Global Patent Index - EP 1075710 A2

EP 1075710 A2 2001-02-14 - LIGHT EMITTING SEMICONDUCTOR DEVICE

Title (en)

LIGHT EMITTING SEMICONDUCTOR DEVICE

Title (de)

LICHTEMISSIONS-HALBLEITEREINRICHTUNG

Title (fr)

DISPOSITIF SEMI-CONDUCTEUR A EMISSION DE LUMIERE

Publication

EP 1075710 A2 (DE)

Application

EP 99927678 A

Priority

  • DE 9901164 W
  • DE 19819543 A

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 (main, further and additional classification)

H01L 33/00

IPC 8 full level (invention and additional information)

H01L 27/15 (2006.01); H01L 33/40 (2010.01); H01S 5/026 (2006.01); H01S 5/187 (2006.01)

CPC (invention and additional information)

H01L 33/405 (2013.01); H01L 27/15 (2013.01); H01L 33/10 (2013.01)

Citation (search report)

See references of WO 9957788A3

Designated contracting state (EPC)

DE FR GB IT

EPO simple patent family

DE 19819543 A1 19991111; CN 1298553 A 20010606; EP 1075710 A2 20010214; JP 2002514015 A 20020514; WO 9957788 A2 19991111; WO 9957788 A3 19991229

INPADOC legal status


2003-07-23 [18W] WITHDRAWN

- Effective date: 20030526

2001-02-14 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000901

2001-02-14 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): DE FR GB IT