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Metal Core PCBs

Technical information : Aluminium - the material used for Metal Core PCB - is very effective to achieve heat conduction from the PCB (so that for example heat sinks can be replaced). Further advantages of the metal core are : shielding effect from electro-magnetic fields (e.g. to reduce induction of HF fields to PCB circuit), and strong structural strength (to increase the mechanical stability for cases, when PCB is impacted to vibrations). Application as: PCBs for DC/DC Converter (picture 1), Power module, LEDs with extremely high current and high temperature operation (picture 2) etc.

A photo of a DC/DC converter

Pic. 1 DC/DC converter

A photo of a LED

Pic. 2 LED


1) Material and electrical functions

Al

Copper

Dielectric Layer

Break down Voltage

Thermal Conductivity

1.0-3.2mm

1.0-4.0 oz

75,80,120,150 mkm

6KV AC, 5KV AC

1.8, 2.0, 3.0, 4.0 w/mºk


2)Type

Al+EPOXY+CU

Epoxy Type, Low conductivity (0.6w/mºk)

Al+Insulation+CU

Insulation Type, High conductivity (3.0w/mºk)

Al+Insulation+CU+Insulation+CU

Epoxy Type, Low conductivity (0.6/mºk)


3)Fabrication

 a) Press Punching
 b) Routing
 c) V-cutting

Structure

Structure of a Metal Core PCB 

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