Fraunhofer-Gesellschaft

Publica

Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.
2019Analysis of the geometry of the growth ridges and correlation to the thermal gradient during growth of silicon crystals by the Czochralski-method
Stockmeier, Ludwig; Kranert, Christian; Fischer, Peter; Epelbaum, Boris; Reimann, Christian; Friedrich, Jochen; Raming, Georg; Miller, Alfred
Journal Article
2019Considerations on the limitations of the growth rate during pulling of silicon crystals by the Czochralski technique for PV applications
Friedrich, J.; Jung, T.; Trempa, M.; Reimann, C.; Denisov, A.; Muehe, A.
Journal Article
2019Corrigendum to "Particle engulfment dynamics under oscillating crystal growth conditions" [J. Crystal Growth 468 (2017) 24-27]
Tao, Y.; Sorgenfrei, T.; Jauß, T.; Cröll, A.; Reimann, C.; Friedrich, J.; Derby, J.J.
Journal Article
2019Deeper insight into lifetime-engineering in 4H-SiC by ion implantation
Erlekampf, J.; Kallinger, B.; Weiße, J.; Rommel, M.; Berwian, P.; Friedrich, J.; Erlbacher, T.
Journal Article
2019Evaluation of improvement strategies of grain structure properties in high performance multi-crystalline silicon ingots
Trempa, M.; Kranert, C.; Kupka, I.; Reimann, C.; Friedrich, J.
Journal Article
2019Methodology for the investigation of threading dislocations as a source of vertical leakage in AlGaN/GaN-HEMT heterostructures for power devices
Besendörfer, S.; Meissner, E.; Lesnik, A.; Friedrich, J.; Dadgar, A.; Erlbacher, T.
Journal Article
2019Production of high performance multi-crystalline silicon ingots for PV application by using contamination-free SixNy seed particles
Schwanke, S.; Trempa, M.; Reimann, C.; Kuczynski, M.; Schroll, G.; Sans, J.; Friedrich, J.
Journal Article
2019Theoretical aspects and microstructural investigations on V-pit defects in HVPE grown GaN
Knetzger, M.; Meissner, E.; Schröter, C.; Friedrich, J.
Journal Article
2019Thermoelectric properties of silicon and recycled silicon sawing waste
He, R.; Heyn, W.; Thiel, F.; Pérez, N.; Damm, C.; Pohl, D.; Rellinghaus, B.; Reimann, C.; Beier, M.; Friedrich, J.; Zhu, H.; Ren, Z.; Nielsch, K.; Schierning, G.
Journal Article
2018Defects and carrier lifetime in 4H-Silicon Carbide
Kallinger, Birgit; Erlekampf, Jürgen; Rommel, Mathias; Berwian, Patrick; Friedrich, J.; Matthus, Christian D.
Presentation
2018Edge facet dynamics during the growth of heavily doped n-type silicon by the Czochralski-method
Stockmeier, Ludwig; Kranert, Christian; Raming, Georg; Miller, Alfred; Reimann, Christian; Rudolph, Peter; Friedrich, Jochen
Journal Article
2018Elektronik
Bauer, Anton; Bär, Eberhard; Erlbacher, Tobias; Friedrich, Jochen; Lorenz, Jürgen; Rommel, Mathias; Schellenberger, Martin
Book Article
2018Influence and mutual interaction of process parameters on the Z1/2 defect concentration during epitaxy of 4H-SiC
Erlekampf, Jürgen; Kaminzky, Daniel; Rosshirt, Katharina; Kallinger, Birgit; Rommel, Mathias; Berwian, Patrick; Friedrich, Jochen; Frey, Lothar
Conference Paper
2018Optical stressing of 4H-SiC material and devices
Kallinger, B.; Kaminzky, D.; Berwian, P.; Friedrich, J.; Oppel, S.
Conference Paper
2018Principle of lifetime-engineering in 4H-SiC by ion implantation
Erlekampf, Jürgen; Kallinger, Birgit; Berwian, Patrick; Rommel, Mathias; Friedrich, Jochen; Frey, Lothar; Erlbacher, Tobias
Poster
2018Reduction of support structures and building time by optimized path planning algorithms in multi-axis additive manufacturing
Coupek, Daniel; Friedrich, Jens; Battran, David; Riedel, Oliver
Journal Article, Conference Paper
2017Ab initio study of the trimethylaluminum atomic layer deposition process on carbon nanotubes
Förster, A.; Wagner, C.; Schuster, J.; Friedrich, J.
