US 7,597,823 B2
Nitride phosphor and production process thereof, and light emitting device
Hiroto Tamaki, Tokushima (Japan); Masatoshi Kameshima, Tokushima (Japan); Suguru Takashima, Tokushima (Japan); Motokazu Yamada, Anan (Japan); Takahiro Naitou, Anan (Japan); Kazuhiko Sakai, Anan (Japan); and Yoshinori Murazaki, Anan (Japan)
Assigned to Nichia Corporation, Anan-shi (Japan)
Filed on Oct. 03, 2007, as Appl. No. 11/905,720.
Application 11/905720 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 Mar. 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 2009/0072708 A1, Mar. 19, 2009
Int. Cl. C09K 11/59 (2006.01)
U.S. Cl. 252—301.4F  [252/301.6  F; 313/503; 257/98] 25 Claims
OG exemplary drawing
 
1. A nitride phosphor which is activated by at least one or more rare earth elements selected from a group consisting of Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Lu, and which comprises at least one or more of the Group II Elements selected from a group consisting of Be, Mg, Ca, Sr, Ba and Zn, at least one or more of the Group IV Elements selected from a group consisting of C, Si, Ge, Sn, Ti, Zr and Hf, and N, the nitride phosphor containing B in the range of 1 ppm to 10000 ppm.