Thermal Pads solder direct to the Aluminum or Copper substrate directly

LEDs Chip Thermal Pads solder direct to the Aluminum or Copper substrate directly, No dielectric between LEDs heat out pads and the Metal core. Means,thermal resistance is very small and thermal conductivity could be 235 W/m.k to 395 W/m.k. It is much better than regular MCPCB(1.0 w/m.k)