Dr. Ravi N. Bathe Profile

Dr. Ravi N. Bathe

Scientist-E at ARCI

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Proceedings Article | 8 October 2014 Paper

Laser microprocessing technologies for automotive, flexible electronics, and solar energy sectors

Suwas Nikumb, Ravi Bathe, George Knopf

Proceedings Volume 9180, 918005 (2014) https://doi.org/10.1117/12.2064279

KEYWORDS: Laser applications, Femtosecond phenomena, Thin films, Copper indium gallium selenide, Graphene, Flexible circuits, Pulsed laser operation, Solar energy, Manufacturing, Solar cells

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Laser microprocessing technologies offer an important tool to fulfill the needs of many industrial sectors. In particular, there is growing interest in applications of these processes in the manufacturing areas such as automotive parts fabrication, printable electronics and solar energy panels. The technology is primarily driven by our understanding of the fundamental laser-material interaction, process control strategies and the advancement of significant fabrication experience over the past few years. The wide-ranging operating parameters available with respect to power, pulse width variation, beam quality, higher repetition rates as well as precise control of the energy deposition through programmable pulse shaping technologies, enables pre-defined material removal, selective scribing of individual layer within a stacked multi-layer thin film structure, texturing of material surfaces as well as precise introduction of heat into the material to monitor its characteristic properties are a few examples. In this research, results in the area of laser surface texturing of metals for added hydrodynamic lubricity to reduce friction, processing of ink-jet printed graphene oxide for flexible printed electronic circuit fabrication and scribing of multi-layer thin films for the development of photovoltaic CuInGaSe₂ (CIGS) interconnects for solar panel devices will be discussed.

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