---
_id: '54966'
abstract:
- lang: eng
text: Piezoresponse force microscopy (PFM) is one of the most widespread methods
for investigating and visualizing ferroelectric domain structures down to the
nanometer length scale. PFM makes use of the direct coupling of the piezoelectric
response to the crystal lattice, and hence, it is most often applied to spatially
map the three-dimensional (3D) near-surface domain distribution of any polar or
ferroic sample. Nonetheless, since most samples investigated by PFM are at least
semiconducting or fully insulating, the electric ac field emerging from the conductive
scanning force microscopy (SFM) tip penetrates the sample and, hence, may also
couple to polar features that are deeply buried into the bulk of the sample under
investigation. Thus, in the work presented here, we experimentally and theoretically
explore the contrast and depth resolution capabilities of PFM, by analyzing the
dependence of several key parameters. These key parameters include the depth of
the buried feature, i.e., here a domain wall (DW), as well as PFM-relevant technical
parameters such as the tip radius, the PFM drive voltage and frequency, and the
signal-to-noise ratio. The theoretical predictions are experimentally verified
using x-cut periodically poled lithium niobate single crystals that are specially
prepared into wedge-shaped samples, in order to allow the buried feature, here
the DW, to be “positioned” at any depth into the bulk. This inspection essentially
contributes to the fundamental understanding in PFM contrast analysis and to the
reconstruction of 3D domain structures down to a 1 μm-penetration depth into the
sample.
article_type: original
author:
- first_name: Matthias
full_name: Roeper, Matthias
last_name: Roeper
- first_name: Samuel D.
full_name: Seddon, Samuel D.
last_name: Seddon
- first_name: Zeeshan H.
full_name: Amber, Zeeshan H.
last_name: Amber
- first_name: Michael
full_name: Rüsing, Michael
id: '22501'
last_name: Rüsing
orcid: 0000-0003-4682-4577
- first_name: Lukas M.
full_name: Eng, Lukas M.
last_name: Eng
citation:
ama: Roeper M, Seddon SD, Amber ZH, Rüsing M, Eng LM. Depth resolution in piezoresponse
force microscopy. Journal of Applied Physics. 2024;135(22). doi:10.1063/5.0206784
apa: Roeper, M., Seddon, S. D., Amber, Z. H., Rüsing, M., & Eng, L. M. (2024).
Depth resolution in piezoresponse force microscopy. Journal of Applied Physics,
135(22). https://doi.org/10.1063/5.0206784
bibtex: '@article{Roeper_Seddon_Amber_Rüsing_Eng_2024, title={Depth resolution in
piezoresponse force microscopy}, volume={135}, DOI={10.1063/5.0206784},
number={22}, journal={Journal of Applied Physics}, publisher={AIP Publishing},
author={Roeper, Matthias and Seddon, Samuel D. and Amber, Zeeshan H. and Rüsing,
Michael and Eng, Lukas M.}, year={2024} }'
chicago: Roeper, Matthias, Samuel D. Seddon, Zeeshan H. Amber, Michael Rüsing, and
Lukas M. Eng. “Depth Resolution in Piezoresponse Force Microscopy.” Journal
of Applied Physics 135, no. 22 (2024). https://doi.org/10.1063/5.0206784.
ieee: 'M. Roeper, S. D. Seddon, Z. H. Amber, M. Rüsing, and L. M. Eng, “Depth resolution
in piezoresponse force microscopy,” Journal of Applied Physics, vol. 135,
no. 22, 2024, doi: 10.1063/5.0206784.'
mla: Roeper, Matthias, et al. “Depth Resolution in Piezoresponse Force Microscopy.”
Journal of Applied Physics, vol. 135, no. 22, AIP Publishing, 2024, doi:10.1063/5.0206784.
short: M. Roeper, S.D. Seddon, Z.H. Amber, M. Rüsing, L.M. Eng, Journal of Applied
Physics 135 (2024).
date_created: 2024-07-01T21:00:43Z
date_updated: 2025-04-03T12:35:34Z
department:
- _id: '15'
- _id: '169'
- _id: '288'
- _id: '623'
doi: 10.1063/5.0206784
intvolume: ' 135'
issue: '22'
keyword:
- Ferroelectrics
- lithium niobate
- piezoresponse force microscopy
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1063/5.0206784
oa: '1'
publication: Journal of Applied Physics
publication_identifier:
issn:
- 0021-8979
- 1089-7550
publication_status: published
publisher: AIP Publishing
quality_controlled: '1'
status: public
title: Depth resolution in piezoresponse force microscopy
type: journal_article
user_id: '22501'
volume: 135
year: '2024'
...
