Hahn-Schickard-Gesellschaft für angewandte Forschung e.V.

Jahr	Name
2021	A Non-Linear Lumped Model for the Electro-Mechanical Coupling in Capacitive MEMS Microphones S. Anzinger, C. Bretthauer, D. Tumpold, A. Dehé IEEE Journal of Microelectromechanical Systems, 2021, DOI: 10.1109/JMEMS.2021.3065129, pp. 1 - 9 Kurzfassung einblenden This work provides an analytical non-linear model for the capacitive transduction in MEMS transducers with perforated counter-electrodes, especially applicable to capacitive MEMS microphones. Starting from an electrostatic description of a perforated unit cell of the transducer, analytical formulations of the variable capacitance and electrostatic forces are derived, accounting for the deflection profile of a clamped circular plate. A lumped implementation into conventional circuit simulations tools is enabled via behavioral modeling based on hardware description languages, such as Verilog-A. Therefore, the analytical model is approximated via Taylor series expansions, allowing for a stable and non-linear behavioral implementation. The resulting model finally enables both a small- and large-signal analysis of capacitive MEMS microphones, precisely accounting for non-linearities in the capacitive transduction. This allows to simulate the harmonic distortion of the microphone's output signal and to account for electrostatic spring-softening in simulations of its bias voltage dependent sensitivity. Link to publication
2021	Salivary Biomarkers for Dental Caries Detection and Personalized Monitoring P.N. Paqué, C. Herz, D.B. Wiedemeier, K. Mitsakakis, T. Attin, K. Bao, G.N. Belibasakis, J.P. Hays, J.S. Jenzer, W.E Kaman, M. Karpíšek, P. Körner, J.R. Peham, P.R. Schmidlin, T. Thurnheer, F.J. Wegehaupt, N. Bostanci J. Pers. Med., 2021, 11, 235. DOI: 10.3390/jpm11030235
2021	Validation and verification of predictive salivary biomarkers for oral health N. Bostanci, K. Mitsakakis, B. Afacan, K. Bao, B. Johannsen, D. Baumgartner, L. Müller, H. Kotolová, G. Emingil, M. Karpíšek Scientific Reports, 2021, 11, 6406. DOI: 10.1038/s41598-021-85120-w
2021	Rapid Detection of Pathogens in Wound Exudate via Nucleic Acid Lateral Flow Immunoassay A. Brunauer, R. D. Verboket, D. M. Kainz, F. von Stetten, S. M. Früh Biosensors 11 (3), 74, doi: 10.3390/bios11030074
2019	Automated pre-analytic processing of whole saliva via magnet-beating for point-care protein biomarker analysis B. Johannsen, L. Müller, D. Baumgartner, L. Karkossa, S. M. Früh, N. Bostanci, M. Karpíšek, R. Zengerle, N. Paust, K. Mitsakakis Micromachines, 2019; 10:833. DOI: 10.3390/mi10120833
2021	Fully automated point-of-care differential diagnosis of acute febrile illness S. Hin, B. Lopez-Jimena, M. Bakheit, V. Klein, S. Stack, C. Fall, A. Sall, K. Enan, M. Mustafa, V. Rusu, S. Goethel, N. Paust, R. Zengerle, L. Gillies, S. Frischmann, M. Weidmann, K. Mitsakakis PLoS Negl. Trop. Dis., 2021, 15(2), e0009177. DOI: 10.1371/journal.pntd.0009177
2020	Energy-Harvesting Applications and Efficient Power Processing T. Hehn, A. Bleitner, J. Goeppert, D. Hoffmann, D. Schillinger, D. Sanchez, Y. Manoli in NANO-CHIPS 2030 - On-Chip AI for an Efficient Data-Driven World, ISBN: 978-3-030-18338-7, DOI: 10.1007/978-3-030-18338-7_23, pp. 405 – 442
2020	Analog-to-Information Conversion B. Murmann, M. Verhelst, Y. Manoli in NANO-CHIPS 2030 - On-Chip AI for an Efficient Data-Driven World, ISBN: 978-3-030-18338-7, DOI: 10.1007/978-3-030-18338-7_17, pp. 275 – 292
2020	Low-Power Organic Light Sensor Array Based on Active-Matrix Common-Gate Transimpedance Amplifier on Foil for Imaging Applications S. Elsaegh, C. Veit, U. Zschieschang, M. Amayreh, F. Letzkus, H. Sailer, M. Jurisch, J. Burghartz, U. Wuerfel, H. Klauk, H. Zappe, Y. Manoli IEEE Journal of Solid-State Circuits, vol. 55, no. 9, Print ISSN: 0018-9200, Electronic ISSN: 1558-173X, DOI: 10.1109/JSSC.2020.2993732, pp. 2553 – 2566
2020	Integrated Thermoelectric Sensors Based on Quantum Dot Superlattice for Thermal Management Applications G. Savelli, J.-P. Colonna, M. Keller, P. Coudrain, D. Wendler, J. Goeppert, Y. Manoli, P. Faucherand, A. Royer Journal of Physics D: Applied Physics, vol. 53, no. 44, DOI: 10.1088/1361-6463/aba310
2020	Charge-Based Compact Modeling of Capacitances in Staggered Multi-Finger OTFTs L. Leise, J. Pruefer, G. Darbandy, M. Seifaei, Y. Manoli, H. Klauk, U. Zschieschang, B. Iniguez, A. Kloes IEEE Journal of the Electron Devices Society, vol. 8, Electronic ISSN: 2168-6734, DOI: 10.1109/JEDS.2020.2978400
2021	One-step, wash-free, bead-based immunoassay employing bound-free phase detection B. Johannsen, M. Karpíšek, D. Baumgartner, V. Klein, N.Bostanci, N. Paust, S. M. Früh, R. Zengerle, K. Mitsakakis Anal. Chim. Acta, 2021;1153:338280. DOI: 10.1016/j.aca.2021.338280
2021	Scalable fabrication of renal spheroids and nephron-like tubules bybioprinting and controlled self-assembly of epithelial cells K. Tröndle, L. Rizzo, R. Pichler, F. Koch, A. Itani, R. Zengerle, S. S. Lienkamp, P. Koltay, S. Zimmermann Biofabrication …., doi: 10.1088/1758-5090/abe185
