EXHIBIT 1003
`
`U.S. Patent No. 5,998,925 to Shimizu et al.
`
`(“Shimizu”)
`
`

`
`United States Patent [19]
`Shimizu et al.
`
`US005998925A
`[11] Patent Number:
`[45] Date of Patent:
`
`5,998,925
`Dec. 7, 1999
`
`[54] LIGHT EMITTING DEVICE HAVING A
`NITRIDE COMPOUND SEMICONDUCTOR
`AND A PHOSPHOR CONTAINING A
`GARNET FLUORESCENT MATERIAL
`
`[75] Inventors: Yoshinori Shimizu, Naka-gun; Kensho
`Sakano, Anan; Yasunobu Noguchi,
`Naka-gun; Toshio Moriguchi, Anan, all
`of Japan
`
`[73] Assignee: Nichia Kagaku Kogyo Kabushiki
`Kaisha, Tokushima, Japan
`
`[21] Appl. No.: 08/902,725
`[22]
`Filed:
`Jul. 29, 1997
`[30]
`Foreign Application Priority Data
`
`Jul. 29, 1996
`Sep. 17, 1996
`Sep. 18, 1996
`Dec. 27, 1996
`Mar. 31, 1997
`
`[JP]
`[JP]
`[JP]
`[JP]
`[JP]
`
`Japan .................................. .. 8-198585
`Japan
`.. 8-244339
`Japan
`.. 8-245381
`Japan
`8-359004
`Japan ................................. ... 9-081010
`
`Int. Cl.6 .............................. .. H01J 1/62; H01J 63/04
`[51]
`[52] US. Cl. ........................ .. 313/503; 313/498; 313/501;
`313/502; 257/103
`[58] Field of Search ................................... .. 313/498, 503,
`313/501, 502; 257/103
`
`[56]
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`
`3,699,478 10/1972 Pinnow et al. ....................... .. 332/751
`4,298,820 11/1981 Bongers et al. .
`4,727,283
`2/1988 Van Kemenade et al. .
`5,798,537
`8/1998 Nitta ...................................... .. 257/103
`
`FOREIGN PATENT DOCUMENTS
`
`50-43913
`
`4/1975 Japan.
`
`55-4898
`62-20237
`1 —179471
`5 —15 2609
`7-099345
`7-176794
`8-007614
`9-027642
`
`1/1980
`1/1987
`7/1989
`6/1993
`4/1995
`7/1995
`1/1996
`1/1997
`
`Japan .
`Japan .
`Japan .
`Japan .
`Japan .
`Japan .
`Japan .
`Japan .
`
`OTHER PUBLICATIONS
`
`“A NeW Phosphor for Frying—Spot Cathode—Ray Tubes for
`Color Television: YelloW—Emitting Y3a15O12—Ce3+”, G.
`Glasse et al., Applied Physics Letters, vol. 11, No. 2, pp.
`53—54 (1967).
`“Improved color rendition in high pressure mercury vapor
`lamps”, Mary V. Hoffman, Journal of IES, pp. 89—91 (1977).
`S. Nakamura, SPIE, 3002:26—35 (1997).
`Primary Examiner—Vip Patel
`Assistant Examiner—Michael J. Smith
`Attorney, Agent, or Firm—Birch, SteWart, Kolasch & Birch,
`LLP
`
`[57]
`
`ABSTRACT
`
`The White light emitting diode comprising a light emitting
`component using a semiconductor as a light emitting layer
`and a phosphor Which absorbs a part of light emitted by the
`light emitting component and emits light of Wavelength
`different from that of the absorbed light, Wherein the light
`emitting layer of the light emitting component is a nitride
`compound semiconductor and the phosphor contains garnet
`?uorescent material activated With cerium Which contains at
`least one element selected from the group consisting of Y,
`Lu, Sc, La, Gd and Sm, and at least one element selected
`from the group consisting of Al, Ga and In and, and is
`subject to less deterioration of emission characteristic even
`When used With high luminance for a long period of time.
`
`23 Claims, 19 Drawing Sheets
`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 1
`
`

`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 2
`
`

`
`U.S. Patent
`
`Dec. 7,1999
`
`Sheet 2 0f 19
`
`5,998,925
`
`Fig. 3A
`
`100
`
`Relative 5O
`intensity
`(%)
`
`200
`
`400
`300
`Excitation spectrum
`
`500
`Wavelength ( A )
`
`Fig.3B
`
`100
`
`Relative
`intensity 50
`
`400
`
`600
`500
`Emission spectrum
`
`700
`Wavelength ( A )
`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 3
`
`

