| 摘要 |
PROBLEM TO BE SOLVED: To enable an LED lamp to be improved in brightness and uniformity by a method wherein fluorescent material is made to contain an element selected out of an element group composed of Ba, St, Mg, Ca, and Zn and/or Si component. SOLUTION: A fluorescent material is primarily formed of an yttrium.aluminum oxide fluorescent material 101 activated by cerium which is capable of emitting light when it is excited by light emitted from a semiconductor device 102 where a nitride compound layer is made to serve as a light emitting layer and contains one element selected out of Ba, St, Mg, Ca, and Zn and/or Si. It is preferable that a conductive wire 103 is high in ohmic properties to the electrode of a semiconductor device 102, mechanical connectivity, electrical conductivity, and thermal conductivity. A mount lead 105 where an LED chip is arranged is large enough in area to be mounted with a die bond equipment. A molded member 104 is provided to protect a coating part from the outside. |
