Patent ID: 6254740
Filing Date: 2001-07-03
Classification: C09K,H05B

Abstract:
A method for producing an electroluminescent device, which comprises depositing via sputtering a CaGa.sub.2 S.sub.4 :Ce layer, which functions as a luminescent layer of the electroluminescent device, from a sintered target made of CaGa.sub.2 S.sub.4 doped with Ce,wherein the sintered target has an X-ray diffraction spectrum with a ratio of an X-ray diffraction peak intensity for a (200) reflection of CaS to an X-ray diffraction peak intensity for a (400) reflection of CaGa.sub.2 S.sub.4 that is 0.5 or less, wherein the luminescent layer has an X-ray diffraction spectrum thereof with a ratio of an X-ray diffraction peak intensity for a (200) reflection of CaS to an X-ray diffraction peak intensity for a (400) reflection of CaGa.sub.2 S.sub.4 that is 0.1 or less, and wherein the luminescent layer has a y value on CIE chromaticity coordinates of 0.18 or less.