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.

Effect of Mass Adsorption on a Resonant NEMS

J. J. Ruz Martinez
Instituto de Microelectronica de Madrid
Tres Cantos
Madrid, Spain

The motion of a resonant NEMS has been widely studied for many different applications such as structural mechanics in engineering, ultra sensitive mass spectrometers or the well known Atomic Force Microscope. The study of the eigenfrequencies of such structures is very important, and nowadays there are good theoretical methods to accurately predict such eigenfrequencies. When a little mass is ...

RFID-Enabled Temperature Sensor

I.M. Abdel-Motaleb[1], K. Allen [1]
[1]Department of Electrical Engineering, Northern Illinois University, DeKalb, IL, USA

The design of a RFID-enabled temperature sensor is described in this paper. In this sensor, a change in temperature causes structural beams to bend, which results in a proportional displacement of the plates of the capacitor. Plates\' displacement results, in turn, in changing the value of its capacitance. The capacitor of the sensor is coupled to the LC resonant network of a passive RFID tag. ...

Mechanical Model of RF MEMS Capacitor Structures

R. Chatim[1]
[1]University of Kassel, Kassel, Germany

In order to design an RF MEMS based device, it is beneficial to have information concerning mechanical behavior. For model verification purpose, solution offered by simulation software equipped with predefined physics application is one valuable way to provide initial reference. To avoid unwanted particular total strain in RF MEMS structures, a compensation layer can be utilized. When the number ...

µHeater on a Buckled Cantilever Plate for Gas Sensor Applications

A. Arpys Arevalo Carreno[1], E. Byas[1], I.G. Foulds[1]
[1]King Abdullah University of Science and Technology, Thuwal, Mecca, Kingdom of Saudi Arabia

In semiconductor gas sensors, the base of the gas detection is the interaction of the gaseous species at the surface of the semiconducting sensitive material. Since the chemical reactions at the surface of the sensor material are functions of temperature. We simulate our µHeater design on a Buckled Cantilever Plate (BCP). Such structure allows the sensor to be suspended for thermal insulation. ...

Design and Implementation of MEMS based Blood Viscometer for INR Measurement

J. G. Immanuel[1], K. Poojitha[1], B. Viknesshwar[1], A. Gupta[1]
[1]PSG College of Technology, Peelamedu, Coimbatore, Tamil Nadu, India

The paper brings out the designing and implementation of blood viscosity monitoring device that gives us the INR to measure the effectiveness of anti coagulant medications .When a blood vessel is damaged, clotting cascade begins that results in blood clot. This process is affected by several medical conditions where it becomes mandatory for a patient to intake anti-coagulants. Thus to monitor ...

Design of a MEMS Resonator for a Centre Frequency Greater than 26.35 MHz and Temperature Coefficient Frequency Less than 0.5 ppm

S.Manikandan[1], R.Radeep krishna[1]
[1]Kalasalingam University, Department of ECE, Srivilliputtur ,Krishnan koil, Tamil Nadu, India

The variability of the design parameters caused by material properties like thermal conductivity is the major challenge in Micro Electromechanical System (MEMS). In resonator design the basic problem is that the frequency changes with temperature variation and quantitative explanation with respect to this varies. The change can be attributed to the stability in terms of frequency drift in parts ...

The Effect of Electrochemical Micro-Milling by Rotating Magnetic Field

H-Y. Shen[1], H-P. Tsui[1], J-C .Hung[1], S-Y. Lin[2], and B-H. Yan[2]
[1]Metal Industries Research and Development Centre, Taichung, Taiwan
[2]National Central University, Chungli, Taiwan

In this work, the process of micro-channels in electrochemical micro-milling by using rotating magnet assisted helical tool is presented. The results show helical tool and Lorentz force of the rotating magnetic field that enhance the renewal of the electrolyte and machining efficiency. The feed rate can be raised under the magnetic field assisted in terms of experimental results; moreover, the ...

Design and Simulation of MEMS-based Sensor for Artificial Hand

P. Prema[1], Sakthivishnu.R[1], Sowmya. R[1], Chandra Devi K[1], Meenakshi Sundaram. N[1]
[1]PSG College of Technology, Coimbatore, Tamil Nadu, India

An artificial hand is the one that replaces the hand lost through trauma, disease, or congenital conditions. The proposed design is to simulate a sensor, used in prosthetic hand so as to measure the pressure required to hold the object, using COMSOL Multiphysics®. The physical parameters such as size, shape and mass of the object were optimized so as to hold an object. The weight of the object ...

FEM Study on Contactless Excitation of Acoustic Waves in SAWDevices

A. K. Namdeo[1], N. Ramakrishna[2], H. B. Nemade[1,2], and R. P. Palathinkal[1]

[1] Department of Electronics and Communication Engineering, Indian Institute of Technology Guwahati, Assam, India
[2] Centre for Nanotechnology. Indian Institute of Technology Guwahati, Assam, India

In this paper a finite element method(FEM) study of a surface acoustic wave (SAW)device excited by electrostatic coupling method is performed by using COMSOL Multiphysics. We have modeled a Rayleigh wave type SAW device by choosing YZ Lithium niobate as the substrate. The effect of external radio frequency (RF) field to the SAW device is analyzed. The effect of distance between the contactless ...

COMSOL API Based Toolbox for the Mixed-Level Modeling of Squeeze-Film Damping in MEMS: Simulation and Experimental Validation

M. Niessner[1], G. Schrag[1], J. Iannacci[2], and G. Wachutka[1]
[1]Institute for Physics of Electrotechnology, Munich University of Technology, Munich, Germany
[2]MEMS Research Unit, Fondazione Bruno Kessler, Povo di Trento, Italy

We present an easy-to-use toolbox for the automated generation of reduced-order mixed-level models for the evaluation of squeeze-film damping in microelectromechanical systems. The toolbox is programmed in JAVA and heavily exploits the functionality provided by the COMSOL API. The results obtained from mixed-level model simulation performed in COMSOL Multiphysics agree very well with ...