrate, thermal print head

Audio

input - output amplifier, balanced amplifier, pre-shield amplifier, audio amplifier, power amplifier
Others Semiconductor thermal insulation board, IC arrays, resistor arrays, Ics carrier chip, heat sink, solar cell substrates, semiconductor refrigeration device

Sorting of Metal Core PCBs

According to different location of metal core and trace layers of PCB, right now, we divide into five basic types:

Please contact us today for more information about Metal Core PCB.

 

 
 
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