We report fabrication techniques for high aspect ratio vertical light pipes in a 10μm thick SiO2 layer. Light pipes with an aspect ratio of 2.8:1 and a sidewall angle of 89.5o were demonstrated.

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Conference Frontiers in Optics, FiO 2009
Ye, W.N, Duane, P. (Peter), Wober, M. (Munib), & Crozier, K.B. (Kenneth B.). (2009). Fabrication of high aspect ratio optical light pipes. In Optics InfoBase Conference Papers.