Journal Article
2017Dislocation formation in heavily As-doped Czochralski grown silicon
Stockmeier, Ludwig; Lehmann, Lothar; Miller, Alfred; Reimann, Christian; Friedrich, Jochen
Journal Article, Conference Paper
2017Dynamic Modeling of Critical Velocities for the Pushing/Engulfment Transition in the Si-SiC System Under Gravity Conditions
Kundin, J.; Aufgebauer, H.; Reimann, C.; Seebeck, J.; Friedrich, J.; Jauss, T.; Sorgenfrei, T.; Croell, A.
Journal Article
2017Engulfment and pushing of Si3N4 and SiC particles during directional solidification of silicon under microgravity conditions
Friedrich, J.; Reimann, C.; Jauss, T.; Cröll, A.; Sorgenfrei, T.; Tao, Y.; Derby, J.J.
Journal Article
2017Evolution of grain structure and recombination active dislocations in extraordinary tall conventional and high performance multi-crystalline silicon ingots
Trempa, M.; Kupka, I.; Kranert, C.; Lehmann, T.; Reimann, C.; Friedrich, J.
Journal Article
2017Influence and mutual interaction of process parameters on the Z1/2 defect concentration during epitaxy of 4H-SiC
Erlekampf, Jürgen; Kaminzky, Daniel; Roßhirt, Katharina; Kallinger, Birgit; Rommel, Mathias; Berwian, Patrick; Friedrich, Jochen; Frey, Lothar
Poster
2017Influence of different nucleation layers on the initial grain structure of multicrystalline silicon ingots
Kupka, I.; Lehmann, T.; Trempa, M.; Kranert, C.; Reimann, C.; Friedrich, J.
Journal Article
2017Optical stressing of 4H-SiC material and devices
Kallinger, Birgit; Kaminzky, Daniel; Berwian, Patrick; Friedrich, Jochen; Oppel, Steffen
Poster
2017Particle engulfment dynamics under oscillating crystal growth conditions
Tao, Y.; Sorgenfrei, T.; Jauß, T.; Cröll, A.; Reimann, C.; Friedrich, J.; Derby, J.J.
Journal Article
2017A practical example of GaN-LED failure cause analysis by application of combined electron microscopy techniques
Meissner, E.; Haeckel, M.; Friedrich, J.
Journal Article
2017A quantitative model with new scaling for silicon carbide particle engulfment during silicon crystal growth
Derby, J.J.; Tao, Y.; Reimann, C.; Friedrich, J.; Jauß, T.; Sorgenfrei, T.; Cröll, A.
Journal Article
2017Tiegel zur Herstellung von Silicium-Ingots, Verfahren zu dessen Herstellung sowie Silicium-Ingot
Schneider, Veronika; Reimann, Christian; Friedrich, Jochen; Sans, Jürgen; Kuczynski, Maciej
Patent
2017Waste heat energy harvesting by use of BaTiO3 for pyroelectric hydrogen generation
Belitz, R.; Meisner, P.; Coeler, Matthias; Wunderwald, U.; Friedrich, Jochen; Zosel, J.; Schelter, Matthias; Jachalke, Sven; Mehner, Erik
Journal Article
2016Clarification of the relation between the grain structure of industrial grown mc-Si and the area fraction of electrical active defects by means of statistical grain structure evaluation
Lehmann, T.; Reimann, C.; Meissner, E.; Friedrich, J.
Journal Article
2016Correlation of carbon doping variations with the vertical breakdown of GaN-on-Si for power electronics
Knetzger, M.; Meissner, E.; Derluyn, J.; Germain, M.; Friedrich, J.
Journal Article
2016Dislocation formation in seed crystals induced by feedstock indentation during growth of quasimono crystalline silicon ingots
Trempa, M.; Beier, M.; Reimann, C.; Roßhirth, K.; Friedrich, J.; Löbel, C.; Sylla, L.; Richter, T.
Journal Article
2016Electrically inactive dopants in heavily doped as-grown czochralski silicon
Stockmeier, L.; Elsayed, M.; Krause-Rehberg, R.; Zschorsch, M.; Lehmann, L.; Friedrich, J.
