By: Xinwei Wang Department of Mechanical Engineering, Iowa State University This work reports on the pioneering molecular dynamics (MD) modeling of shock waves in laser-material processing. For pulsed laser-assisted material processing with an ambient gas, the fast melting, vaporization, and phase explosion of the target is a very complicated process and will form a strong […]
Laser Microprocessing
Laser Joining for Packaging in MEMS Applications and Micro-Devices
By: Norbert Lorenz In recent years the interest in micro-devices, including Micro-Electro-Mechanical-Systems (MEMS), from research institutions, industry and the press has risen considerably. However one of the persisting challenges in the fabrication of such devices is the packaging process. A number of different bonding techniques have been developed but in general they require the entire […]
Microdrilling of Sheet Materials with Femtosecond Laser Pulse Shaped by Computer Generated Hologram
By: Hayato Kawashima, Masahiro Yamaji, Jun’ichi Suzuki, Shuhei Tanaka We have developed a three-dimensional (3D) femtosecond laser processing method using a computer generated hologram (CGH) that generates a 3D structure inside transparent materials. Since 3D structure can be formed simultaneously with femtosecond laser pulses shaped by a CGH, our method is high efficient, and it […]
Laser Welding of Micro-VLE-Measurement Device and its Practical Application
By: Marika Hirvimäki, Heidi Piili, Arttu Jussila, Tuomas Purtonen, Matti Manninen, Petri Uusi-Kyyny, Aarne Sundberg, Ville Alopaeus, Antti Salminen Lappeenranta University of Technology, Finland Aalto University, Department of Biotechnology and Chemical Technology, Finland Machine Technology Centre Turku Ltd, Finland The knowledge of phase equilibrium is critical for the modeling and operation of reactors and separation units. […]
Design of a Microdistillation Column
By: Matti Manninen, Aarne Sundberg, Heidi Piili, Antti Salminen Lappeenranta University of Technology, Laser Processing Research Group, Finland Aalto University, Department of Biotechnology and Chemical Technology, Finland Machine Technology Centre Turku Ltd, Finland Distillation is the predominantly used separation method in chemical engineering. The device presented in this paper is called a microdistillation column, because the […]