# Is it possible to skip the dielectric layer and BT layer for SinkPAD PCB?

_Published: 2016-08-12_

The answer is no, BT layer (Like as the FR4) and dielectric layer are very important, it is impossible to skip both of them or one of them.

Because the copper can’t be combined with meatal core, if we remove them, then we can’t make the trace on the metal base.

The other reason is the dielectric layer is most important for heat dissipation, normally, dielectric layer the thicker the better.