2021	Point-of-Care System for HTLV-1 Proviral Load Quantification by Digital Mediator Displacement LAMP L. Becherer, J. F. Hess, S. Frischmann, M. Bakheit, H. Nitschko, S. Stinco, F. Zitz, H. Hofer, G. Porro, F. Hausladen, K. Stock, D. Drossart, H. Wurm, H. Kuhn, D. Huber, T. Hutzenlaub, N. Paust, M. Keller, O. Strohmeier, S. Wadle, N. Borst, R. Zengerle, F. von Stetten Micromachines 12 (2), 159, doi: 10.3390/mi12020159
	Practical aspects and limitations of hermeticity testing of micro-encapsulations using cumulative helium leak detection for miniaturized implantable medical devices ISSN: 2156-3985, Seite – bis Seite: 351 - 359, 2020 Kurzfassung einblenden Hermeticity of an electronic package defines its effectiveness to seal and protect the encapsulated electronics from the ingress of contaminants, gases and moisture, as well as helping avoid toxic materials from inside the capsule contacting tissue. Using accelerated testing by methods of leak detection analysis, the theoretical limit of the lifetime due to water ingress of an encapsulated device can be estimated. However, classical methods are not sufficient for micro-encapsulations and exhibit limitations due to the resolution of the detection mechanisms required for such small cavities. With the availability of cumulative helium leak detection (CHLD) the detection limits can be extended by several magnitudes of resolution. However, limitations due to the physics of leakage apply. This paper discusses the limitations concerning the ability for combined gross, and fine leak testing in combination with outgassing effects using CHLD for miniaturized implantable medical devices. Practical aspects are evaluated regarding the applicability of CHLD for such micro encapsulations at the example of an AuSn sealed alumina package. Link to publication
2020	Practical aspects and limitations of hermeticity testing of micro-encapsulations using cumulative helium leak detection for miniaturized implantable medical devices T. Guenther, A. Schwenck, P. Matteucci, R. Leigh, M. Svehla, A. Zimmermann, G.J. Suaning ISSN: 2156-3985, Seite – bis Seite: 351 - 359, 2020 Kurzfassung einblenden Hermeticity of an electronic package defines its effectiveness to seal and protect the encapsulated electronics from the ingress of contaminants, gases and moisture, as well as helping avoid toxic materials from inside the capsule contacting tissue. Using accelerated testing by methods of leak detection analysis, the theoretical limit of the lifetime due to water ingress of an encapsulated device can be estimated. However, classical methods are not sufficient for micro-encapsulations and exhibit limitations due to the resolution of the detection mechanisms required for such small cavities. With the availability of cumulative helium leak detection (CHLD) the detection limits can be extended by several magnitudes of resolution. However, limitations due to the physics of leakage apply. This paper discusses the limitations concerning the ability for combined gross, and fine leak testing in combination with outgassing effects using CHLD for miniaturized implantable medical devices. Practical aspects are evaluated regarding the applicability of CHLD for such micro encapsulations at the example of an AuSn sealed alumina package. Link to publication
2020	Surface Optimization of Micro-Integrated ReflectiveOptical Elements by Thermoset Injection Molding T. Guenther, L. Diegel, M. Roeder, M. Drexler, M. Haybat, P. Wappler, M. Soltani, A. Zimmermann 2076-3417, 1-13, 2020 Kurzfassung einblenden Thermoset materials offer a multitude of advantageous properties in terms of shrinkage and warpage as well as mechanical, thermal and chemical stability compared to thermoplastic materials. Thanks to these properties, thermosets are commonly used to encapsulate electronic components on a 2nd-level packaging prior to assembly by reflow soldering on printed circuits boards or other substrates. Based on the characteristics of thermosets to develop a distinct skin effect due to segregation during the molding process, the surface properties of injection molded thermoset components resemble optical characteristics. Within this study, molding parameters for thermoset components are analyzed in order to optimize the surface quality of injection molded thermoset components. Perspectively, in combination with a reflective coating by e.g., physical vapor deposition, such elements with micro-integrated reflective optical features can be used as optoelectronic components, which can be processed at medium-ranged temperatures up to 230 °C. The obtained results indicate the general feasibility since Ra values of 60 nm and below can be achieved. The main influencing parameters on surface quality were identified as the composition of filler materials and tool temperature. Link to publication
2020	Parametric amplification of broadband vibrational energy harvesters for energy-autonomous sensors enabled by field-induced striction U Nabholz, L Lamprecht, J Mehner, A Zimmermann, Mechanical Systems and Signal Processing 139, 106642, 2020
2020	Temperature Dependence of the Steering Angles of a Silicon Photonic Optical Phased Array PAK Yepez, U Scholz, A Zimmermann IEEE Photonics Journal 12 (2), 1-13, 2020
2020	CMOS-compatible measures for thermal management of phase-sensitive silicon photonic systems PA Krochin-Yepez, U Scholz, A Zimmermann Photonics 7 (1), 6, 2020