---
_id: '43441'
abstract:
- lang: eng
text: "This paper reveals the 3D character of the intermetallic layer at the aluminum–steel
interface which pops\r\nup above the original sample surface during annealing.
Popping out of the intermetallics was proven using\r\natomic force microscopy.
The phase expands out of the plane due to the exothermic formation of the Al5Fe2\r\nphase
and the feasibility of surface diffusion. Milling by a focused ion beam enabled
the comparison of the\r\nchemical composition of the surface layer with the bulk
interface, showing no difference. The growth direction\r\nis both towards aluminum
and steel — the main diffusion flux is from aluminum towards steel, and the new\r\nintermetallic
phase emerges at the steel side. The shortage of Al atoms causes a shift of the
intermetallic as a\r\nwhole towards aluminum."
article_number: '112043'
article_type: original
author:
- first_name: Michaela
full_name: Šlapáková, Michaela
last_name: Šlapáková
- first_name: Barbora
full_name: Kihoulou, Barbora
last_name: Kihoulou
- first_name: Jozef
full_name: Veselý, Jozef
last_name: Veselý
- first_name: Peter
full_name: Minárik, Peter
last_name: Minárik
- first_name: Klaudia
full_name: Fekete, Klaudia
last_name: Fekete
- first_name: Michal
full_name: Knapek, Michal
last_name: Knapek
- first_name: Rostislav
full_name: Králík, Rostislav
last_name: Králík
- first_name: Olexandr
full_name: Grydin, Olexandr
id: '43822'
last_name: Grydin
- first_name: Mykhailo
full_name: Stolbchenko, Mykhailo
last_name: Stolbchenko
- first_name: Mirko
full_name: Schaper, Mirko
id: '43720'
last_name: Schaper
citation:
ama: Šlapáková M, Kihoulou B, Veselý J, et al. 3D-structure of intermetallic interface
layer in Al–steel clad material. Vacuum. 2023;212. doi:10.1016/j.vacuum.2023.112043
apa: Šlapáková, M., Kihoulou, B., Veselý, J., Minárik, P., Fekete, K., Knapek, M.,
Králík, R., Grydin, O., Stolbchenko, M., & Schaper, M. (2023). 3D-structure
of intermetallic interface layer in Al–steel clad material. Vacuum, 212,
Article 112043. https://doi.org/10.1016/j.vacuum.2023.112043
bibtex: '@article{Šlapáková_Kihoulou_Veselý_Minárik_Fekete_Knapek_Králík_Grydin_Stolbchenko_Schaper_2023,
title={3D-structure of intermetallic interface layer in Al–steel clad material},
volume={212}, DOI={10.1016/j.vacuum.2023.112043},
number={112043}, journal={Vacuum}, publisher={Elsevier BV}, author={Šlapáková,
Michaela and Kihoulou, Barbora and Veselý, Jozef and Minárik, Peter and Fekete,
Klaudia and Knapek, Michal and Králík, Rostislav and Grydin, Olexandr and Stolbchenko,
Mykhailo and Schaper, Mirko}, year={2023} }'
chicago: Šlapáková, Michaela, Barbora Kihoulou, Jozef Veselý, Peter Minárik, Klaudia
Fekete, Michal Knapek, Rostislav Králík, Olexandr Grydin, Mykhailo Stolbchenko,
and Mirko Schaper. “3D-Structure of Intermetallic Interface Layer in Al–Steel
Clad Material.” Vacuum 212 (2023). https://doi.org/10.1016/j.vacuum.2023.112043.
ieee: 'M. Šlapáková et al., “3D-structure of intermetallic interface layer
in Al–steel clad material,” Vacuum, vol. 212, Art. no. 112043, 2023, doi:
10.1016/j.vacuum.2023.112043.'
mla: Šlapáková, Michaela, et al. “3D-Structure of Intermetallic Interface Layer
in Al–Steel Clad Material.” Vacuum, vol. 212, 112043, Elsevier BV, 2023,
doi:10.1016/j.vacuum.2023.112043.
short: M. Šlapáková, B. Kihoulou, J. Veselý, P. Minárik, K. Fekete, M. Knapek, R.
