What is it about?
New ultra-thin glasses with thicknesses ranging from tens to hundreds of microns are already considered in consumer electronics display applications. It is quite obvious the extension to photonics applications where extreme flexibility of the substrates is requested.
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Why is it important?
The improvement in mechanical performance, specifically retained strength, for such ultra thin glasses glasses is achieved by composition design and ion exchange post-processing. The main physical effects to be considered are the introduction of residual stress profiles and refractive index modifications. Both aspects may interfere with flexible photonics application of these glass substrates. The physics of stress buildup and relaxation are discussed, as well as the impact on refractive index.
Perspectives
This study establishes design criteria for the mechanical stability of flexible glass substrates in extreme bending conditions either in terms of immediate failure or delayied failure by fatigue effects driven y subcritical crack growth.
Dr Guglielmo Macrelli
Read the Original
This page is a summary of: Ultra-thin glass as a substrate for flexible photonics, Optical Materials, August 2020, Elsevier,
DOI: 10.1016/j.optmat.2020.109994.
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