Patent ID: 8283681

Claim:
A lighting device comprising: a metal substrate comprising aluminum; a plurality of LED packages mounted on a top surface of the metal substrate, each package comprising a ceramic substrate, a LED chip mounted on a front surface of the ceramic substrate, an anode electrode, a cathode electrode and a heat release electrode, and the anode, cathode and heat release electrodes being disposed on a back surface of the ceramic substrate, a resin insulation film disposed on the top surface of the metal substrate so as to be between the LED packages and the top surface; and a first electrode, a second electrode and a third electrode which are disposed on the insulation film, wherein the first, second and third electrodes are bonded to the anode, cathode and heat release electrodes, respectively; wherein a shallow groove is formed in the first electrode or the second electrode; and wherein the shallow groove extends from the inside toward the outside of the first electrode, or from the inside toward the outside of the second electrode in a plane view.