Here you will find presentations given at COMSOL Conferences around the globe. The presentations explore the innovative research and products designed by your peers using COMSOL Multiphysics. Research topics span a wide array of industries and application areas, including the electrical, mechanical, fluid, and chemical disciplines. Use the Quick Search to find presentations pertaining to your application area.

Surface Acoustic Wave Based MEMS Resonator

S. Dixit[1], R. C. Jain[1]
[1]Jaypee Institute of Information Technology, Noida, Uttar Pradesh, India

Surface Acoustic Waves (SAW) is the acoustic wave that propagates along the surface of the substrate with amplitude decaying exponentially away from the surface. A basic SAW device consists of two IDT’s on a piezoelectric substrate such as quartz. Surface Acoustic Wave can be generated by application of a voltage to an IDT deposited on the surface of a piezoelectric substrate. The ...

Simulation of ZnO Enhanced SAW Gas Sensor

H. du Plessis[1], W. Perold[1]
[1]University of Stellenbosch, Stellenbosch, South Africa

Surface acoustic wave (SAW) devices are widely used for their sensing capabilities and gas sensing is only one of many uses. There is an ever increasing need to make them as effective as possible by adding nanomaterials to the device. In this study a two-port delay-line structure with 128YX lithium niobate was simulated with COMSOL Multiphysics® in the form of a 2D cross-section. ZnO nanopillars ...

Design and Multiphysics Analysis of MEMS Capacitive Microphone

N. J. Krishnapriya[1], M. R. Baiju[1]
[1]College of Engineering, Trivandrum, Kerala, India

In this paper, design and analysis of a novel MEMS capacitive microphone which uses corrugations and perforations in diaphragm is presented. The corrugation and perforation in diaphragm reduces the residual stress and increases the mechanical sensitivity of diaphragm. Instead of the perforated back plate, holes have been made on the diaphragm. Therefore, potassium hydroxide (KOH) etching can be ...

Anisotropic Damping in MEMS Oscillator

S. Silvestrini [1],
[1] Delft University of Technology, Delft, Netherlands

The analyzed MEMS oscillator is composed by a spring (beam) supported mass that needs to vibrate with a high Q-factor in the horizontal plane. Nevertheless, the transverse motion needs to be highly damped (low Q-factor). The purpose of the work was to explore different system configurations to determine the most suitable one for the scope of the device. Different parameters were varied to sweep ...

Characterization of a Tonpilz Transducer and Performance Analysis for a MEMS-Transducer Array

V. Vadde, and B. Lakshmi G

In this paper, we develop and analyze a standard piezoacoustic Tonpilz-transducer model for underwater acoustics in Comsol by addressing the attendant piezoelectric and pressure acoustic multiphysics phenomena. Transducer properties that are studied and characterized are the center frequency, bandwidth, linearity, sensitivity, and noise figure. In an effort to miniaturize the transducer, a ...

COMSOL Multiphysics® Software Simulation of a Dual-axis MEMS Accelerometer with T-Shaped Beams

C. Zheng [1], X. Xiong [1], J. Hu [2]
[1] Department of Electrical and Computer Engineering, University of Bridgeport, Bridgeport, CT, USA
[2] Department of Mechanical Engineering, University of Bridgeport, Bridgeport, CT, USA

Introduction: Inertial navigation requires acceleration measurement along all three degree-of-freedoms. Most accelerometers are designed to measure acceleration along a single sensitive direction. For complete inertial sensing, a move effective accelerometer which can sense acceleration along multiple axes is needed. In this research, a dual-axis MEMS (Microelectromechanical Systems) ...

Modeling and Simulation of Dual Application Capacitive MEMS Sensor - new

A. Ravi[1], R. Krishna[1], J. Christen[1]
[1]Arizona State University, Tempe, AZ, USA

Capacitive MEMS sensors offer high spatial resolution, sensitivity and good frequency response. In this paper, we present a circular membrane capacitive MEMS device that finds use both as capacitive micromachined ultrasonic transducer (CMUT) and pressure sensor. The MEMS device is first designed and simulated to work as a CMUT operating at about 5 MHz frequency. The device can also function as a ...

Design and Simulation of High-Throughput Microfluidic Droplet Dispenser for Lab-on-a-Chip Applications - new

C. Jin[1], X. Xiong[2], P. Patra[1], R. Zhu[1], J. Hu[3]
[1]Department of Biomedical Engineering, University of Bridgeport, Bridgeport, CT, USA
[2]Department of Electrical and Computer Engineering, University of Bridgeport, Bridgeport, CT, USA
[3]Department of Mechanical Engineering, University of Bridgeport, Bridgeport, CT, USA

Digital Microfluidic Biochip (DMFB) has been widely used in Lab-on-a-Chip (LoC) for disease diagnosis and treatment applications. To quickly convert traditional analog fluidic sample into digital droplets for DMFB processing, a high-throughput microfluidic droplet dispenser device is needed. In this paper, a high-throughput analog-to-digital microdroplet dispenser for Lab-on-a-Chip application ...

Simulation of a Voltage Controlled Resistor Mimicking the Geometry of a MOSFET Device with Graphite Channel - new

M. Bhattacharjee[1], N. Mandal[1], H. B. Nemade[1], D. Bandyopadhyay[1]
[1]Indian Institute of Technology Guwahati, Guwahati, Assam, India

A Voltage Controlled Resistor (VCR) is simulated by replacing the semiconductor channel of a MOSFET device by graphite and embedding Si nanoparticles near the insulator-channel interface. The change in output drain current is found to depend on the thickness and relative permittivity of the insulator film together with the loading of Si nanoparticles. A material with higher dielectric ...

MEMS Electrostatic Acoustic Pixel

A. Arevalo [1], D. Conchouso [1], D. Castro [1], I. G. Foulds [2],
[1] Computer, Electrical, & Mathematical Sciences & Engineering, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
[2] The University of British Columbia, School of Engineering, Vancouver, BC, Canada

The growth of the electronics industry demand better components for the electronic systems. Such components need to be improve to keep up with the evolution of the digital era. The loudspeaker design has not been changed for almost a century [1-5]. The acoustic transducer is the last analogue component needed for a true digital audio system. We want to validate the feasibility of using an ...