Králík, O. Grydin, M. Stolbchenko, M. Schaper, Vacuum 212 (2023).
date_created: 2023-04-08T17:24:40Z
date_updated: 2023-06-01T14:22:15Z
department:
- _id: '158'
doi: 10.1016/j.vacuum.2023.112043
intvolume: ' 212'
keyword:
- Al-steel clad
- twin-roll casting
- 3D characterization
- atomic force microscopy
- diffusion direction
- surface growth
language:
- iso: eng
publication: Vacuum
publication_identifier:
issn:
- 0042-207X
publication_status: published
publisher: Elsevier BV
quality_controlled: '1'
status: public
title: 3D-structure of intermetallic interface layer in Al–steel clad material
type: journal_article
user_id: '43720'
volume: 212
year: '2023'
...
---
_id: '34707'
abstract:
- lang: eng
text: Of the many outstanding female philosophers of the European Enlightenment,
Emilie Du Châtelet excelled as a physicist, a philosopher, and a mathematician,
as well as a Bible critic. She was famous in her lifetime and was not completely
forgotten thereafter. Among her admirers, correspondents and friends were the
most acknowledged scholars of her time, including Voltaire, Clairault, Maupertuis,
Diderot, Helvetius, La Mettrie, Buffon, Christian Wolff, Leonard Euler, and Johann
II Bernoulli. Her philosophical work enjoyed high reputation and her opus magnum,
the Institutions physiques, was translated into Italian and German and proved
her to be an intellectual of European stature. Its defense of living forces and
its implied forecast into dynamics as well as her methodological grounding of
scientific knowledge as hypothetical, impacted philosophy and science. Reality
must by nature escape us. What we perceive are phenomena. Du Châtelet explains
the function of space and time to trace us back to the origin of phenomena. Her
influence on Kant is evident. Next to her writings in physics, mathematics, philosophy,
language, and logic, she contributed to morality and ethics. Du Châtelet left
an opus of quite systematic breadth. This impressive publishing activity excels
in the amount of its scientific and philosophical production to which a vast collection
of manuscripts must be added.She argued against prejudice and idolatry in philosophy
and science. Science is a cooperative undertaking over history and beyond nations.
Her moral writings align with ideas of the French materialists. Du Châtelet translated
and commented on Newton’s Principia, preparing thus the fertile soil of the generation
of physicists to come in France.
author:
- first_name: Ruth
full_name: Hagengruber, Ruth
id: '198'
last_name: Hagengruber
orcid: https://orcid.org/0000-0003-3360-6335
citation:
ama: 'Hagengruber R. Du Châtelet, Émilie (1706–1749). In: Encyclopedia of Early
Modern Philosophy and the Sciences. Springer International Publishing; 2021.
doi:10.1007/978-3-319-20791-9_410-1'
apa: Hagengruber, R. (2021). Du Châtelet, Émilie (1706–1749). In Encyclopedia
of Early Modern Philosophy and the Sciences. Springer International Publishing.
https://doi.org/10.1007/978-3-319-20791-9_410-1
bibtex: '@inbook{Hagengruber_2021, place={Cham}, title={Du Châtelet, Émilie (1706–1749)},
DOI={10.1007/978-3-319-20791-9_410-1},
booktitle={Encyclopedia of Early Modern Philosophy and the Sciences}, publisher={Springer
International Publishing}, author={Hagengruber, Ruth}, year={2021} }'
chicago: 'Hagengruber, Ruth. “Du Châtelet, Émilie (1706–1749).” In Encyclopedia
of Early Modern Philosophy and the Sciences. Cham: Springer International
Publishing, 2021. https://doi.org/10.1007/978-3-319-20791-9_410-1.'
ieee: 'R. Hagengruber, “Du Châtelet, Émilie (1706–1749),” in Encyclopedia of
Early Modern Philosophy and the Sciences, Cham: Springer International Publishing,
2021.'
