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Open Access research with a real impact on health...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by Strathclyde researchers, including by researchers from the Physical Activity for Health Group based within the School of Psychological Sciences & Health. Research here seeks to better understand how and why physical activity improves health, gain a better understanding of the amount, intensity, and type of physical activity needed for health benefits, and evaluate the effect of interventions to promote physical activity.

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Impact of laser scribing for efficient device separation of LED components

Illy, E.K. and Knowles, M.R.H. and Gu, E. and Dawson, M.D. (2005) Impact of laser scribing for efficient device separation of LED components. Applied Surface Science, 249 (1-4). pp. 354-361. ISSN 0169-4332

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Abstract

Laser scribing of light emitting diode (LED) components on sapphire substrates is shown in this paper to be a viable method of device separation. Three key measurements revealing the effects of UV laser scribing on the LED component performance are discussed and compared for laser scribing at 255 and 355 nm. The differences in these two UV wavelengths are further discussed in terms of quality; comparing pulse energies and pulse repetition frequencies for UV ablation of sapphire. In general, these results prove laser processing can be used as an effective high volume manufacturing procedure for substrate separation.