Source: https://patents.google.com/patent/US9240529B2/en
Timestamp: 2018-09-19 23:18:59
Document Index: 562378490

Matched Legal Cases: ['§120', 'Application No. 14177879', 'application No. 07862038', 'Application No. 2009', 'Application No. 2014', 'Application No. 2009', 'Application No. 2009', 'application No. 2009', 'art 2']

US9240529B2 - Textured phosphor conversion layer light emitting diode - Google Patents
Textured phosphor conversion layer light emitting diode Download PDF
US9240529B2
US9240529B2 US14483501 US201414483501A US9240529B2 US 9240529 B2 US9240529 B2 US 9240529B2 US 14483501 US14483501 US 14483501 US 201414483501 A US201414483501 A US 201414483501A US 9240529 B2 US9240529 B2 US 9240529B2
US14483501
US20150014732A1 (en )
Natalie Fellows DeMille
This application is a continuation under 35 U.S.C. §120 of co-pending and commonly-assigned:
U.S. Utility patent application Ser. No. 11/940,885, filed on Nov. 15, 2007, by Natalie Fellows DeMille, Steven P. DenBaars, and Shuji Nakamura, entitled, “TEXTURED PHOSPHOR CONVERSION LAYER LIGHT EMITTING DIODE,” now U.S. Pat. No. 8,860,051, issued Oct. 14, 2014, which application claims the benefit under 35 U.S.C. Section 119(e) of co-pending and commonly-assigned:
U.S. Provisional Patent Application Ser. No. 60/866,024, filed on Nov. 15, 2006, by Natalie N. Fellows, Steven P. DenBaars and Shuji Nakamura, entitled “TEXTURED PHOSPHOR CONVERSION LAYER LIGHT EMITTING DIODE,” both of which applications are incorporated by reference herein.
U.S. Utility application Ser. No. 10/581,940, filed on Jun. 7, 2006, by Tetsuo Fujii, Yan Gao, Evelyn. L. Hu, and Shuji Nakamura, entitled “HIGHLY EFFICIENT GALLIUM NITRIDE BASED LIGHT EMITTING DIODES VIA SURFACE ROUGHENING,” now U.S. Pat. No. 7,704,763, issued Apr. 27, 2010, which application claims the benefit under 35 U.S.C Section 365(c) of PCT Application Serial No. US2003/03921, filed on Dec. 9, 2003, by Tetsuo Fujii, Yan Gao, Evelyn L. Hu, and Shuji Nakamura, entitled “HIGHLY EFFICIENT GALLIUM NITRIDE BASED LIGHT EMITTING DIODES VIA SURFACE ROUGHENING,”
U.S. Utility application Ser. No. 11/054,271, filed on Feb. 9, 2005, by Rajat Sharma, P. Morgan Pattison, John F. Kaeding, and Shuji Nakamura, entitled “SEMICONDUCTOR LIGHT EMITTING DEVICE,” now U.S. Pat. No. 8,227,820 issued Jul. 24, 2012;
U.S. Utility application Ser. No. 11/175,761, filed on Jul. 6, 2005, by Akihiko Murai, Lee McCarthy, Umesh K. Mishra and Steven P. DenBaars, entitled “METHOD FOR WAFER BONDING (Al, In, Ga)N and Zn(S, Se) FOR OPTOELECTRONICS APPLICATIONS,” now U.S. Pat. No. 7,344,958, issued Mar. 18, 2008, which application claims the benefit under 35 U.S.C Section 119(e) of U.S. Provisional Application Ser. No. 60/585,673, filed Jul. 6, 2004, by Akihiko Murai, Lee McCarthy, Umesh K. Mishra and Steven P. DenBaars, entitled “METHOD FOR WAFER BONDING (Al, In, Ga)N and Zn(S, Se) FOR OPTOELECTRONICS APPLICATIONS,”
U.S. Utility application Ser. No. 11/923,414, filed Oct. 24, 2007, by Claude C. A. Weisbuch, Aurelien J. F. David, James S. Speck and Steven P. DenBaars, entitled “SINGLE OR MULTI-COLOR HIGH EFFICIENCY LIGHT EMITTING DIODE (LED) BY GROWTH OVER A PATTERNED SUBSTRATE,” now U.S. Pat. No. 7,755,096, issued Jul. 13, 2010, which application is a continuation of U.S. Pat. No. 7,291,864, issued Nov. 6, 2007, to Claude C. A. Weisbuch, Aurelien J. F. David, James S. Speck and Steven P. DenBaars, entitled “SINGLE OR MULTI-COLOR HIGH EFFICIENCY LIGHT EMITTING DIODE (LED) BY GROWTH OVER A PATTERNED SUBSTRATE,”
