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Wissenschaftliche Publikationen

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

Jahr Name
2021

CMOS-integrierter Chip zur telemetrischen Erfassung von Materialverformungen (StrainSens)

T. Hehn

Abschlussbericht IGF-Vorhaben Nr. 19897 N

Kurzfassung einblenden

Angestrebte Ziele:

  • Charakterisierung und Analyse des Silizium-Elements ohne Einfluss der AVT
  • Mechanische Ankopplung der Sensorchips an Werkstücke und Ermittlung der
  • Sensorwerte bei unterschiedlicher Last und unter variablen Umgebungsbedingungen
  • Modellierung und Simulation der an die Werkstücke gekoppelten Sensorchips und
  • Verifizierung der Modelle durch Vergleich mit den Messdaten

Link zum Bericht

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