`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 4
`
`

`
`U.S. Patent
`
`Dec. 7,1999
`
`Sheet 4 0f 19
`
`5,998,925
`
`Fig. 5A
`
`100
`
`Relative 50
`intensity
`(%)
`
`200
`
`400
`300
`Excitation spectrum
`
`500
`Wavelength ( A )
`
`Fig. 5B
`
`100
`
`Relative
`intensity 5O
`
`400
`
`600
`500
`Emission spectrum
`
`700
`Wavelength ( A )
`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 5
`
`

`
`U.S. Patent
`
`Dec. 7,1999
`
`Sheet 5 0f 19
`
`5,998,925
`
`Fig. 6
`
`420
`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 6
`
`

`
`U.S. Patent
`
`Dec. 7,1999
`
`Sheet 6 0f 19
`
`5,998,925
`
`Fig. 7
`
`705
`
`704
`
`703
`
`705
`
`704
`
`703
`
`706
`
`707
`
`702
`
`705
`
`704
`
`703
`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 7
`
`

`
`U.S. Patent
`
`Dec. 7,1999
`
`Sheet 7 0f 19
`
`5,998,925
`
`Fig. 10
`
`601
`S
`
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`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 8
`
`

`
`U.S. Patent
`
`Dec. 7,1999
`
`Sheet 8 0f 19
`
`5,998,925
`
`505
`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 9
`
`

`
`U.S. Patent
`
`Dec. 7,1999
`
`Sheet 9 0f 19
`
`5,998,925
`
`1 3 A
`
`120 f
`
`Life test
`If=20mA Ta=25°C
`
`100 ""=~
`
`\
`
`Relative 80 _
`power
`60 _
`
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`
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`
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`1000
`
`Lighting time (H)
`
`F lg '
`
`120 t
`
`Life test
`lf=20mA Ta=60°C 90%RH
`
`100 \ Relative 80 H‘
`
`power
`(%)
`
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`40 ‘ \
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`
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`
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`
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`800
`
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`1000
`
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`I
`600
`400
`Lighting time (H)
`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 10
`
`

`
`U.S. Patent
`
`Dec. 7, 1999
`
`Sheet 10 0f 19
`
`5,998,925
`
`Fig. 14A
`
`100
`
`\\\
`80 -
`
`Brightness
`holding rate 60 '
`°/>
`(
`)
`
`40 —
`
`20 ~
`
`0
`
`Weathering test
`
`““~~\____\
`
`\
`
`I
`
`200
`
`I
`
`400
`
`l
`
`600
`
`Time (hr)
`
`Fig.14B
`
`Y
`
`0.38 -
`
`0.34 "
`
`0.30 —
`
`0.26 -
`
`0hr
`/ ll’
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`
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`
`0.22
`0.24
`
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`0.28
`
`'
`0.32
`
`A
`0.36
`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 11
`
`

`
`U.S. Patent
`
`Dec. 7, 1999
`
`Sheet 11 0f 19
`
`5,998,925
`
`Fig. 15A
`
`Reliability test
`
`120 -
`
`100
`
`80 -
`
`O
`Brightness
`holding rate 6 F
`We)
`
`40 _
`
`20“
`
`Fig. 158
`
`0.38 -
`
`500
`
`Time (hr)
`
`1000
`
`0.34 -
`
`/
`
`,I
`
`0.30 —
`
`1000hr
`
`0.26
`0.24
`
`'
`0.23
`
`0.32
`
`0.36
`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 12
`
`

`
`U.S. Patent
`
`Dec. 7, 1999
`
`Sheet 12 0f 19
`
`5,998,925
`
`2 at
`
`m6
`
`md
`
`10
`
`m6 1o No
`
`0.0
`0.0
`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 13
`
`

`
`U.S. Patent
`
`Dec. 7, 1999
`
`Sheet 13 0f 19
`
`5,998,925
`
`m6 v.0 Q0 Nd
`
`
`
`
`
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`E250 $585
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`
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`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 14
`
`

`
`U.S. Patent
`
`Dec. 7, 1999
`
`Sheet 14 0f 19
`
`5,998,925
`
`Fig. 18A
`
`100
`90
`8O
`7O
`6O
`5O
`4O
`3O
`2O
`10
`O
`380
`
`
`
`
`
`(0/0) Ausuew! eAnE‘letl
`
`F
`
`430
`
`580
`530
`480
`Wavelength (nm)
`
`630
`
`680
`
`730
`
`480
`530
`580
`Wavelength (nm)
`
`630
`
`680
`
`730
`
`580
`530
`480
`Wavelength (nm)
`
`630
`
`680
`
`730
`
`430
`
`1 O0
`90
`8O
`7O
`6O
`5O
`40
`3O
`20
`10
`0
`380
`430
`180
`100
`90
`80
`7O
`6O
`5O
`4O
`3O
`2O
`1O
`0
`380
`
`
`
`
`
`(%) ?llsuezul GAnmeH
`
`
`
`
`
`(0/0) ?lgsuelul enlle|ea
`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 15
`
`

