News and events of David Arnold's Research Group

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Large-area Manufacturing of Integrated Devices with Nanocomposite Magnetic Cores

As predicted by Moore's "law", the past few decades have seen massive reductions in the size of integrated circuits, enabling the portable, handheld devices now in everyday use. However, the components that power these devices have not experienced a similar size reduction. For example, the power adapter of a laptop computer is only modestly smaller than that two decades ago, and the printed circuit board inside a smart phone must dedicate between 20% and 40% of the board area for power conversion and management. To date, efforts towards miniaturization have been limited by both materials and manufacturing challenges. To address this gap, this research will study nanomanufacturing processes to facilitate the scalable synthesis of high quality magnetic nanoparticles and nanocomposite core materials and the fabrication of compact power inductors and transformers through assembly of these nanomaterials in a manner that is compatible with current manufacturing processes, such as silicon wafer or printed circuit board fabrication. This compatibility will enable fully integrated and compact system-on-chip or system-in-package power solutions. This research will be accomplished by fostering collaboration among disciplines including materials science, chemical engineering and electrical engineering. It will foster diversity in the profession by involving high school and undergraduate students in research activities and by broadening participation through the inclusion and engagement of women and underrepresented groups.

IMG @ Napa Microsystems Workshop 2017

IMG will be well-represented at the upcoming Napa Microsystems Workshop in August 2017:

Thick-Film Magnetic Materials for Integrated Microwave Systems (Oral)
X. Wen, Y. Wang, S. Hwangbo, Y.-K. Yoon, and D.P. Arnold
University of Florida, USA

A Nonlinearly Coupled Aluminum Nitride Matrix for Phase-Synchronous Reference Generation (Oral)
M. Ghatge and R. Tabrizian
University of Florida, USA

Observation of Acoustoelectric Amplification at Aluminum Nitride-Germanium Interface (Poster)
M. Ghatge, K. Kallam, and R. Tabrizian
University of Florida, USA

The 2017 Napa Microsystems Workshop is the fourth workshop in the Transducer Research Foundation's Napa Institute Series. This west-coast workshop shares a common heritage with the TRF's highly-regarded Hilton Head Solid-State Sensors, Actuators, and Microsystems Workshop.

SURF Students in IMG

IMG is pleased to be hosting 3 students in the inaugual Summer Undergraduate Research at Florida (SURF) program, a 10-week immersive research experience for high-performing undergrads.  The SURF cohort consists of 40 students from 23 universities in 16 states, as well as Puerto Rico. Please welcome:

Chip-Scale MEMS Receivers for Low-Power Wireless Charging

There is an increasing demand for wireless power charging of mobile electronic devices, electric vehicles, biomedical implants and IoT sensor networks. Many of the already available wireless power transmission systems are based on inductive coupling and the size ranges in the cm’s scale, linked to the large surface area requirement. A competing technology is based on an RF approach, with small size chip but impractical power levels of pW to µW, and efficiency close to unity. The alternative working principle that we propose results in a more compact solution that can be reduced to mm’s chip size while producing reasonable output power (1 mW range) at low frequency ranges (50 Hz to 1 kHz).

We have developed an electrodynamic wireless power transmission (EWPT) system that relies on the magnetic-to-mechanic-to electrical conversion from a transmitter to a remote resonator, through electrodynamic transduction. The mechanical motion of a permanent magnet is converted into electrical power, when the magnet is set in motion/rotation, by a time-varying magnetic field, next to the receiver windings.