MANUFACTURING METHOD OF LIGHT-EMITTING DEVICE

PROBLEM TO BE SOLVED: To provide a manufacturing method of a light-emitting device capable of suppressing chromaticity deviation by suppressing reduction of light emission output even at high temperature and high humidity, using a first phosphor containing thiogallate phosphor particles having improved moisture resistance and resistance to hydrogen fluoride, and a second phosphor of fluoride phosphor.SOLUTION: A manufacturing method of a light-emitting device includes a step of obtaining a first phosphor emitting fluorescent light in a range from green to yellow green, by forming a film containing aluminum oxide on the particles composed of a thiogallate phosphor by a CVD method, and a step of obtaining a light-emitting device by using a light source emitting light having an emission peak wavelength in a range of 420-480 nm, the first phosphor, and a second phosphor, i.e., a fluoride phosphor obtained by activating manganese emitting fluorescent light in a range from yellow red to red.SELECTED DRAWING: None 【課題】耐湿性及び耐フッ化水素性を改善したチオガレート蛍光体粒子を含む第一蛍光体と、フッ化物蛍光体である第二蛍光体とを用いて、高温高湿下においても発光出力の低下を抑制し、色度ずれを抑制し得る発光装置の製造方法を提供する。【解決手段】チオガレート蛍光体からなる粒子にＣＶＤ法により酸化アルミニウムを含む膜を形成して、緑色から黄緑色の範囲の蛍光を発する第一蛍光体を得る工程と、４２０〜４８０ｎｍの範囲に発光ピーク波長を有する光を発する光源と、前記第一蛍光体と、黄赤色から赤色の範囲の蛍光を発するマンガンが賦活されたフッ化物蛍光体である第二蛍光体とを用いて発光装置を得る工程とを含む、発光装置の製造方法である。【選択図】なし