`
`U.S. Patent
`
`Dec. 7, 1999
`
`Sheet 15 0f 19
`
`5,998,925
`
`Fig. 19A
`
`100
`90
`8O
`70
`6O
`5O
`40
`3O
`2O
`10
`O
`380
`
`
`
`
`
`(0/0) lttgsuelul eAHBIBH
`
`430
`
`580
`530
`480
`Wavelength (nm)
`
`630
`
`680
`
`730
`
`580
`530
`480
`Wavelength (nm)
`
`630
`
`680
`
`730
`
`
`
`
`
`(0/0) lltgsuelul 9Al112|6H
`
`1
`100
`90
`8O
`70
`60
`50
`40
`30
`20
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`0
`430
`380
`196
`100
`
`OJ-P-U'ICDNGJLD OOOOOOO 20
`
`_L 0000 oo o
`
`
`
`
`
`(0/0) ?lgsuetu! eAnBletl
`
`430
`
`580
`530
`480
`Wavelength (nm)
`
`630
`
`680
`
`730
`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 16
`
`

`
`U.S. Patent
`
`Dec. 7, 1999
`
`Sheet 16 0f 19
`
`5,998,925
`
`430
`
`530
`480
`580
`Wavelength (nm)
`
`630
`
`680
`
`730
`
`Fig.20C
`
`100
`
`0000000 9876543 Q
`
`
`
`“6615 56:2
`
`
`
`430
`
`530
`480
`580
`Wavelength (nm)
`
`630
`
`680
`
`730
`
`430
`
`530
`480
`580
`Wavelength (nm)
`
`630
`
`680
`
`730
`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 17
`
`

`
`U.S. Patent
`
`Dec. 7, 1999
`
`Sheet 17 0f 19
`
`5,998,925
`
`Fig.
`21A
`100
`
`
`
`
`
`0/) mgsuelug emmeg OJ #- 01 CD \I oo (0 O O O O C) O O
`
`430
`
`580
`530
`480
`Wavelength (nm)
`
`630
`
`680
`
`730
`
`60
`5O
`4O
`3O
`2O
`10
`O
`380
`430
`Fig
`.21C
`100
`
`480
`580
`530
`Waveiength (n m)
`
`630
`
`680
`
`730
`
`-r\aoaJ:-u1cn\looco Oooooooooo
`
`380
`
`430
`
`580
`530
`480
`Wavelength (nm)
`
`630
`
`680
`
`730
`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 18
`
`

`
`U.S. Patent
`
`Dec. 7, 1999
`
`Sheet 18 0f 19
`
`5,998,925
`
`Fig.22A
`
`8
`
`0 3
`
`0
`
`0 3
`
`0
`
`0
`
`0B C
`
`
`
`
`mm_m=<m5$:m=< A\ov 10987654321 .m987654 21
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`
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`
`6 0 0
`
`3 3 4 4
`
`8 8 4 4
`
`3 3
`
`8 8 6 6
`
`3 3 7 7
`
`Wavelength (nm)
`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 19
`
`

`
`U.S. Patent
`
`Dec. 7, 1999
`
`Sheet 19 0f 19
`
`5,998,925
`
`0mm
`
`com
`
`0mm
`
`00@
`
`0mm
`
`omw
`
`0mm
`
`3.9..‘
`
`Relative intensity (°/o)
`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 20
`
`

`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 21
`
`

`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 22
`
`

`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 23
`
`

`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 24
`
`

`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 25
`
`

`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 26
`
`

`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 27
`
`

`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 28
`
`

`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 29
`
`

`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 30
`
`

`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 31
`
`

`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 32
`
`

`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 33
`
`

`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 34
`
`

`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 35
`
`

`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 36
`
`

`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 37
`
`

`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 38
`
`

`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 39
`
`

`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 40
`
`

`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 41
`
`

`
`Kingbright Elec. Co. Ltd., Kingbright Corp., SunLED Corp.,
`Kingbright Co. LLC, SunLED Co. LLC and Sunscreen Co. Ltd.
`Exhibit - 1003 Page 42