@inproceedings{UhligGaudetLangaetal., author = {Uhlig, Sebastian and Gaudet, Matthieu and Langa, Sergiu and Schimmanz, Klaus and Conrad, Holger and Kaiser, Bert and Schenk, Harald}, title = {Electrostatically in-plane driven silicon micropump for modular configuration}, series = {Conference proceedings, The 3rd Conference on MicroFluidic Handling Systems (MFHS 2017), 4 - 6 October 2017, Enschede, The Netherlands}, booktitle = {Conference proceedings, The 3rd Conference on MicroFluidic Handling Systems (MFHS 2017), 4 - 6 October 2017, Enschede, The Netherlands}, publisher = {University of Twente}, address = {Enschede}, pages = {57 -- 60}, language = {en} } @misc{ConradGaudetSchenketal., author = {Conrad, Holger and Gaudet, Matthieu and Schenk, Harald and Uhlig, Sebastian}, title = {Mikromechanical devices with mechanical actuators}, language = {en} } @inproceedings{GaudetUhligStolzetal., author = {Gaudet, Matthieu and Uhlig, Sebastian and Stolz, Michael and Arscott, S. and Conrad, Holger and Langa, Sergiu and Kaiser, Bert and Schenk, Harald}, title = {Electrostatic bending actuators with liquid filled nanometer scale gap}, series = {MEMS 2017, the 30th IEEE International Conference on Micro Electro Mechanical Systems, Las Vegas, Nevada, USA, January 22-26 2017}, booktitle = {MEMS 2017, the 30th IEEE International Conference on Micro Electro Mechanical Systems, Las Vegas, Nevada, USA, January 22-26 2017}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-5090-5078-9}, pages = {175 -- 178}, language = {en} } @misc{LangaConradKaiseretal., author = {Langa, Sergiu and Conrad, Holger and Kaiser, Bert and Stolz, Michael and Gaudet, Matthieu and Uhlig, Sebastian and Schimmanz, Klaus and Schenk, Harald}, title = {Technological aspects of a new micro-electro-mechanical actuation principle: nano e-drive}, series = {Microsystem Technologies}, volume = {23}, journal = {Microsystem Technologies}, number = {1}, issn = {1432-1858}, doi = {10.1007/s00542-017-3360-6}, pages = {5697 -- 5708}, language = {en} } @misc{ConradSchenkKaiseretal., author = {Conrad, Holger and Schenk, Harald and Kaiser, Bert and Langa, Sergiu and Gaudet, Matthieu and Schimmanz, Klaus and Stolz, Michael and Lenz, Miriam}, title = {A small-gap electrostatic micro-actuator for large deflections}, series = {Nature Communications}, journal = {Nature Communications}, number = {6}, issn = {2041-1723}, doi = {10.1038/ncomms10078}, pages = {10078}, language = {en} } @inproceedings{SchenkConradGaudetetal., author = {Schenk, Harald and Conrad, Holger and Gaudet, Matthieu and Uhlig, Sebastian and Kaiser, Bert and Langa, Sergiu and Stolz, Michael and Schimmanz, Klaus}, title = {A novel electrostatic micro-actuator class and its application potential for optical MEMS}, series = {2016 International Conference on Optical MEMS and Nanophotonics,31 July-04 August 2016, Singapore, proceedings}, booktitle = {2016 International Conference on Optical MEMS and Nanophotonics,31 July-04 August 2016, Singapore, proceedings}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-5090-1036-3}, doi = {10.1109/OMN.2016.7565867}, pages = {Tu 3.11-1 -- Tu 3.11-2}, language = {en} } @misc{ConradGaudetSchenketal., author = {Conrad, Holger and Gaudet, Matthieu and Schenk, Harald and Uhlig, Sebastian}, title = {Micromechanical devices with mechanical actuators}, language = {en} } @misc{StolzMroskKaiseretal., author = {Stolz, Michael and Mrosk, Andreas and Kaiser, Bert and Langa, Sergiu and Ehrig, Lutz and Conrad, Holger and Gaudet, Matthieu and Schenk, Harald}, title = {Optische Charakterisierungsmethoden von siliziumbasierten MEMS mit verdeckten Strukturen}, series = {MikroSystemTechnik-Kongress, Berlin, Germany, 2019}, journal = {MikroSystemTechnik-Kongress, Berlin, Germany, 2019}, publisher = {VDE-Verlag}, pages = {366 -- 369}, abstract = {In der Arbeitsgruppe integrierte Siliziumsysteme des Fraunhofer IPMS werden am Standort Cottbus innovative Anwen-dungen eines neuartigen nanoskopischen elektrostatischen Antriebs (nanoskopic electrostatic drive - NED) untersucht. Eine der vielversprechendsten Anwendungen sind Lautsprecher. Vollst{\"a}ndig aus Silizium gefertigte MEMS-Lautsprecher auf Basis von NED-Biegeaktoren werden vor den akustischen Messungen mechanisch und elektrisch cha-rakterisiert. Beidseitig eingespannte elektrostatisch betriebene in-plane NED-Aktoren werden dabei {\"u}ber einen Fre-quenzbereich von 20 Hz bis 20 kHz angeregt. Dabei sind die Strukturen oft verdeckt, was ihre Charakterisierung er-schwert. Es werden zerst{\"o}rungsfreie optische Methoden pr{\"a}sentiert, mit deren Hilfe die Bestimmung der mechanischen Schwingungseigenschaften einzelner Aktoren erm{\"o}glicht wird sowie die Beweglichkeit im verdeckten Zustand nach-gewiesen werden kann.}, language = {de} } @misc{EhrigKaiserConradetal., author = {Ehrig, Lutz and Kaiser, Bert and Conrad, Holger and Schenk, Hermann and Schuffenhauer, David and Stolz, Michael and Gaudet, Matthieu and Schenk, Harald and Kolkovsky, Vladimir}, title = {MEMS-Loudspeaker - A Novel Class of Electroacoustic Transducers for Mobile Audio Applications}, series = {Tonmeistertagung - VDT International Convention, Cologne, Germany, 2018, Proc. TMT 30}, volume = {TMT 30}, journal = {Tonmeistertagung - VDT International Convention, Cologne, Germany, 2018, Proc. TMT 30}, pages = {189 -- 192}, abstract = {Wireless earphones require a tremendous degree of integration: In addition to the electroacoustic transducer at least the power supply and a radio module have to be accommodated, supplemented by several microphones for hands-free applications or for noise reduction, as well as position and bio sensors, memory and CPU. With increasing integration, the pressure on the individual components increases in terms of size, energy efficiency and costs. In the field of microphones, MEMS technology has enjoyed great popularity for almost 10 years, and due to their benefits (size, cost, integration) MEMS microphones have almost completely supersede other microphone technologies in mobile audio devices and opened up new fields of applications.}, language = {en} } @inproceedings{ConradEhrigKaiseretal., author = {Conrad, Holger and Ehrig, Lutz and Kaiser, Bert and Schenk, Hermann and Schuffenhauer, David and Stolz, Michael and Gaudet, Matthieu and Schenk, Harald}, title = {CMOS-kompatibler MEMS-Lautsprecher f{\"u}r Im-Ohr-Anwendungen}, series = {Tagungsband, DAGA 2018, 44. Deutsche Jahrestagung f{\"u}r Akustik, 19.-22. M{\"a}rz 2018, M{\"u}nchen}, booktitle = {Tagungsband, DAGA 2018, 44. Deutsche Jahrestagung f{\"u}r Akustik, 19.-22. M{\"a}rz 2018, M{\"u}nchen}, publisher = {Deutsche Gesellschaft f{\"u}r Akustik e.V. (DEGA)}, address = {Berlin}, isbn = {978-3-939296-13-3}, pages = {892 -- 894}, language = {de} } @misc{SchenkConradGaudetetal., author = {Schenk, Harald and Conrad, Holger and Gaudet, Matthieu and Schimmanz, Klaus and Langa, Sergiu and Kaiser, Bert}, title = {MEMS-Wandler zum Interagieren mit einem Volumenstrom eines Fluids und Verfahren zum Herstellen desselben}, language = {de} } @misc{ConradKaiserGaudetetal., author = {Conrad, Holger and Kaiser, Bert and Gaudet, Matthieu and Langa, Sergiu and Stolz, Michael and Uhlig, Sebastian and Schimmanz, Klaus and Schenk, Harald}, title = {A novel electrostatic actuator class}, series = {Procedia Engineering}, volume = {168}, journal = {Procedia Engineering}, issn = {1877-7058}, doi = {10.1016/j.proeng.2016.11.454}, pages = {1533 -- 1536}, language = {en} } @inproceedings{ConradGaudetKaiseretal., author = {Conrad, Holger and Gaudet, Matthieu and Kaiser, Bert and Langa, Sergiu and Stolz, Michael and Schenk, Harald}, title = {CMOS-kompatible elektrostatische Biegeaktoren (CMOS-compatible electrostatic actuators}, series = {MikroSystemTechnik Kongress 2017, M{\"u}nchen, Germany, 23.-25. Oktober 2017}, booktitle = {MikroSystemTechnik Kongress 2017, M{\"u}nchen, Germany, 23.-25. Oktober 2017}, publisher = {VDE-Verlag}, address = {Berlin [u.a.]