U.S. Utility application Ser. No. 11/403,288, filed Apr. 13, 2006, by James S. Speck, Benjamin A. Haskell, P. Morgan Pattison and Troy J. Baker, entitled “ETCHING TECHNIQUE FOR THE FABRICATION OF THIN (AL, IN, GA)N LAYERS,” now U.S. Pat. No. 7,795,146, issued Sep. 14, 2010, which application claims the benefit under 35 U.S.C Section 119(e) of U.S. Provisional Application Ser. No. 60/670,790, filed Apr. 13, 2005, by James S. Speck, Benjamin A. Haskell, P. Morgan Pattison and Troy J. Baker, entitled “ETCHING TECHNIQUE FOR THE FABRICATION OF THIN (AL, IN, GA)N LAYERS,”
U.S. Utility application Ser. No. 11/454,691, filed on Jun. 16, 2006, by Akihiko Murai, Christina Ye Chen, Daniel B. Thompson, Lee S. McCarthy, Steven P. DenBaars, Shuji Nakamura, and Umesh K. Mishra, entitled “(Al, Ga, In)N AND ZnO DIRECT WAFER BONDING STRUCTURE FOR OPTOELECTRONIC APPLICATIONS AND ITS FABRICATION METHOD,” now U.S. Pat. No. 7,719,020, issued May 18, 2010, which application claims the benefit under 35 U.S.C Section 119(e) of U.S. Provisional Application Ser. No. 60/691,710, filed on Jun. 17, 2005, by Akihiko Murai, Christina Ye Chen, Lee S. McCarthy, Steven P. DenBaars, Shuji Nakamura, and Umesh K. Mishra, entitled “(Al, Ga, In)N AND ZnO DIRECT WAFER BONDING STRUCTURE FOR OPTOELECTRONIC APPLICATIONS, AND ITS FABRICATION METHOD,” U.S. Provisional Application Ser. No. 60/732,319, filed on Nov. 1, 2005, by Akihiko Murai, Christina Ye Chen, Daniel B. Thompson, Lee S. McCarthy, Steven P. DenBaars, Shuji Nakamura, and Umesh K. Mishra, entitled “(Al, Ga, In)N AND ZnO DIRECT WAFER BONDED STRUCTURE FOR OPTOELECTRONIC APPLICATIONS, AND ITS FABRICATION METHOD,” and U.S. Provisional Application Ser. No. 60/764,881, filed on Feb. 3, 2006, by Akihiko Murai, Christina Ye Chen, Daniel B. Thompson, Lee S. McCarthy, Steven P. DenBaars, Shuji Nakamura, and Umesh K. Mishra, entitled “(Al, Ga, In)N AND ZnO DIRECT WAFER BONDED STRUCTURE FOR OPTOELECTRONIC APPLICATIONS AND ITS FABRICATION METHOD,”
U.S. Utility application Ser. No. 11/633,148, filed Dec. 4, 2006, Claude C. A. Weisbuch and Shuji Nakamura, entitled “IMPROVED HORIZONTAL EMITTING, VERTICAL EMITTING, BEAM SHAPED, DISTRIBUTED FEEDBACK (DFB) LASERS FABRICATED BY GROWTH OVER A PATTERNED SUBSTRATE WITH MULTIPLE OVERGROWTH,” now U.S. Pat. No. 7,768,024, issued Aug. 3, 2010, which application claims the benefit under 35 U.S.C Section 119(e) of U.S. Provisional Application Ser. No. 60/741,935, filed Dec. 2, 2005, Claude C. A. Weisbuch and Shuji Nakamura, entitled “IMPROVED HORIZONTAL EMITTING, VERTICAL EMITTING, BEAM SHAPED, DFB LASERS FABRICATED BY GROWTH OVER PATTERNED SUBSTRATE WITH MULTIPLE OVERGROWTH,”
