Results 21 to 30 of about 3,712 (185)

Laser Processing of Transparent Wafers with a AlGaN/GaN Heterostructures and High-Electron Mobility Devices on a Backside

Micromachines, 2021
Sapphire and silicon carbide substrates are used for growth of the III-N group heterostructures to obtain the electronic devices for high power and high frequency applications.
Simonas Indrišiūnas, Evaldas Svirplys, Justinas Jorudas, Irmantas Kašalynas   +3 more
doaj   +1 more source

Micromachining of AlN and Al2O3 Using Fiber Laser

Micromachines, 2014
We report on high precision high speed micromachining of Al2O3 and AlN using pulsed near infrared fiber laser. Ablation thresholds are determined to be 30 J/cm2 for alumina and 18 J/cm2 for aluminum nitride.
Florian Preusch, Benedikt Adelmann, Ralf Hellmann   +2 more
doaj   +1 more source

Molecular Dynamics Simulation Study of Liquid-Assisted Laser Beam Micromachining Process

Journal of Manufacturing and Materials Processing, 2018
Liquid Assisted Laser Beam Micromachining (LA-LBMM) process is an advanced machining process that can overcome the limitations of traditional laser beam machining processes. This research involves the use of a Molecular Dynamics (MD) simulation technique
Vivek Anand Menon, Sagil James
doaj   +1 more source

Micromachining of Invar Foils with GHz, MHz and kHz Femtosecond Burst Modes

Micromachines, 2020
In this work, a burst mode laser is used for micromachining of 20 µm–250 µm thick Invar (Fe64/Ni36) foils. Holes were drilled by firing multiple pulses transversely onto the sample without moving the beam (percussion drilling).
Simas Butkus, Vytautas Jukna, Domas Paipulas, Martynas Barkauskas, Valdas Sirutkaitis   +4 more
doaj   +1 more source

Excimer Laser Three-Dimensional Micromachining Based on Image Projection and the Optical Diffraction Effect

Applied Sciences, 2018
An excimer laser three-dimensional (3D) micromachining system is proposed based on a mask image projection method and the optical diffraction effect. The effects of optical diffraction on the laser machining rate are evaluated using a hole-arrayed mask ...
Yu-Hsuan Hung, Hung-Liang Chien, Yung-Chun Lee   +2 more
doaj   +1 more source

Experimental and Modeling Study of Liquid-Assisted—Laser Beam Micromachining of Smart Ceramic Materials

Journal of Manufacturing and Materials Processing, 2018
Smart ceramic materials are next generation materials with the inherent intelligence to adapt to change in the external environment. These materials are destined to play an essential role in several critical engineering applications.
Mayur Parmar, Sagil James
doaj   +1 more source

High performance laser induced plasma assisted ablation by GHz burst mode femtosecond pulses

Opto-Electronic Advances
High performance laser micromachining based on the combination of GHz burst mode femtosecond pulses irradiation and laser induced plasma assisted ablation can open a new avenue for high-quality and high-efficiency micromachining of single crystalline ...
Jingbo Yin, Yulong Zhao, Minghui Hong
doaj   +1 more source

Prediction of Thermal Damage upon Ultrafast Laser Ablation of Metals

Molecules, 2021
Ultrafast lasers micromachining results depend on both the processing parameters and the material properties. The obtained thermal effects are negligible if a good combination of processing parameters is chosen.
Liliana Cangueiro, José Antonio Ramos-de-Campos, David Bruneel   +2 more
doaj   +1 more source

In Situ Magnetic Ordering and Microfabrication of Liquid Crystal Networks with Discretized Alignment

Advanced Functional Materials, EarlyView.
Miniaturizing liquid crystal network actuators typically demands costly laser writing or digital light processing. A low‐cost photolithography platform couples rotating photomasks with a Halbach magnetic array to discretize in‐plane molecular alignment down to 50 µm, producing programmable, light‐responsive grippers, checkerboards, and origami‐inspired
Matthew Gene Scarfo, Ramón S. Herrera Restrepo, Irving Hafed Tejedor Garcia, Hamed Shahsavan   +3 more
wiley   +1 more source

Stretchable Microelectrode Arrays for Electro‐Mechanical Probing of Brain Spheroids

Advanced Healthcare Materials, EarlyView.
A multimodal device featuring kirigami‐patterned stretchable microelectrode arrays enables concurrent mechanical actuation and electrophysiological recording of brain spheroids. The platform supports multiple loading regimes and reveals mechanically induced modulation of spontaneous network activity in 3D neural tissue models.
Eleonora Martinelli, Ivan Furfaro, Flavius Timis, João Marques, Tala El Kaissi, Desirée Maulà, Laurine Kolly, Julian Bär, Sina Röllin, Scott Erickson, Laetitia Nikles, Benoît Delaup, Camille Delgrange, Loris Gomez Baisac, Luc Stoppini, Adrien Roux, Giuseppe Schiavone, Stéphanie P. Lacour   +17 more
wiley   +1 more source