Cooling Concepts for High Power Density Magnetic Devices

New Metallization Concepts for High Power SAW Devices

Stress induced mass transport (acoustomigration) is the dominant failure mechanism in surface acoustic wave (SAW) devices. A strong microstructure damage of the metal finger electrodes by void and hillock formation results in an irreversible degradation of the electrical characteristics of the device. Copper based metallizations were applied to SAW technique using LiNbO3 and quartz substrates t...

Exploring novel high power density concepts for attractive fusion systems

The Advanced Power Extraction (APEX) study is aimed at exploring innovative concepts for fusion power technology (FPT) that can tremendously enhance the potential of fusion as an attractive and competitive energy source. Specifically, the study is exploring new and ‘revolutionary’ concepts that can provide the capability to efficiently extract heat from systems with high neutron and surface hea...

Ultra-thin carbon layer for high density magnetic storage devices

Storage density is presently doubling every year. This requires the read head to approach closer to the magnetic layer, and ever-thinner layers of carbon. Film thickness below 2 nm and roughness well below 1 nm are needed for the storage of ;1 Tby in . Here we present an analytical and functional characterisation of ultra-thin carbon nitride and pure carbon films produced by 2 magnetron sputter...

Spray cooling characteristics of nanofluids for electronic power devices

The performance of a single spray for electronic power devices using deionized (DI) water and pure silver (Ag) particles as well as multi-walled carbon nanotube (MCNT) particles, respectively, is studied herein. The tests are performed with a flat horizontal heated surface using a nozzle diameter of 0.5 mm with a definite nozzle-to-target surface distance of 25 mm. The effects of nanoparticle v...

Embedded Thermoelectric Devices for On-chip Cooling and Power Generation