Laser bonding

Laser bonding

Laser-Based Fabrication of Microflow Cytometers with Integrated Optical Waveguides

Published in Frances S. Ligler, Jason S. Kim, The Microflow Cytometer, 2019

Mark Dugan, Ali A. Said, Tom Haddock, Philippe Bado, Yves Bellouard

Recently direct femtosecond laser bonding of fused silica has also been demonstrated. This approach is still in its infancy and presently is too slow to be commercially viable for the fabrication of microflow cytometers.27

eBlock37 Microreactor Electrical Demonstration Unit

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Journal Information

Published in Nuclear Technology, 2023

L. M. Gaspar, D. A. Giordano, N. A. Greenfield, S. J. Kim, F. A. Kubic, M. R. Middlemas, A. J. Pizarro, W. J. Saeger, K. M. Sweetland, R. S. Reid

The Core37 subassembly shown in Fig. 3 is approximately 1 m long and contains a total of 91 holes: 37 of these holes house sodium heat pipe evaporators and 54 holes are for electrical cartridge heater installation. The web thickness between each of the holes is approximately 1.5 mm. A variety of fabrication techniques were considered to form the subassembly, including conventional machining and additive manufacturing of various length segments. Segment joining by hot isostatic pressing (HIP), vacuum hot pressing, laser bonding, and diffusion bonding was tested. Although electron-beam welding was met with poor results, both the HIP and diffusion bonding trials proved successful. Additional diffusion bonding trials are currently being performed on a subscale core block. Findings will aid refinement of the diffusion bonding processes for full-scale Core37 implementation.

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Laser-Based Fabrication of Microflow Cytometers with Integrated Optical Waveguides

eBlock37 Microreactor Electrical Demonstration Unit