mla: Hagengruber, Ruth. “Du Châtelet, Émilie (1706–1749).” Encyclopedia of Early
Modern Philosophy and the Sciences, Springer International Publishing, 2021,
doi:10.1007/978-3-319-20791-9_410-1.
short: 'R. Hagengruber, in: Encyclopedia of Early Modern Philosophy and the Sciences,
Springer International Publishing, Cham, 2021.'
date_created: 2022-12-21T11:54:55Z
date_updated: 2023-01-12T10:06:49Z
department:
- _id: '615'
- _id: '14'
- _id: '519'
doi: 10.1007/978-3-319-20791-9_410-1
keyword:
- aura Bassi Luise Gottsched Immanuel Kant Dourtous de Mairan Johann II Bernoulli
Algarotti Buffon d’Alembert La Mettrie Principle of contradiction Hypotheses Enlightenment
Leibniz-Clarke Correspondence Living forces Dead forces
- happiness Space Imaginary beings Monads Epicurus Ethics Women philosophers Newton’s
laws Principia Motion inertia Active force Vis viva Vis mortua Hypothetic reasoning
Hypotheses
- a priori principles
- Experience
- Dead forces
- Living forces
- Energy Dynamics
language:
- iso: eng
place: Cham
publication: Encyclopedia of Early Modern Philosophy and the Sciences
publication_identifier:
isbn:
- '9783319207919'
- '9783319207919'
publication_status: published
publisher: Springer International Publishing
status: public
title: Du Châtelet, Émilie (1706–1749)
type: book_chapter
user_id: '14931'
year: '2021'
...
---
_id: '1452'
abstract:
- lang: eng
text: Opinion leaders of an investment network can have a significant impact on
capital mar-kets because their investment decisions are adopted by their peers
and trigger large trad-ing cascades, increasing herding behavior and comovement
among stock returns. This paper analyzes the interaction-based relations of traders
from a large social trading plat-form and identifies the driving forces and the
opinion leaders within a large online trading network as the nodes with the highest
centrality and the highest force of infection, respec-tively. Relying on recent
insights from epidemiological research, I maintain that central-ity identifies
the most central traders in the network, while the expected force quantifies the
most influential traders and their spreading power. I study the behavior and charac-teristics
that set central and influential traders apart from other traders. The ability
to identify focal points and their trading behavior within a trading network is
important for investors, investment advisers, and policy makers.
article_type: original
author:
- first_name: Matthias
full_name: Pelster, Matthias
id: '67265'
last_name: Pelster
orcid: ' https://orcid.org/0000-0001-5740-2420'
citation:
ama: 'Pelster M. I’ll Have What S/he’s Having: A Case Study of a Social Trading
Network. Proceedings of the International Conference on Information Systems.
2017.'
apa: 'Pelster, M. (2017). I’ll Have What S/he’s Having: A Case Study of a Social
Trading Network. Proceedings of the International Conference on Information
Systems.'
bibtex: '@article{Pelster_2017, title={I’ll Have What S/he’s Having: A Case Study
of a Social Trading Network}, journal={Proceedings of the International Conference
on Information Systems}, author={Pelster, Matthias}, year={2017} }'
chicago: 'Pelster, Matthias. “I’ll Have What S/He’s Having: A Case Study of a Social
Trading Network.” Proceedings of the International Conference on Information
Systems, 2017.'
ieee: 'M. Pelster, “I’ll Have What S/he’s Having: A Case Study of a Social Trading
Network,” Proceedings of the International Conference on Information Systems,
2017.'
mla: 'Pelster, Matthias. “I’ll Have What S/He’s Having: A Case Study of a Social
Trading Network.” Proceedings of the International Conference on Information
Systems, 2017.'
short: M. Pelster, Proceedings of the International Conference on Information Systems
(2017).
date_created: 2018-03-20T11:34:47Z
date_updated: 2022-01-06T06:52:00Z
department:
- _id: '186'
- _id: '578'
keyword:
- Online trading
- investment advice
- network modeling
- Expected Force
- herding.
language:
- iso: eng
publication: Proceedings of the International Conference on Information Systems
publication_status: published
status: public
title: 'I’ll Have What S/he’s Having: A Case Study of a Social Trading Network'
type: journal_article
urn: '14524'
user_id: '67265'
year: '2017'
...