}, isbn = {978-3-8007-4491-6}, pages = {219 -- 222}, language = {en} } @misc{UhligGaudetLangaetal., author = {Uhlig, Sebastian and Gaudet, Matthieu and Langa, Sergiu and Schimmanz, Klaus and Conrad, Holger and Kaiser, Bert and Schenk, Harald}, title = {Electrostatically driven in-plane silicon micropump for modular configuration}, series = {Micromachines}, volume = {9}, journal = {Micromachines}, number = {4}, issn = {2072-666X}, doi = {10.3390/mi9040190}, pages = {15}, abstract = {In this paper, an in-plane reciprocating displacement micropump for liquids and gases which is actuated by a new class of electrostatic bending actuators is reported. The so-called "Nano Electrostatic Drive" is capable of deflecting beyond the electrode gap distance, enabling large generated forces and deflections. Depending on the requirements of the targeted system, the micropump can be modularly designed to meet the specified differential pressures and flow rates by a serial and parallel arrangement of equally working pumping base units. Two selected, medium specific micropump test structure devices for pumping air and isopropanol were designed and investigated. An analytical approach of the driving unit is presented and two-way Fluid-Structure Interaction (FSI) simulations of the micropump were carried out to determine the dynamic behavior. The simulation showed that the test structure device designed for air expected to overcome a total differential pressure of 130 kPa and deliver a flow rate of 0.11 sccm at a 265 Hz driving frequency. The isopropanol design is expected to generate 210 kPa and pump 0.01 sccm at 21 Hz. The device is monolithically fabricated by CMOS-compatible bulk micromachining processes under the use of standard materials only, such as crystalline silicon, silicon dioxide and alumina.}, language = {en} } @inproceedings{SchenkConradGaudetetal., author = {Schenk, Harald and Conrad, Holger and Gaudet, Matthieu and Uhlig, Sebastian and Kaiser, Bert and Langa, Sergiu and Stolz, Michael and Schimmanz, Klaus}, title = {A contribution to the expansion of the applicability of electrostatic forces in micro transducers}, series = {MOEMS and Miniaturized Systems XVI, 30 January-1 February 2017, San Francisco, California, United States}, booktitle = {MOEMS and Miniaturized Systems XVI, 30 January-1 February 2017, San Francisco, California, United States}, publisher = {SPIE}, address = {Bellingham, Washington, USA}, isbn = {978-1-5106-0674-6}, doi = {10.1117/12.2249575}, language = {en} } @misc{BorciaBestehornUhligetal., author = {Borcia, Rodica and Bestehorn, Michael and Uhlig, Sebastian and Gaudet, Matthieu and Schenk, Harald}, title = {Liquid pumping induced by transverse forced vibrations of an elastic beam: A lubrication approach}, series = {Physical Review Fluids}, volume = {3}, journal = {Physical Review Fluids}, number = {8}, issn = {2469-990X}, doi = {10.1103/PhysRevFluids.3.084202}, abstract = {Two liquid pumps are investigated theoretically and numerically: a single thin liquid layer actuated by a periodic force at an elastic beam and a two-layer geometry actuated by an elastic beam. For the second geometry, the beam actuates the liquid from both sides. For both pumps, the liquid film thickness is small compared to the lateral characteristic length of the system. A lubrication theory is developed. The Euler-Bernoulli equation for transverse deformations of an elastic beam is coupled to the fundamental hydrodynamic equations: the Navier-Stokes equation and a continuity equation in the long-wave approximation. In this way, one connects the transverse displacement of the beam with the hydrodynamic quantities (pressure, velocity fields, and flow rates). Appropriate boundary conditions incorporate the function of the valves. The derivation of the theoretical model is followed by numerical simulations. We estimate flow rates (in two and three spatial dimensions) for different system parameters and we compute the efficiency of a well-designed liquid pump.}, language = {en} }