U.S. Utility application Ser. No. 11/593,268, filed on Nov. 6, 2006, by Steven P. DenBaars, Shuji Nakamura, Hisashi Masui, Natalie N. Fellows, and Akihiko Murai, entitled “HIGH LIGHT EXTRACTION EFFICIENCY LIGHT EMITTING DIODE (LED),” now U.S. Pat. No. 7,994,527, issued Aug. 9, 2011, which application claims the benefit under 35 U.S.C Section 119(e) of U.S. Provisional Application Ser. No. 60/734,040, filed on Nov. 4, 2005, by Steven P. DenBaars, Shuji Nakamura, Hisashi Masui, Natalie N. Fellows, and Akihiko Murai, entitled “HIGH LIGHT EXTRACTION EFFICIENCY LIGHT EMITTING DIODE (LED),”
U.S. Utility application Ser. No. 11/608,439, filed on Dec. 8, 2006, by Steven P. DenBaars, Shuji Nakamura and James S. Speck, entitled “HIGH EFFICIENCY LIGHT EMITTING DIODE (LED),” now U.S. Pat. No. 7,956,371, issued Jun. 7, 2011, which application claims the benefit under 35 U.S.C Section 119(e) of U.S. Provisional Application Ser. No. 60/748,480, filed on Dec. 8, 2005, by Steven P. DenBaars, Shuji Nakamura and James S. Speck, entitled “HIGH EFFICIENCY LIGHT EMITTING DIODE (LED),” and U.S. Provisional Application Ser. No. 60/764,975, filed on Feb. 3, 2006, by Steven P. DenBaars, Shuji Nakamura and James S. Speck, entitled “HIGH EFFICIENCY LIGHT EMITTING DIODE (LED),”
U.S. Utility application Ser. No. 11/676,999, filed on Feb. 20, 2007, by Hong Zhong, John F. Kaeding, Rajat Sharma, James S. Speck, Steven P. DenBaars and Shuji Nakamura, entitled “METHOD FOR GROWTH OF SEMIPOLAR (Al, In, Ga, B)N OPTOELECTRONIC DEVICES,” now U.S. Pat. No. 7,858,996, issued Dec. 28, 2010, which application claims the benefit under 35 U.S.C Section 119(e) of U.S. Provisional Application Ser. No. 60/774,467, filed on Feb. 17, 2006, by Hong Zhong, John F. Kaeding, Rajat Sharma, James S. Speck, Steven P. DenBaars and Shuji Nakamura, entitled “METHOD FOR GROWTH OF SEMIPOLAR (Al, In, Ga, B)N OPTOELECTRONIC DEVICES,”
U.S. Utility patent application Ser. No. 11/940,848, filed on Nov. 15, 2007, by Aurelien J. F. David, Claude C. A. Weisbuch and Steven P. DenBaars entitled “HIGH LIGHT EXTRACTION EFFICIENCY LIGHT EMITTING DIODE (LED) THROUGH MULTIPLE EXTRACTORS,” which application claims the benefit under 35 U.S.C Section 119(e) of U.S. Provisional Patent Application Ser. No. 60/866,014, filed on Nov. 15, 2006, by Aurelien J. F. David, Claude C. A. Weisbuch and Steven P. DenBaars entitled “HIGH LIGHT EXTRACTION EFFICIENCY LIGHT EMITTING DIODE (LED) THROUGH MULTIPLE EXTRACTORS,” and U.S. Provisional Patent Application Ser. No. 60/883,977, filed on Jan. 8, 2007, by Aurelien J. F. David, Claude C. A. Weisbuch and Steven P. DenBaars entitled “HIGH LIGHT EXTRACTION EFFICIENCY LIGHT EMITTING DIODE (LED) THROUGH MULTIPLE EXTRACTORS,”
U.S. Utility patent application Ser. No. 11/940,853, filed on Nov. 15, 2007, by Claude C. A. Weisbuch, James S. Speck and Steven P. DenBaars entitled “HIGH EFFICIENCY WHITE, SINGLE OR MULTI-COLOUR LED BY INDEX MATCHING STRUCTURES,” which application claims the benefit under 35 U.S.C Section 119(e) of U.S. Provisional Patent Application Ser. No. 60/866,026, filed on Nov. 15, 2006, by Claude C. A. Weisbuch, James S. Speck and Steven P. DenBaars entitled “HIGH EFFICIENCY WHITE, SINGLE OR MULTI-COLOUR LED BY INDEX MATCHING STRUCTURES,”
