Dr. Todd Ballen Profile

Dr. Todd Ballen

at 3M Co

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Publications (2)

Proceedings Article | 12 February 2010 Paper

High efficiency green LEDs using II-VI color converters

Thomas Miller, Michael Haase, Xiaoguang Sun, Bing Hao, Junying Zhang, Terry Smith, Todd Ballen, Junqing Xie, Amy Barnes, Fedja Kecman, Joseph Yang, James Thielen, Catherine Leatherdale, Ralph Wirth, Andreas Biebersdorf, Karl Engl, Stefan Groetsch

Proceedings Volume 7617, 76171A (2010) https://doi.org/10.1117/12.853330

KEYWORDS: Light emitting diodes, Green light emitting diodes, Quantum wells, Semiconducting wafers, Temperature metrology, Gallium nitride, Glasses, Group II-VI semiconductors, Luminescence, Blue light emitting diodes

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Proceedings Article | 1 June 1999 Paper

Micro-optical elements fabricated and replicated in semiconductor materials

Fredrik Nikolajeff, James Leger, Todd Ballen

Proceedings Volume 3633, (1999) https://doi.org/10.1117/12.349337

KEYWORDS: Gallium arsenide, Etching, Polymers, Nickel, Polymer thin films, Micromirrors, Reactive ion etching, Plasma, Semiconductor materials, Prisms

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