---
_id: '13241'
abstract:
- lang: eng
text: The accuracy of water models derived from ab initio molecular dynamics simulations
by means on an improved force-matching scheme is assessed for various thermodynamic,
transport, and structural properties. It is found that although the resulting
force-matched water models are typically less accurate than fully empirical force
fields in predicting thermodynamic properties, they are nevertheless much more
accurate than generally appreciated in reproducing the structure of liquid water
and in fact superseding most of the commonly used empirical water models. This
development demonstrates the feasibility to routinely parametrize computationally
efficient yet predictive potential energy functions based on accurate ab initio
molecular dynamics simulations for a large variety of different systems. © 2016
Wiley Periodicals, Inc.
author:
- first_name: Andreas
full_name: Köster, Andreas
last_name: Köster
- first_name: Thomas
full_name: Spura, Thomas
last_name: Spura
- first_name: Gábor
full_name: Rutkai, Gábor
last_name: Rutkai
- first_name: Jan
full_name: Kessler, Jan
last_name: Kessler
- first_name: Hendrik
full_name: Wiebeler, Hendrik
last_name: Wiebeler
- first_name: Jadran
full_name: Vrabec, Jadran
last_name: Vrabec
- first_name: Thomas D.
full_name: Kühne, Thomas D.
last_name: Kühne
citation:
ama: Köster A, Spura T, Rutkai G, et al. Assessing the accuracy of improved force-matched
water models derived from Ab initio molecular dynamics simulations. Journal
of Computational Chemistry. 2016;37(19):1828-1838. doi:10.1002/jcc.24398
apa: Köster, A., Spura, T., Rutkai, G., Kessler, J., Wiebeler, H., Vrabec, J., &
Kühne, T. D. (2016). Assessing the accuracy of improved force-matched water models
derived from Ab initio molecular dynamics simulations. Journal of Computational
Chemistry, 37(19), 1828–1838. https://doi.org/10.1002/jcc.24398
bibtex: '@article{Köster_Spura_Rutkai_Kessler_Wiebeler_Vrabec_Kühne_2016, title={Assessing
the accuracy of improved force-matched water models derived from Ab initio molecular
dynamics simulations}, volume={37}, DOI={10.1002/jcc.24398},
number={19}, journal={Journal of Computational Chemistry}, author={Köster, Andreas
and Spura, Thomas and Rutkai, Gábor and Kessler, Jan and Wiebeler, Hendrik and
Vrabec, Jadran and Kühne, Thomas D.}, year={2016}, pages={1828–1838} }'
chicago: 'Köster, Andreas, Thomas Spura, Gábor Rutkai, Jan Kessler, Hendrik Wiebeler,
Jadran Vrabec, and Thomas D. Kühne. “Assessing the Accuracy of Improved Force-Matched
Water Models Derived from Ab Initio Molecular Dynamics Simulations.” Journal
of Computational Chemistry 37, no. 19 (2016): 1828–38. https://doi.org/10.1002/jcc.24398.'
ieee: A. Köster et al., “Assessing the accuracy of improved force-matched
water models derived from Ab initio molecular dynamics simulations,” Journal
of Computational Chemistry, vol. 37, no. 19, pp. 1828–1838, 2016.
mla: Köster, Andreas, et al. “Assessing the Accuracy of Improved Force-Matched Water
Models Derived from Ab Initio Molecular Dynamics Simulations.” Journal of Computational
Chemistry, vol. 37, no. 19, 2016, pp. 1828–38, doi:10.1002/jcc.24398.
short: A. Köster, T. Spura, G. Rutkai, J. Kessler, H. Wiebeler, J. Vrabec, T.D.
Kühne, Journal of Computational Chemistry 37 (2016) 1828–1838.
date_created: 2019-09-16T12:53:28Z
date_updated: 2022-01-06T06:51:31Z
department:
- _id: '304'
doi: 10.1002/jcc.24398
intvolume: ' 37'
issue: '19'
keyword:
- liquid water
- force matching
- ab initio
- molecular dynamics
- Monte Carlo
language:
- iso: eng
page: 1828-1838
project:
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
publication: Journal of Computational Chemistry
publication_status: published
status: public
title: Assessing the accuracy of improved force-matched water models derived from
Ab initio molecular dynamics simulations
type: journal_article
user_id: '71692'
volume: 37
year: '2016'
...
