Patent ID: 7825580
Filing Date: 2010-11-02
Classification: C01B,C01P,C04B,C09K,H01L,H05B

Abstract:
1. A phosphor comprising: α-type sialon crystal as a main component, wherein the α-type sialon crystal comprises: at least an A element, which is Eu; an M element, which is Ca; Si; Al; oxygen; and nitrogen, wherein the α-type sialon crystal is expressed by a general formula: wherein the α-type sialon crystal is expressed by a composition formula having parameters x, y, m, and n, which are in a range expressed by: wherein x is an amount of solid solution of M in a sialon unit cell, y is an amount of solid solution of A in the sialon unit cell, and n is a content amount of oxygen in the sialon unit cell; and wherein the phosphor emits fluorescence having a peak in a wavelength range from 560 nm to 575 nm upon irradiation of an excitation source.