PRINTED CIRCUIT BOARD FOR CHIP ON BOARD TYPE LIGHT EMITTING DIODE MODULE

摘要

PURPOSE: A PCB for a COB type LED module using high reflective aluminum which is insulated and coated with heat radiation as a base plate is provided to improve the efficiency of light from an LED chip over 10% by forming a plurality of high reflective layers on the surface of an anodized aluminum plate to be overlapped. CONSTITUTION: An LED chip (11) is attached to a base plate (12). The base plate is composed of an anodized aluminum plate (20). An insulation layer (30) is formed on the upper side of the anodized aluminum plate. A heat radiation layer (40) is formed on the lower side of the anodized aluminum plate. A high reflective layer (50) includes a first reflective layer (52) composed of a titanium oxide thin film and a second reflective layer (54) coated with aluminum or silver.