Patent ID: 9419187
Filing Date: 2016-08-16
CPC Classification: C09K,H01L

Claim Text:
1. A light emitting device comprising: a package having side walls which define a recess; a light emitting element arranged in the recess; and a sealing member which seals the light emitting element; wherein the sealing member comprises: wherein the fluorescent material particles include particles of a fluoride fluorescent material that is activated with tetravalent manganese ions and has a chemical composition represented by the following formula (I), wherein A is a cation which contains at least K wherein the particles of fluoride fluorescent material include a surface region and an inner region, both the surface region and the inner region comprising tetravalent manganese ions, and wherein a tetravalent manganese ion concentration of the surface region of the particles of fluoride fluorescent material is lower than a tetravalent manganese ion concentration of the inner region of the particles of fluoride fluorescent material.