Patent ID: 9647181
Date: 2017-05-09
CPC Classifications: C09K,H01L,H05B

Claim:
1. A lighting device comprising: a ceramic substrate; a light emitting chip mounted on said ceramic substrate, for generating a primary light having a peak wavelength of 430 to 490 nm, said light emitting chip having a bottom surface facing said ceramic substrate and an upper surface; a pair of wires for electrically connecting said light emitting chip to a power supply, each of the wires having an end contacting with the upper surface of said light emitting chip; and a phosphor layer comprising: a first layer including a first phosphor composed of cerium, aluminum, lutetium and oxygen, for converting a portion of the primary light to a light having a first peak wavelength of 510 to 550 nm, and a second layer including a second phosphor composed of europium, silicon, aluminum and nitrogen, for converting a portion of the primary light to a light having a second peak wavelength longer than the first peak wavelength.