NEWS 23 February 2022

Picosecond ultrasonics for nanometer resolution

Applying ultrasound in the Megahertz range for the investigation of the human body is a well-known medical practice. But using ultrasound to study nanometer structures requires ultrahigh sound frequencies in the Gigahertz range.

But using ultrasound to study nanometer structures requires ultrahigh sound frequencies in the Gigahertz range. Delft University of Technology researcher Gerard Verbiest and his team succeeded in reaching vertical nanometer accuracies thanks to the photoacoustic effect. But achieving these accuracies in lateral directions required a second trick, as described in this Mikroniek article: the application of an atomic force microscope. (Image courtesy of TU Delft)

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References

Order of frictions and stiffnesses…

For lumped systems consisting of different frictions and stiffnesses, there has been confusion in literature about hysteresis curves and virtual play for many decades.

Make it clean

In mid-April, the second edition of the Manufacturing Technology Conference and the fifth edition of the Clean Event were held together, for the first time, at the Koningshof in Veldhoven (NL).

Bringing particles to light

Particle contamination monitoring and cleanliness control are fundamental to micromanufacturing processes across diverse industries to achieve cost-effective production of high-quality and reliable microscale devices and components.