The proposed COM package, as shown in Fig. 2, has the dielectric layer of the COB package metal PCB removed to directly install the chip to the aluminum metal base surface. This is so the heat produced from the chip can be directly absorbed by the aluminum metal base. The package configuration is a low thermal resistance LED package structure with the simplest configuration of three thermal nodes. The test specimens used in this research were the COB and COM packages that were fabricated in the same conditions. The chips for the COB and COM packages were of InGaN/Sapphire type 1.1 mm×1.1 mm and 1 W and 16 chips were arranged in a multi array structure with 4 in parallel position and 4 in serial position. For the metal PCB, 2 types of COB PCB and COM PCB were fabricated as shown in Fig. 3. The chip was directly installed on the Cu layer for the COB and on the aluminum plate for the COM. The adhesive used between the PCB and the chip was Ag epoxy, which has a thermal conductivity of 20 W/mK. Table 1 organizes the properties of the material used in the manufacture of the LED. Fig. 4 shows the COM package assembly process.