Searched for: subject:"MEMS"
(1 - 20 of 25)

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Barel, Marije (author)
At this moment there are more than 150 different designs of CMMA in existence. To aid the designer to develop a new or improved CMMA or choose what the design to use, a classification system is developed during the literature research. It is based on the geometrical advantage (GA) of the CMMA, and on the input and output port motion paths. Their...
master thesis 2017
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Spruit, Ronald (author)
Transmission electron microscopy is a powerful and commonly used tool to study nanoparticles, nanowires and 2D materials. It provides static information from the sample with atomic resolution, in high vacuum and at ambient temperature. However, in real processes, the environment is often different and dynamic.

MEMS-based sample...
master thesis 2017
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Chandrashekar, Abhilash (author)
Ever since its inception, graphene has been the subject of research in many parts of the
world. This is due to its exceptional mechanical and electrical properties, which makes it
ideal for NanoElectroMechanical (NEMS) devices. The inherent nature of NEMS devices,
includes low damping, large amplitudes of oscillation, resonant...
master thesis 2017
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Rietveld, Joyce (author)
MEMS devices are currently designed to avoid sliding and contacting parts due to friction and adhesion problems. In this work, the possibility to grow a low friction material locally on MEMS sidewalls is investigated. An overview of the lubricants proposed in the literature for the microscale is presented, and graphene is selected as a promising...
master thesis 2017
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van der Kaay, Michel (author)
Flex-to-rigid (F2R) is a technology platform for the fabrication of miniature partially flexible sensor systems for minimally invasive medical instruments. Because of the flexibility, these sensor systems can be wrapped around cylindrical medical instruments such as catheters or guidewires. F2R is a postprocessing technology whereby flexible...
master thesis 2017
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de Zeeuw, Jelmer (author)
We all experience the occasional electric shock when grabbing a doorknob. Similarly, such an electric shock can cause catastrophic damage in mechanical systems. The small spark that is seen to 'jump' through the air is actually the portion of the air that became electrically conductive, which is formally described as electrical breakdown. The...
master thesis 2017
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Wessels, J. (author)
master thesis 2016
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Thomas, S. (author)
Optical coherence tomography (OCT) probes rely on MEMS micro-scanners to provide fast and reproducible scans covering as much area as possible. A popular choice of actuators employed in this role are electrothermal bimorph actuators. They comprise of two layers of different materials which are rigidly joined together. Differential expansion...
master thesis 2015
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Van Bracht, S. (author)
Micro-electromechanical systems (MEMS) often require tuning to correct for fabrication errors such as changed dimensions or to adapt for a different scenario such as changed temperature. To prevent continuous power consumption for maintaining system behavior, a locking system can be added which does not require any power during operation. A new...
master thesis 2015
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Kumar, L. (author)
This thesis details the design of a self-oscillating MEMS resonator as a pressure sensor. A bi-layer circular diaphragm with a single center perforation is used as a pressure sensitive membrane which measures the absolute pressure of the surrounding medium. A novel aspect of the proposed sensor is that the resonator is made to oscillate by an...
master thesis 2014
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Verloop, W.A. (author)
In this Thesis report the modeling, design, simulation, fabrication and measurements done at the Resonant Air Quality Sensor is described. The sensor is based on a resonant system, made in a silicon wafer with MEMS technology. By depositing the particles to be measured on top of the mass, the total mass of these particles can be measured by...
master thesis 2013
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Atar, O.G. (author)
Not available because of confidentiality
master thesis 2013
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Morsink, D.W. (author)
Nowadays both fluorescence and scanning electron microscopy are highly developed imaging techniques that are commonly used in many fields of research. As both techniques have their own strengths and weaknesses, a combination of both techniques can complement each other in certain fields of research. The combination of these two imaging...
master thesis 2013
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Molenaar, E.P. (author)
master thesis 2013
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Kievit, E.W. (author)
Not available because of confidentiallity
master thesis 2013
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Pluimers, P.J. (author)
Precision engineering impacts every one, every day, by enabling the fabrication techniques and functions required for 21st technological revolutions. Various applications, from display technologies to sensor systems to optical networks make use of so called microelectromechanical systems (MEMS). Motions at micro level with monolithic structures...
master thesis 2012
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Tsiolis, G. (author)
A new fully integrated frequency reference has been designed, fabricated and measured. The goal of the design procedure has been high stability of the frequency over temperature variations. This should be achieved using a CMOS technology without MEMS and crystals, while being restricted by a very low power budget. The frequency is designed based...
master thesis 2011
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Li, S.J. (author)
Recently there has been an onset of fluidic filters fabricated using micro electro-mechanical systems (MEMS) technology. These filters, compared to conventional ones, are more accurate and precise due to the highly sophisticated techniques that are used to define and implement the separation mechanism. In order to contribute to this new field of...
master thesis 2011
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Hogervorst, R.P. (author)
This thesis is a part of the CLEMPS (Closed Loop Embedded MEMS-based Precision Stage) project. Within this project a MEMS-stage should be positioned using a feedback (displacement) signal with 10-nm accuracy over a 100 ?m range. This thesis investigates if thermal sensing can be used as a reliable sensing mechanism within the CLEMPS project....
master thesis 2010
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Cheng, A. (author)
This design mainly proposes a readout scheme for MEMS microphone with positive feedback to decrease the parasitic capacitance. It is designed in CMOS014 technology with a supply voltage of 3.3 V. The proposed architecture can increase the microphone’s sensitivity with a comparatively low bias voltage. It enables the microphone to achieve high...
master thesis 2009
Searched for: subject:"MEMS"
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