A method is provided for manufacturing a LED package base including providing a metal core substrate having a top surface and a bottom surface and forming two first trenches in the metal core substrate. The first trenches extend from the top surface to the bottom surface. The method further includes at least partially filling in the first trenches with first dielectric material to form dielectric isolations. The dielectric isolations divide the metal core substrate into three metal core portions. Two of the metal core portions may be configured to serve as LED package electrodes. The method also includes applying a second dielectric material to cover at least a portion of the first dielectric material, and forming a conductive layer over the second dielectric material to form circuit contacts. The conductive layer includes a first conductive material.