Conference Paper
2016Granulation of extruded plastic wires - influence of tool geometry and process parameters
Cardone, Macario; Putz, Matthias; Schmidt, Gerhard; Dix, Martin; Friedrich, Jürgen; Stockmann, Erich
Journal Article, Conference Paper
2016Granulation of extruded plastic wires: Influence of tool coating properties and tool geometry on cutting forces and tool wear
Cardone, Macario; Putz, Matthias; Schmidt, Gerhard; Dix, Martin; Friedrich, Jürgen; Stockmann, Erich
Conference Paper
2016Imaging defect luminescence of 4H-SiC by ultraviolet-photoluminescence
Berwian, Patrick; Kaminzky, Daniel; Roßhirt, Katharina; Kallinger, Birgit; Friedrich, Jochen; Oppel, Steffen; Schneider, Adrian; Schütz, Michael
Conference Paper
2016Industrie 4.0 - Technical Assets. Basic terminology concepts, life cycles and administration models
: Bangemann, T.; Bauer, C.; Bedenbender, H.; Diesner, M.; Epple, U.; Elmas, F.; Friedrich, J.; Goldschmidt, T.; Göbe, F.; Grüner, S.; Hankel, M.; Heidel, R.; Hesselmann, K.; Hüttemann, G.; Kehl, H.; Löwen, U.; Pfrommer, J.; Schleipen, Miriam; Schlich, B.; Usländer, Thomas; Westerkamp, C.; Winter, A.; Wollschlaeger, M.
Report
2016Industrie 4.0 Service Architecture. Basic concepts for interoperability. Status Report
Bangemann, T.; Bauer, C.; Bedenbender, H.; Braune, A.; Diedrich, C; Diesner, M.; Epple, U.; Elmas, F.; Friedrich, J.; Göbe, F.; Goldschmidt, T.; Grüner, S.; Hankel, M.; Heidel, R.; Hesselmann, K.; Hüttemann, G.; Klein, M.; Löwen, U.; Pfrommer, J.; Rauschecker, U.; Schleipen, Miriam; Schulz, D.; Tasci, T.; Thron, M.; Usländer, T.; Westerkamp, C.; Wollschlaeger, M.
Report
2016Influence of different seed materials on multi-crystalline silicon ingot properties
Reimann, C.; Trempa, M.; Lehmann, T.; Rosshirt, K.; Stenzenberger, J.; Friedrich, J.; Hesse, K.; Dornberger, E.
Journal Article
2016Interaction of SiC particles with moving solid-liquid interface during directional solidification of silicon
Friedrich, J.; Reimann, C.; Jauss, T.; Cröll, A.; Sorgenfrei, T.
Journal Article
2016Investigations of critical structural defects in active layers of GaN-on-Si for power electronic devices
Knetzger, M.; Meissner, E.; Derluyn, J.; Germain, M.; Friedrich, J.
Conference Paper
2016Modelling of effective minority carrier lifetime in 4H-SiC n-type epilayers
Kaminzky, Daniel; Kallinger, Birgit; Berwian, Patrick; Rommel, Mathias; Friedrich, Jochen
Conference Paper
2016Nitride bonded silicon nitride as a reusable crucible material for directional solidification of silicon
Schneider, V.; Reimann, C.; Friedrich, J.; Müller, G.
Journal Article
2016Phase-field simulations of particle capture during the directional solidification of silicon
Aufgebauer, H.; Kundin, J.; Emmerich, H.; Azizi, M.; Reimann, C.; Friedrich, J.; Jauß, T.; Sorgenfrei, T.; Cröll, A.
Journal Article
2016Wetting and infiltration of nitride bonded silicon nitride by liquid silicon
Schneider, V.; Reimann, C.; Friedrich, J.
Journal Article
2015Czochralski growth of silicon crystals
Friedrich, J.; Ammon, W. von; Müller, G.
Book Article
2015Guest Editors' Preface
Klimm, D.; Friedrich, J.
Journal Article
2015Imaging defect luminescence measurements of 4H-SiC by UV-PL
Kaminzky, Daniel; Roßhirt, Katharina; Kallinger, Birgit; Berwian, Patrick; Friedrich, Jochen; Oppel, Steffen; Schneider, Adrian; Schütz, Michael
Presentation
2015Imaging defect luminescence of 4H-SiC by UV-photoluminescence
Kaminzky, Daniel; Roßhirt, Katharina; Kallinger, Birgit; Berwian, Patrick; Friedrich, Jochen; Oppel, Steffen; Schneider, Adrian; Schütz, Michael
Presentation
2015Improvement of 4H-SiC material quality
Kallinger, Birgit; Kaminzky, Daniel; Rommel, Mathias; Berwian, Patrick; Friedrich, Jochen
Presentation
2015Industrie 4.0 - Technical Assets: Grundlegende Begriffe, Konzepte, Lebenszyklen und Verwaltung. Statusreport
: Bangemann, T.; Bauer, C.; Bendenbender, H.; Diesner, M.; Epple, U.; Elmas, F.; Friedrich, J.; Goldschmidt, T.; Göbe, F.; Grüner, S.; Hankel, M.; Heidel, R.; Hesselmann, K.; Hüttemann, G.; Kehl, H.; Löwen, U.; Pfrommer, J.; Schleipen, Miriam; Schlich, B.; Usländer, Thomas; Westerkamp, C.; Winter, A.; Wollschlaeger, M.
