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Machine translation
1. (WO2005064666) HIGHLY EFFICIENT GALLIUM NITRIDE BASED LIGHT EMITTING DIODES VIA SURFACE ROUGHENING
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2005/064666    International Application No.:    PCT/US2003/039211
Publication Date: 14.07.2005 International Filing Date: 09.12.2003
Chapter 2 Demand Filed:    23.05.2005    
IPC:
H01L 21/465 (2006.01), H01L 29/06 (2006.01), H01L 29/20 (2006.01), H01L 33/22 (2010.01), H01L 33/32 (2010.01)
Applicants: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA [US/US]; 1111 Franklin Street, 12th Floor, Oakland, CA 94607 (US) (For All Designated States Except US).
FUJII, Tetsuo [JP/US]; (US) (For US Only).
GAO, Yan [CN/US]; (US) (For US Only).
HU, Evelyn, L. [US/US]; (US) (For US Only).
NAKAMURA, Shuji [JP/US]; (US) (For US Only)
Inventors: FUJII, Tetsuo; (US).
GAO, Yan; (US).
HU, Evelyn, L.; (US).
NAKAMURA, Shuji; (US)
Agent: GATES, George, H.; Gates & Cooper LLP, 6701 Center Drive West, Suite 1050, Los Angeles, CA 90045 (US)
Priority Data:
Title (EN) HIGHLY EFFICIENT GALLIUM NITRIDE BASED LIGHT EMITTING DIODES VIA SURFACE ROUGHENING
(FR) DIODES ELECTROLUMINESCENTES A BASE DE NITRURE DE GALLIUM TRES EFFICACES GRACE A UNE SURFACE RENDUE RUGUEUSE
Abstract: front page image
(EN)A gallium nitride (GaN) based light emitting diode (LED), wherein light is extracted through a nitrogen face (N-face) (42) of the LED and a surface of the N-face (42) is roughened into one or more hexagonal shaped cones. The roughened surface reduces light reflections occurring repeatedly inside the LED, and thus extracts more light out of the LED. The surface of the N-face (42) is roughened by an anisotropic etching, which may comprise a dry etching or a photo-enhanced chemical (PEC) etching.
(FR)L'invention concerne une diode électroluminescente (DEL) à base de nitrure de gallium (GaN), dans laquelle la lumière est extraite par une face azote (face N) (42) de la DEL ; et une surface de ladite face (42) est rendue rugueuse par la formation, sur celle-ci, d'un ou de plusieurs cônes de forme hexagonale. La surface rendue rugueuse réduit les réflexions lumineuses produites de façon répétée dans la DEL et permet ainsi d'extraire plus de lumière de celle-ci. La surface de la face N (42) est rendue rugueuse par la mise en oeuvre d'un procédé de gravure anisotrope, qui comprend une gravure à sec ou une gravure chimique photoassistée (PEC).
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IT, LU, MC, NL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)