Title :
Embossed ceramic reflectors with nano dispersive coatings for compact optoelectronic systems
Author :
Buss, W. ; Richter, H. ; Bartnitzek, Th ; Brode, W. ; Heymel, A. ; Walther, Th
Author_Institution :
Fraunhofer Inst. for Appl. Opt. & Precision Eng. IOF, Jena, Germany
Abstract :
Modern optoelectronic elements used in harsh environments like high ambient temperatures and UV-radiation are often equipped with ceramic housing and substrates which include integrated optical elements. This reflectors or beam shaping elements are realized by dead-mold casting or embossing technologies. The present paper describes a combined embossing, infiltration and coating process for realizing smooth reflector surfaces into Low Temperature Cofired Ceramics (LTCC) substrates. The measurement results of the reflection coefficients are comparable with full-metal aluminum-surfaces. The main fields of application so far have primarily been grooves for edge-emitter UV-LEDs with forward scattering reflector areas.
Keywords :
casting; ceramic packaging; coatings; embossing; light emitting diodes; nanotechnology; optical elements; beam shaping element; coating process; compact optoelectronic system; dead-mold casting techynology; edge-emitter UV-LED; embossed ceramic reflector; embossing technology; infiltration process; low temperature cofired ceramics substrate; nanodispersive coating; reflection coefficient; smooth reflector surface; Coatings; Embossing; Optical reflection; Optical scattering; Optical variables measurement; Rough surfaces; Surface roughness; LED beam shaping and alignment; LTCC reflector; coating; embossing; infiltration;
Conference_Titel :
Microelectronics and Packaging Conference (EMPC), 2011 18th European
Conference_Location :
Brighton
Print_ISBN :
978-1-4673-0694-2