---
_id: '9868'
abstract:
- lang: eng
text: In order to increase mechanical strength, heat dissipation and ampacity and
to decrease failure through fatigue fracture, wedge copper wire bonding is being
introduced as a standard interconnection method for mass production. To achieve
the same process stability when using copper wire instead of aluminum wire a profound
understanding of the bonding process is needed. Due to the higher hardness of
copper compared to aluminum wire it is more difficult to approach the surfaces
of wire and substrate to a level where van der Waals forces are able to arise
between atoms. Also, enough friction energy referred to the total contact area
has to be generated to activate the surfaces. Therefore, a friction model is used
to simulate the joining process. This model calculates the resulting energy of
partial areas in the contact surface and provides information about the adhesion
process of each area. The focus here is on the arising of micro joints in the
contact area depending on the location in the contact and time. To validate the
model, different touchdown forces are used to vary the initial contact areas of
wire and substrate. Additionally, a piezoelectric tri-axial force sensor is built
up to identify the known phases of pre-deforming, cleaning, adhering and diffusing
for the real bonding process to map with the model. Test substrates as DBC and
copper plate are used to show the different formations of a wedge bond connection
due to hardness and reaction propensity. The experiments were done by using 500
$\mu$m copper wire and a standard V-groove tool.
author:
- first_name: Simon
full_name: Althoff, Simon
last_name: Althoff
- first_name: Jan
full_name: Neuhaus, Jan
last_name: Neuhaus
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: 'Althoff S, Neuhaus J, Hemsel T, Sextro W. Improving the bond quality of copper
wire bonds using a friction model approach. In: Electronic Components and Technology
Conference (ECTC), 2014 IEEE 64th. ; 2014:1549-1555. doi:10.1109/ECTC.2014.6897500'
apa: Althoff, S., Neuhaus, J., Hemsel, T., & Sextro, W. (2014). Improving the
bond quality of copper wire bonds using a friction model approach. In Electronic
Components and Technology Conference (ECTC), 2014 IEEE 64th (pp. 1549–1555).
https://doi.org/10.1109/ECTC.2014.6897500
bibtex: '@inproceedings{Althoff_Neuhaus_Hemsel_Sextro_2014, title={Improving the
bond quality of copper wire bonds using a friction model approach}, DOI={10.1109/ECTC.2014.6897500},
booktitle={Electronic Components and Technology Conference (ECTC), 2014 IEEE 64th},
author={Althoff, Simon and Neuhaus, Jan and Hemsel, Tobias and Sextro, Walter},
year={2014}, pages={1549–1555} }'
chicago: Althoff, Simon, Jan Neuhaus, Tobias Hemsel, and Walter Sextro. “Improving
the Bond Quality of Copper Wire Bonds Using a Friction Model Approach.” In Electronic
Components and Technology Conference (ECTC), 2014 IEEE 64th, 1549–55, 2014.
https://doi.org/10.1109/ECTC.2014.6897500.
ieee: S. Althoff, J. Neuhaus, T. Hemsel, and W. Sextro, “Improving the bond quality
of copper wire bonds using a friction model approach,” in Electronic Components
and Technology Conference (ECTC), 2014 IEEE 64th, 2014, pp. 1549–1555.
mla: Althoff, Simon, et al. “Improving the Bond Quality of Copper Wire Bonds Using
a Friction Model Approach.” Electronic Components and Technology Conference
(ECTC), 2014 IEEE 64th, 2014, pp. 1549–55, doi:10.1109/ECTC.2014.6897500.
short: 'S. Althoff, J. Neuhaus, T. Hemsel, W. Sextro, in: Electronic Components
and Technology Conference (ECTC), 2014 IEEE 64th, 2014, pp. 1549–1555.'
