EP 1075710 A2 20010214 - LIGHT EMITTING SEMICONDUCTOR DEVICE
Title (en)
LIGHT EMITTING SEMICONDUCTOR DEVICE
Title (de)
LICHTEMISSIONS-HALBLEITEREINRICHTUNG
Title (fr)
DISPOSITIF SEMI-CONDUCTEUR A EMISSION DE LUMIERE
Publication
Application
Priority
- DE 9901164 W 19990416
- DE 19819543 A 19980430
Abstract (en)
[origin: DE19819543A1] The invention relates to a bicolour light emitting semiconductor device with both a first surface-emitting light emitting diode (10) consisting of a first active area (11) and emitting a first wavelength radiance, and a second surface-emitting light emitting diode (20) with a second active area (21) emitting a second wavelength radiance, whereby a first reflecting layer (12) is arranged between both active areas (11,21). Said reflecting layer reflects the first wavelength and transmits the second wavelength. A second reflecting layer (22) is arranged between the second active area (21) and the rear side, whereby said reflecting layer reflects the second wavelength. The reflecting layers result in better utilization of the light from both diodes radiated in the direction of the rear side. Preferably, the reflecting layers are made of a multilayer system consisting of layers that have an alternatingly high and low refractive index. Preferably, the layers are made from a grid-adapted semiconductor material.
IPC 1-7
IPC 8 full level
H01L 27/15 (2006.01); H01L 33/00 (2006.01); H01L 33/40 (2010.01); H01S 5/026 (2006.01); H01S 5/187 (2006.01)
CPC (source: EP)
H01L 27/15 (2013.01); H01L 33/405 (2013.01); H01L 33/10 (2013.01); H01L 2224/48463 (2013.01); H01L 2224/49107 (2013.01)
Citation (search report)
See references of WO 9957788A2
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
DE 19819543 A1 19991111; CN 1298553 A 20010606; EP 1075710 A2 20010214; JP 2002514015 A 20020514; WO 9957788 A2 19991111; WO 9957788 A3 19991229
DOCDB simple family (application)
DE 19819543 A 19980430; CN 99805623 A 19990416; DE 9901164 W 19990416; EP 99927678 A 19990416; JP 2000547678 A 19990416