1.
Light Emitting Diodes as an alternative ambient illumination source in photolithography environment.
Opt Express
; 17(20): 17293-302, 2009 Sep 28.
Artigo
em Inglês
| MEDLINE
| ID: mdl-19907515
RESUMO
We explored an alternative light emitting diode (LED) - based solution to replace the existing yellow fluorescent light tubes (YFT) used in photolithography rooms. A no-blue LED lamp was designed and a prototype was fabricated. For both solutions, the spectral power distribution (SPD) was measured, the colorimetric values were calculated, and a visual comparison using Gretagmacbeth colorcharts was performed. The visual comparison showed that the LED bulb was better to render colors despite a low color rendering index (CRI). Furthermore, the LED bulb was tested in a photolithography room and there was no exposure to the photoresist even after 168 hours illumination.