date_created: 2019-05-20T12:11:44Z
date_updated: 2019-09-16T10:57:58Z
department:
- _id: '151'
doi: 10.1109/ECTC.2014.6897500
keyword:
- adhesion
- circuit reliability
- deformation
- diffusion
- fatigue cracks
- friction
- interconnections
- lead bonding
- van der Waals forces
- Cu
- adhering process
- adhesion process
- ampacity improvement
- bond quality improvement
- cleaning process
- diffusing process
- fatigue fracture failure
- friction energy
- friction model
- heat dissipation
- mechanical strength
- piezoelectric triaxial force sensor
- predeforming process
- size 500 mum
- total contact area
- van der Waals forces
- wedge copper wire bonding
- Bonding
- Copper
- Finite element analysis
- Force
- Friction
- Substrates
- Wires
language:
- iso: eng
page: 1549-1555
publication: Electronic Components and Technology Conference (ECTC), 2014 IEEE 64th
quality_controlled: '1'
status: public
title: Improving the bond quality of copper wire bonds using a friction model approach
type: conference
user_id: '55222'
year: '2014'
...
---
_id: '9568'
abstract:
- lang: eng
text: A simple pre-stress estimate method of Langevin transducers is studied. The
measurement setup consists of a capacitor, an impedance converter and a voltmeter.
Based on the piezoelectric equation and the basic circuit theory, the mathematical
expression between the pre-stress and the voltage across the capacitor is derived.
The pre-stress level can then be calculated out of the measurement of the capacitor
voltage. In order to evaluate the precision of this method, a force washer is
used to measure the pre-stress of the Langevin transducer. The result shows the
pre-stress level obtained from this method is 30-40\% higher than the pre-stress
level measured by the force washer. This method is simple and can be used to estimate
the pre-stress of various Langevin transducers. The precision of this method can
be raised if d33 is identified under different pre-stress levels.
author:
- first_name: Fu
full_name: Bo, Fu
last_name: Bo
- first_name: Li
full_name: Ting, Li
last_name: Ting
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
citation:
ama: 'Bo F, Ting L, Hemsel T. A simple pre-stress estimating method of langevin
transducers. In: Piezoelectricity, Acoustic Waves, and Device Applications,
2008. SPAWDA 2008. Symposium On. ; 2008:324-327. doi:10.1109/SPAWDA.2008.4775801'
apa: Bo, F., Ting, L., & Hemsel, T. (2008). A simple pre-stress estimating method
of langevin transducers. In Piezoelectricity, Acoustic Waves, and Device Applications,
2008. SPAWDA 2008. Symposium on (pp. 324–327). https://doi.org/10.1109/SPAWDA.2008.4775801
bibtex: '@inproceedings{Bo_Ting_Hemsel_2008, title={A simple pre-stress estimating
method of langevin transducers}, DOI={10.1109/SPAWDA.2008.4775801},
booktitle={Piezoelectricity, Acoustic Waves, and Device Applications, 2008. SPAWDA
2008. Symposium on}, author={Bo, Fu and Ting, Li and Hemsel, Tobias}, year={2008},
pages={324–327} }'
chicago: Bo, Fu, Li Ting, and Tobias Hemsel. “A Simple Pre-Stress Estimating Method
of Langevin Transducers.” In Piezoelectricity, Acoustic Waves, and Device Applications,
2008. SPAWDA 2008. Symposium On, 324–27, 2008. https://doi.org/10.1109/SPAWDA.2008.4775801.
ieee: F. Bo, L. Ting, and T. Hemsel, “A simple pre-stress estimating method of langevin
transducers,” in Piezoelectricity, Acoustic Waves, and Device Applications,
2008. SPAWDA 2008. Symposium on, 2008, pp. 324–327.
mla: Bo, Fu, et al. “A Simple Pre-Stress Estimating Method of Langevin Transducers.”
Piezoelectricity, Acoustic Waves, and Device Applications, 2008. SPAWDA 2008.
