IMG research focuses on micro- and nanosystems for healthcare, energy, security, aerospace, transportation, consumer electronics, and other industries. Efforts include design, fabrication, characterization, and ultimately deployment of micro and nanotechnologies for a wide variety of applications. IMG is playing a leading role in the MIST Center (Multi-functional integrated system technology), an NSF I/UCRC program.
Read the latest Annual Report for more information.
Chris Meyer will present "Micromachined Inductors and Transformers for Miniaturized Power Converters." All are welcome to attend.
Refreshments will be provided.
Speaker: Jessica Meloy
Introduction: The time-resolved characterization of complex wall-bounded flow fields is difficult and unachievable with the current set of research tools. At the University of Florida the Interdisciplinary Microsystems Group (IMG) has teamed with FCAAP to develop the next generation of instrumentation grade sensors for aerospace applications. Specifically, microelectromechanical systems (MEMS) technology is being used to develop sensor systems for reliable direct time-resolved shear stress measurement and fill this instrumentation void. IMG has developed a robust miniaturized package for integration into flow control studies currently being conducted at both the Advanced Aero-Propulsion Laboratory at Florida State University and at IMG wind tunnel facilities at the University of Florida. The specific sensor system being utilized in these studies is capable of measuring shear stress values as low as 1mPa with a sensitivity of 1.7mV/V/Pa and at least 80dB rejection to cross sensitivities. In this seminar the sensor system’s circuitry and package development will be discussed.
Speaker: Yaxing Zhang
Introduction: The presentation will focus on the concept, theory, and demonstration of electromechanical inductors that couple an electrical conductor with a mechanical energy storage component in order to boost the electrical inductance over a specific frequency band. Measurements of mesoscale prototypes indicate an inductance boost >10,000x compared to static electrical devices. The results show as a step toward ultra-high-inductance-density microfabricated devices intended to dramatically reduce the size and mass of switched-mode power supplies.
Refreshments will be served.
Speaker: Wenjing Liu
Introduction: This talk is about the design, fabrication and characterization of a piezoelectrically actuated high-fill-factor tip-tilt-piston (TTP) micromirror with nearly zero initial tilt and no lateral shift during scanning. The piezoelectric material is a sol-gel lead zirconate titanate (PZT) thin film with a Zr/Ti ratio of 53/47. The zero-initial-tilt (ZIT) and lateral-shift-free (LSF) of the mirror plate is achieved by a folded, three-segment piezoelectric unimorph actuator design. The piezoelectric unimorph actuation beams consist of Pt/Ti/PZT/Pt/Ti/SiO2 multilayers, which are released via undercutting the substrate silicon.
Refreshments will be served.
Speaker: Hongzhi Sun
Introduction: IMUs have wide automotive, consumer electronics, and medical applications. The focus of this talk is on a three-axis accelerometer and two single-axis gyroscopes. The presentation will include the CMOS-MEMS process, the interface circuit design, and the characterizations for the monolithic IMU.
Refreshments will be served.
Nik Zawodny will present the basic principles of Laser Doppler Velocimetry (LDV) as well as a cataloging of the LDV processing and data analysis capabilities available to IMG members. LDV is a non-intrusive optical technique for measuring fluid particle velocities at a single point. LDV is a highly stable measurement process that at times can be superior to Particle Image Velocimetry (PIV), with its ability to measure velocities in regions that cannot be illuminated with a laser light sheet.
Presenter: Chris Bahr, Ph.D.
Description: In aeroacoustic testing, the determination of acoustic source locations in an experiment is often critical, as the sources must be located before they can be mitigated. One of the most common techniques used to determine source locations, known as beamforming, utilizes an array of microphones and acoustic source modeling.
In this presentation, the classic delay-and-sum (DAS) beamformer is discussed in both the time and frequency domains from a theoretical perspective. Common implementations of the beamformer as used in wind tunnel testing are then shown, with discussion of appropriate usage and corrections.
Matias Oyarzun will give a tutorial on how to correctly use the Laser Displacement Sensor which is typically used to measure vibrations. All of IMG is encouraged to attend.
Refreshments will be provided.
Guest speaker Mike Siemer, the owner of Mydea Technologies, will speak to IMG about modern day rapid prototyping methods and the rapid prototyping capabilities of Mydea Technologies. Sample fabricated specimens will be available to see during the seminar. All of IMG is encouraged to attend.
Refreshments will be provided.
Please note that this week's seminar is from 4PM (not 3PM) due to speaker's conflict.
Snacks and drinks will be served
Speaker: David Senior
Abstract: Highly compact metamaterial devices are demonstrated by combining the composite right-left handed transmission line approach with a multilayer surface micromachined fabrication processusing SU8 as a dielectric layer. Multiband microwave metamaterial applications for ISM frequencies of 2.4GHz and 5.8GHz are implemented The use of microfabrication techniques eliminates the necessity of using surface mounting device (SMD) based lumped components and makes the CRLH structures compatible and integrable with CMOS/MEMS processes while allowing batch fabrication of multiple devices.
