2009-03-11

Oxford Instruments - TDI unites LED maker develop semi-polar GaN

Group III-nitride materials have been widely used for visible and ultraviolet LEDs and blue, violet laser diodes in the past decade. Most of these optoelectronic devices are typically fabricated on the conventional polar (0001) c-plane oriented substrate materials. Devices grown on the polar substrate orientation suffer undesirable spontaneous and piezoelectric polarization resulting in significant band bending in the quantum well. This reduces radiative recombination efficiency and lowers device performance.
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Cree LED, a Penguin Solutions brand (Nasdaq: PENG), today announced that it has filed a patent infringement lawsuit in the United States District Court for the Northern District of Illinois against Promier Products and Tractor Supply. The laws... READ MORE

Instrument Systems introduces the STA Stand‑Alone Screen Photometer — a modular, vehicle‑based measurement solution that combines the LumiCam 4000B imaging luminance camera with the new ACS 635 calibration source to deliver fast, high‑re... READ MORE