Symposium On, 2008, pp. 324–27, doi:10.1109/SPAWDA.2008.4775801.
short: 'F. Bo, L. Ting, T. Hemsel, in: Piezoelectricity, Acoustic Waves, and Device
Applications, 2008. SPAWDA 2008. Symposium On, 2008, pp. 324–327.'
date_created: 2019-04-29T11:16:13Z
date_updated: 2022-01-06T07:04:16Z
department:
- _id: '151'
doi: 10.1109/SPAWDA.2008.4775801
keyword:
- capacitors
- impedance convertors
- piezoelectric transducers
- stress analysis
- Langevin transducers
- basic circuit theory
- capacitor
- impedance converter
- piezoelectric equation
- pre-stress estimating method
- voltmeter
- Capacitors
- Educational institutions
- Equations
- Force measurement
- Impedance measurement
- Manufacturing
- Mechatronics
- Piezoelectric transducers
- Voltage
- Voltmeters
- Langevin transducer
- capacitor
- piezoelectric element
- pre-stress
language:
- iso: eng
page: 324-327
publication: Piezoelectricity, Acoustic Waves, and Device Applications, 2008. SPAWDA
2008. Symposium on
status: public
title: A simple pre-stress estimating method of langevin transducers
type: conference
user_id: '55222'
year: '2008'
...
---
_id: '8915'
abstract:
- lang: eng
text: Ultrasonic linear motors have now been investigated for several years. Their
key features are high thrust forces related to their volume and good position-accuracy.
This contribution consists of two main parts. In the first part we describe the
state-of-the-art of linear piezoelectric motors. Characteristics like no-load
velocity, maximum thrust force and other technical properties of commercially
available devices will be reported as well as those of prototypes. In the second
part we report an ongoing research and development project aiming at a linear
piezoelectric motor, which is capable of surpassing some of the shortcomings of
other piezoelectric motors
author:
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Jörg
full_name: Wallaschek, Jörg
last_name: Wallaschek
citation:
ama: 'Hemsel T, Wallaschek J. State of the art and development trends of ultrasonic
linear motors. In: Ultrasonics Symposium, 2000 IEEE. Vol 1. ; 2000:663-666
vol.1. doi:10.1109/ULTSYM.2000.922635'
apa: Hemsel, T., & Wallaschek, J. (2000). State of the art and development trends
of ultrasonic linear motors. In Ultrasonics Symposium, 2000 IEEE (Vol.
1, pp. 663–666 vol.1). https://doi.org/10.1109/ULTSYM.2000.922635
bibtex: '@inproceedings{Hemsel_Wallaschek_2000, title={State of the art and development
trends of ultrasonic linear motors}, volume={1}, DOI={10.1109/ULTSYM.2000.922635},
booktitle={Ultrasonics Symposium, 2000 IEEE}, author={Hemsel, Tobias and Wallaschek,
Jörg}, year={2000}, pages={663–666 vol.1} }'
chicago: Hemsel, Tobias, and Jörg Wallaschek. “State of the Art and Development
Trends of Ultrasonic Linear Motors.” In Ultrasonics Symposium, 2000 IEEE,
1:663–66 vol.1, 2000. https://doi.org/10.1109/ULTSYM.2000.922635.
ieee: T. Hemsel and J. Wallaschek, “State of the art and development trends of ultrasonic
linear motors,” in Ultrasonics Symposium, 2000 IEEE, 2000, vol. 1, pp.
663–666 vol.1.
mla: Hemsel, Tobias, and Jörg Wallaschek. “State of the Art and Development Trends
of Ultrasonic Linear Motors.” Ultrasonics Symposium, 2000 IEEE, vol. 1,
2000, pp. 663–66 vol.1, doi:10.1109/ULTSYM.2000.922635.
short: 'T. Hemsel, J. Wallaschek, in: Ultrasonics Symposium, 2000 IEEE, 2000, pp.
663–666 vol.1.'
date_created: 2019-04-15T09:52:09Z
date_updated: 2022-01-06T07:04:05Z
department:
- _id: '151'
doi: 10.1109/ULTSYM.2000.922635
intvolume: ' 1'
keyword:
- linear motors
- ultrasonic motors
- linear piezoelectric motor
- maximum thrust force
- no-load velocity
- ultrasonic linear motor
- Electromagnetic devices
- Electromagnetic fields
- Frequency
- Friction
- Gears
- Materials science and technology
- Piezoelectric materials
- Research and development
- Vibrations
- Wheels
language:
- iso: eng
page: 663-666 vol.1
publication: Ultrasonics Symposium, 2000 IEEE
publication_identifier:
issn:
- 1051-0117
quality_controlled: '1'
status: public
title: State of the art and development trends of ultrasonic linear motors
type: conference
user_id: '55222'
volume: 1
year: '2000'
...