METHOD OF MANUFACTURING LIGHT-EMITTING DEVICE

To provide a method of manufacturing a light-emitting device capable of suppressing a decrease in light emission output even under high temperature and high humidity and suppressing chromaticity shift using a first phosphor containing thiogallate phosphor particles having improved moisture resistance and hydrogen fluoride resistance and a second phosphor, which is a fluoride phosphor.SOLUTION: The method of manufacturing a light-emitting device includes: a step of forming a film containing aluminum oxide on particles of thiogallate phosphor by a CVD method to obtain a first phosphor 41 for emitting fluorescence in a range from green to yellow-green; and a step of obtaining a light-emitting device 100 using a light source 10 for emitting light having an emission peak wavelength in a range of 420 to 480 nm, the first phosphor, and a second phosphor 42 which is a fluoride phosphor activated with manganese which emits fluorescence in a range from yellow red to red.SELECTED DRAWING: Figure 1 【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４１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１０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４２とを用いて発光装置１００を得る工程とを含む、発光装置の製造方法である。【選択図】図１