Why MCPCB?

Metal core PCB (MCPCB) is more expensive than FR4 PCB,but why we have to choose MCPCB?Somebody call Metal core pcb (MCPCB) as LED PCB,it looks right,because we always assembly LED by MCPCB if which are High power LED in order to use the thermal properties of Metal core PCB (MCPCB).Metal core PCB use metal (aluminum,copper ) as base Material so that there is good thermal properties,but FR4 is not metal so it is not very good for thermal.

What is dielectric layer in metal core PCB (MCPCB)

Metal core is enough to heat transfer?No,not enough.You have to know there is insulated conductor between copper layers and Metal core,we call it dielectric layer,but how it work for heat dissipation?

Dielectric layer is the most important part of MCPCB, it is isolation and it helps to conduct the heat. Thermal conductivity can be 1-3W/m.K. For example, a single layer metal core PCB stack up, base is metal core, top is the copper, dielectric layer is in the middle. MCPCB is used instead of traditional FR4 or CEM3 PCB because of the ability to efficiently dissipate heat away from the components. This is achieved by using a Thermally Conductive dielectric Layer.

If you would like to know more,pls click to the dielectric layer in metal core PCB (MCPCB) for your information.