Report
2015Influence of grain boundaries intentionally induced between seed plates on the defect generation in quasi-mono-crystalline silicon ingots
Trempa, M.; Reimann, C.; Friedrich, J.; Müller, G.; Krause, A.; Sylla, L.; Richter, T.
Journal Article
2015Influence of growth temperature on the defect density for 4H-SiC homoepitaxy
Kaminzky, Daniel; Roßhirt, Katharina; Kallinger, Birgit; Berwian, Patrick; Friedrich, Jochen
Poster
2015Investigation of iron contamination of seed crystals and its impact on lifetime distribution in Quasimono silicon ingots
Trempa, M.; Reimann, C.; Friedrich, J.; Müller, G.; Sylla, L.; Krause, A.; Richter, T.
Journal Article
2015Modelling of effective minority carrier lifetimes in 4H-SiC n-type epilayers
Kaminzky, Daniel; Kallinger, Birgit; Berwian, Patrick; Rommel, Mathias; Friedrich, Jochen
Poster
2015Optical in-situ monitoring system for simultaneous measurement of thickness and curvature of thick layer stacks during hydride vapor phase epitaxy growth of GaN
Semmelroth, K.; Berwian, P.; Schroter, C.; Leibiger, G.; Schonleber, M.; Friedrich, J.
Journal Article
2015Quality control of SiC materials by optical detection of defects
Kallinger, Birgit; Kaminzky, Daniel; Roßhirt, Katharina; Berwian, Patrick; Friedrich, Jochen; Oppel, Steffen
Presentation
2015Response of as grown dislocation structure to temperature and stress treatment in multi-crystalline silicon
Reimann, C.; Friedrich, J.; Meissner, E.; Oriwol, D.; Sylla, L.
Journal Article
2015Species transport by natural convection of supercritical ammonia
Seebeck, J.; Savva, P.; Erlekampf, J.; Meissner, E.; Friedrich, J.; Frey, L.
Conference Paper
2014Defect formation induced by seed-joints during directional solidification of quasi-mono-crystalline silicon ingots
Trempa, M.; Reimann, C.; Friedrich, J.; Müller, G.; Krause, A.; Sylla, L.; Richter, T.
Journal Article
2014Defektlumineszenz in 4H-SiC
Kaminzky, Daniel; Kallinger, Birgit; Berwian, Patrick; Friedrich, Jochen; Oppel, Steffen; Schütz, Michael
Presentation
2014HCl assisted growth of thick 4H-SiC epilayers for bipolar devices
Kallinger, Birgit; Ehlers, Christian; Berwian, Patrick; Rommel, Mathias; Friedrich, Jochen
Conference Paper
2014Laue scanner: A new method for determination of grain orientations and grain boundary types of multicrystalline silicon on a full wafer scale
Lehmann, T.; Trempa, M.; Meissner, E.; Zschorsch, M.; Reimann, C.; Friedrich, J.
Journal Article
2014New Defect Luminescence Scanner for Inline Control of Material Quality
Kallinger, Birgit; Kaminzky, Daniel; Berwian, Patrick; Oppel, Steffen; Schütz, Michael; Schneider, Adrian; Krieger, Michael; Weber, Jonas; Friedrich, Jochen
Poster
2014Numerical time-dependent 3D simulation of flow pattern and heat distribution in an ammonothermal system with various baffle shapes
Erlekampf, J.; Seebeck, J.; Savva, P.; Meissner, E.; Friedrich, J.; Alt, N.S.A.; Schlücker, E.; Frey, L.
Conference Paper, Journal Article
2014Preferred grain orientations in silicon ribbons grown by the string ribbon and the edge-defined film-fed growth methods
Stockmeier, L.; Müller, G.; Seidl, A.; Lehmann, T.; Reimann, C.; Friedrich, J.
Journal Article
2014Silicon carbide in power electronics: Overcoming the obstacle of bipolar degradation
Kallinger, Birgit; Ehlers, Christian; Berwian, Patrick; Friedrich, Jochen; Rommel, Mathias
Presentation
2014Silicon carbide in power electronics: Overcoming the obstacle of bipolar degradation
Friedrich, J.; Kallinger, B.; Ehlers, C.; Berwian, P.