U.S. Utility patent application Ser. No. 11/940,866, filed on same date herewith, by Aurelien J. F. David, Claude C. A. Weisbuch, Steven P. DenBaars and Stacia Keller, entitled “HIGH LIGHT EXTRACTION EFFICIENCY LIGHT EMITTING DIODE (LED) WITH EMITTERS WITHIN STRUCTURED MATERIALS,” now U.S. Pat. No. 7,977,694, issued Jul. 12, 2011, which application claims the benefit under 35 U.S.C Section 119(e) of U.S. Provisional Patent Application Ser. No. 60/866,015, filed on same date herewith, by Aurelien J. F. David, Claude C. A. Weisbuch, Steven P. DenBaars and Stacia Keller, entitled “HIGH LIGHT EXTRACTION EFFICIENCY LED WITH EMITTERS WITHIN STRUCTURED MATERIALS,”
U.S. Utility patent application Ser. No. 11/940,876, filed on Nov. 15, 2007, by Evelyn L. Hu, Shuji Nakamura, Yong Seok Choi, Rajat Sharma and Chiou-Fu Wang, entitled “ION BEAM TREATMENT FOR THE STRUCTURAL INTEGRITY OF AIR-GAP III-NITRIDE DEVICES PRODUCED BY PHOTOELECTROCHEMICAL (PEC) ETCHING,” which application claims the benefit under 35 U.S.C Section 119(e) of U.S. Provisional Patent Application Ser. No. 60/866,027, filed on Nov. 15, 2006, by Evelyn L. Hu, Shuji Nakamura, Yong Seok Choi, Rajat Sharma and Chiou-Fu Wang, entitled “ION BEAM TREATMENT FOR THE STRUCTURAL INTEGRITY OF AIR-GAP III-NITRIDE DEVICES PRODUCED BY PHOTOELECTROCHEMICAL (PEC) ETCHING,”
U.S. Utility patent application Ser. No. 11/940,872, filed on Nov. 15, 2007, by Steven P. DenBaars, Shuji Nakamura and Hisashi Masui, entitled “HIGH LIGHT EXTRACTION EFFICIENCY SPHERE LED,” which application claims the benefit under 35 U.S.C Section 119(e) of U.S. Provisional Patent Application Ser. No. 60/866,025, filed on Nov. 15, 2006, by Steven P. DenBaars, Shuji Nakamura and Hisashi Masui, entitled “HIGH LIGHT EXTRACTION EFFICIENCY SPHERE LED,”
U.S. Utility patent application Ser. No. 11/940,883, filed on Nov. 15, 2007, by Shuji Nakamura and Steven P. DenBaars, entitled “STANDING TRANSPARENT MIRROR-LESS (STML) LIGHT EMITTING DIODE,” now U.S. Pat. No. 7,687,813, issued Mar. 30, 2010, which application claims the benefit under 35 U.S.C Section 119(e) of U.S. Provisional Patent Application Ser. No. 60/866,017, filed on Nov. 15, 2006, by Shuji Nakamura and Steven P. DenBaars, entitled “STANDING TRANSPARENT MIRROR-LESS (STML) LIGHT EMITTING DIODE,” and
U.S. Utility patent application Ser. No. 11/940,898, filed on Nov. 15, 2007, by Steven P. DenBaars, Shuji Nakamura and James S. Speck, entitled “TRANSPARENT MIRROR-LESS (TML) LIGHT EMITTING DIODE,” now U.S. Pat. No. 7,781,789, issued Aug. 24, 2010, which application claims the benefit under 35 U.S.C Section 119(e) of U.S. Provisional Patent Application Ser. No. 60/866,023, filed on Nov. 15, 2006, by Steven P. DenBaars, Shuji Nakamura and James S. Speck, entitled “TRANSPARENT MIRROR-LESS (TML) LIGHT EMITTING DIODE,”
an LED chip emitting light at a first wavelength, wherein the emitted light is extracted from both front and back sides of the LED chip;
a lead frame to which the LED chip is attached, wherein the LED chip resides on or above a transparent plate in the lead frame that allows the emitted light to be extracted out of the LED chip through the transparent plate in the lead frame; and
2. The device of claim 1, wherein at least a portion of the phosphor is roughened, textured, or patterned, so that the portion of the phosphor is not normal to the light emitted from the LED chip, to minimize internal reflection of the light within the phosphor.
