US 7,556,744 B2
	Nitride phosphor and production process thereof, and light emitting device
Hiroto Tamaki, Tokushima (Japan); Masatoshi Kameshima, Tokushima (Japan); and Suguru Takashima, Tokushima (Japan)
Assigned to Nichia Corporation, Anan-shi (Japan)
Filed on Oct. 03, 2007, as Appl. No. 11/905,725.
Application 11/905725 is a division of application No. 11/252111, filed on Oct. 18, 2005, granted, now 7,297,293.
Application 11/252111 is a division of application No. 10/478598, granted, now 7,258,816, previously published as PCT/JP03/03418, filed on May 20, 2003.
Claims priority of application No. 2002-080879 (JP), filed on Mar. 22, 2002; application No. 2002-126566 (JP), filed on Apr. 26, 2002; application No. 2002-148555 (JP), filed on May 23, 2002; application No. 2002-167166 (JP), filed on Jun. 07, 2002; application No. 2002-187647 (JP), filed on Jun. 27, 2002; application No. 2002-226855 (JP), filed on Aug. 05, 2002; application No. 2002-348386 (JP), filed on Nov. 29, 2002; application No. 2002-348387 (JP), filed on Nov. 29, 2002; and application No. 2002-351634 (JP), filed on Dec. 03, 2002.
Prior Publication US 2008/0089825 A1, Apr. 17, 2008
Int. Cl. C09K 11/66 (2006.01); C09K 11/59 (2006.01)

U.S. Cl. 252—301.4F  [252/301.6  F; 257/98; 313/503]

40 Claims

1. A nitride phosphor which absorbs at least a portion of light having the first luminescence spectrum and emits light having the second luminescence spectrum which is different from said first luminescence spectrum, the nitride phosphor being an L2Si5N8: Eu, WR-base phosphor or an LSi7N10: Eu, WR-base phosphor (wherein L is at least one or more elements selected from the Group II Elements consisting of Be, Mg, Ca, Sr, Ba and Zn, N is nitrogen, Eu is europium, WR is a rare earth element other than Eu).