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Wissenschaftliche Publikationen

Forschung bedeutet bei Hahn-Schickard auch, die Ergebnisse in wissenschaftlichen Publikationen zu veröffentlichen.

A Non-Linear Lumped Model for the Electro-Mechanical Coupling in Capacitive MEMS Microphones

Salivary Biomarkers for Dental Caries Detection and Personalized Monitoring

Validation and verification of predictive salivary biomarkers for oral health

Rapid Detection of Pathogens in Wound Exudate via Nucleic Acid Lateral Flow Immunoassay

Automated pre-analytic processing of whole saliva via magnet-beating for point-care protein biomarker analysis

Fully automated point-of-care differential diagnosis of acute febrile illness

Energy-Harvesting Applications and Efficient Power Processing

Analog-to-Information Conversion

Low-Power Organic Light Sensor Array Based on Active-Matrix Common-Gate Transimpedance Amplifier on Foil for Imaging Applications

Integrated Thermoelectric Sensors Based on Quantum Dot Superlattice for Thermal Management Applications

Charge-Based Compact Modeling of Capacitances in Staggered Multi-Finger OTFTs

One-step, wash-free, bead-based immunoassay employing bound-free phase detection

Scalable fabrication of renal spheroids and nephron-like tubules bybioprinting and controlled self-assembly of epithelial cells

Point-of-Care System for HTLV-1 Proviral Load Quantification by Digital Mediator Displacement LAMP

Practical aspects and limitations of hermeticity testing of micro-encapsulations using cumulative helium leak detection for miniaturized implantable medical devices

Practical aspects and limitations of hermeticity testing of micro-encapsulations using cumulative helium leak detection for miniaturized implantable medical devices

Surface Optimization of Micro-Integrated ReflectiveOptical Elements by Thermoset Injection Molding

Parametric amplification of broadband vibrational energy harvesters for energy-autonomous sensors enabled by field-induced striction

Temperature Dependence of the Steering Angles of a Silicon Photonic Optical Phased Array

CMOS-compatible measures for thermal management of phase-sensitive silicon photonic systems