3. The device of claim 1, further comprising a molding or shaped optical element, which acts as a lens, formed on or around the LED chip, wherein the molding or shaped optical element is transparent at the first wavelength.
4. The device of claim 3, wherein the phosphor is located on top of the molding or shaped optical element, within the molding or shaped optical element, or near a surface of the molding or shaped optical element.
5. The device of claim 3, further comprising a mirror placed outside of the molding or shaped optical element, in order to obtain more of the light emitted from at least one side of the LED chip, wherein the mirror's shape prevents reflected light from reaching the LED chip, in order to reduce re-absorption of the light by the LED chip.
6. The device of claim 1, wherein the transparent plate is roughened, textured or patterned to increase light extraction from the LED chip through the transparent plate in the lead frame.
7. The device of claim 1, wherein a side of the LED chip adjacent the transparent plate is roughened, textured or patterned, to increase extraction of the light emitted from the LED chip through the transparent plate in the lead frame.
8. The device of claim 1, wherein the LED chip includes a transparent substrate and the transparent substrate is adjacent the transparent plate.
9. The device of claim 8, wherein the transparent substrate is roughened, textured, or patterned, to increase the light extraction from the LED chip through the transparent plate in the lead frame.
10. The device of claim 8, wherein the transparent substrate is a patterned sapphire substrate (PSS) that increases the light extraction through an interface between the LED chip and patterned sapphire substrate.
11. The device of claim 1, further comprising at least one transparent contact layer deposited on a surface of the LED chip that is shaped, patterned, textured or roughened to increase extraction of the light emitted from the LED chip.
12. The device of claim 1, wherein the LED chip is made from a material selected from the group comprising a (Al, Ga, In)N material system, a (Al, Ga, In)As material system, a (Al, Ga, In)P material system, a (Al, Ga, In) AsPNSb material system, a ZnGeN2 material system, and a ZnSnGeN2 material system.
providing an LED chip emitting light at a first wavelength, wherein the emitted light is extracted from both front and back sides of the LED chip;
attaching the LED chip to a lead frame, wherein the LED chip resides on or above a transparent plate in the lead frame that allows the emitted light to be extracted out of the LED chip through the transparent plate in the lead frame; and
providing a phosphor for converting the light emitted by the LED chip at the first wavelength to a second wavelength.
14. The method of claim 13, wherein at least a portion of the phosphor is roughened, textured, or patterned, so that the portion of the phosphor is not normal to the light emitted from the LED chip, to minimize internal reflection of the light within the phosphor.
15. The method of claim 13, further comprising forming a molding or shaped optical element, which acts as a lens, on or around the LED chip, wherein the molding or shaped optical element is transparent at the first wavelength.
16. The method of claim 15, wherein the phosphor is located on top of the molding or shaped optical element, within the molding or shaped optical element, or near a surface of the molding or shaped optical element.
17. The method of claim 15, further comprising placing a mirror outside of the molding or shaped optical element, in order to obtain more of the light emitted from at least one side of the LED chip, wherein the mirror's shape prevents reflected light from reaching the LED chip, in order to reduce re-absorption of the light by the LED chip.
18. The method of claim 13, wherein the transparent plate is roughened, textured or patterned to increase light extraction from the LED chip through the transparent plate in the lead frame.
19. The method of claim 13, wherein a side of the LED chip adjacent the transparent plate is roughened, textured or patterned, to increase extraction of the light emitted from the LED chip through the transparent plate in the lead frame.
20. The method of claim 13, wherein the LED chip includes a transparent substrate and the transparent substrate is adjacent the transparent plate.
21. The method of claim 20, wherein the transparent substrate is roughened, textured, or patterned, to increase the light extraction from the LED chip through the transparent plate in the lead frame.
22. The method of claim 20, wherein the transparent substrate is a patterned sapphire substrate (PSS) that increases the light extraction through an interface between the LED chip and patterned sapphire substrate.
23. The method of claim 13, further comprising depositing at least one transparent contact layer on a surface of the LED chip that is shaped, patterned, textured or roughened to increase extraction of the light emitted from the LED chip.
24. The method of claim 13, wherein the LED chip is made from a material selected from the group comprising a (Al, Ga, In)N material system, a (Al, Ga, In)As material system, a (Al, Ga, In)P material system, a (Al, Ga, In) AsPNSb material system, a ZnGeN2 material system, and a ZnSnGeN2 material system.
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