Presentation
2014Verfahren und Vorrichtung zur Bestimmung der Schmelzhöhe und zur Regulation der Erstarrung und Schmelzung in einem Tiegel
Friedrich, Jochen; Reimann, Christian; Wunderwald, Ulrike
Patent
2014Verfahren zur Behandlung und/oder Recycling von Säge-Slurries
Azizi, Maral; Reimann, Christian; Friedrich, Jochen; Blankenburg, Hans-Joachim; Colditz, Rainer
Patent
2014Verfahren zur Herstellung einer diffusionshemmenden Beschichtung, Tiegel zum Schmelzen und/oder Kristallisieren von Nicht-Eisen Metallen sowie Verwendungszwecke
Reimann, Christian; Obermeier, Sebastian; Trempa, Matthias; Schneider, Veronika; Friedrich, Jochen
Patent
2013Combined global 2D-local 3D modeling of the industrial Czochralski silicon crystal growth process
Jung, T.; Seebeck, J.; Friedrich, J.
Journal Article
2013Comparative study of the luminescence of Al2O3:C and Al2O3 crystals under synchrotron radiation excitation
Zorenko, Y.; Fabisiak, K.; Zorenko, T.; Mandowski, A.; Xia, Q.; Batentschuk, M.; Friedrich, J.; Zhusupkalieva, G.
Journal Article
2013Constitutional supercooling in Czochralski growth of heavily doped silicon crystals
Friedrich, J.; Stockmeier, L.; Müller, G.
Journal Article
2013Experimental verification of the model by Klapper for 4H-SiC homoepitaxy on vicinal substrates
Kallinger, Birgit; Polster, Sebastian; Berwian, Patrick; Friedrich, Jochen; Danilewsky, A.N.
Journal Article
2013HCl assisted growth of thick 4H-SiC epilayers for bipolar devices
Kallinger, Birgit; Ehlers, Christian; Berwian, Patrick; Rommel, Mathias; Friedrich, Jochen
Poster
2013Influence of epilayer thickness and structural defects on the minority carrier lifetime in 4H-SiC
Kallinger, Birgit; Berwian, Patrick; Friedrich, Jochen; Azizi, Maral; Rommel, Mathias; Hecht, Christian; Friedrichs, Peter
Conference Paper
2013Non-isothermal model experiments and numerical simulations for directional solidification of multicrystalline silicon in a traveling magnetic field
Dadzis, K.; Niemietz, K.; Pätzold, O.; Wunderwald, U.; Friedrich, J.
Journal Article
2013Numerical parameter studies of 3D melt flow and interface shape for directional solidification of silicon in a traveling magnetic field
Vizman, D.; Dadzis, K.; Friedrich, J.
Journal Article
2013Step-controlled homoepitaxial growth of 4H-SiC on vicinal substrates
Kallinger, Birgit; Berwian, Patrick; Friedrich, Jochen; Thomas, Bernd
Journal Article
2013SXRT investigations on electrically stressed 4H-SiC PiN diodes for 6.5 kV
Kallinger, Birgit; Berwian, Patrick; Friedrich, Jochen; Hecht, Christian; Peters, Dethard; Friedrichs, Peter; Thomas, Bernd
Conference Paper
2013Unsteady coupled 3D calculations of melt flow, interface shape, and species transport for directional solidification of silicon in a traveling magnetic field
Dadzis, K.; Vizman, D.; Friedrich, J.
Journal Article
2012Analysis of the growth conditions of long single crystalline basal-plane-faceted sapphire ribbons by the Stepanov/EFG technique
Denisov, A.V.; Molchanov, A.; Punin, Y.O.; Krymov, V.M.; Müller, G.; Friedrich, J.
Journal Article
2012Analysis of threading dislocations in 4H-SiC by defect selective etching and X-ray topography
Kallinger, Birgit; Berwian, P.; Friedrich, J.; Danilewsky, A.; Wehrhahn, A.; Weber, A.-D.
Presentation
2012Aufreinigung eines Tiegels für eine Halbleiterverarbeitung
Schneider, Veronika; Reimann, Christian; Friedrich, J.
Patent
2012Cathodoluminescence imaging for the determination of dislocation density in differently doped HVPE GaN
Meissner, E.; Schweigard, S.; Friedrich, J.; Paskova, T.; Udwary, K.; Leibiger, G.; Habel, F.
Journal Article
2012Considerations on the effect of interstitial and precipitated Fe in intentionally Fe-doped mc-silicon
Azizi, M.; Meissner, E.; Friedrich, J.
Conference Paper
2012Doping induced lattice misfit in 4H-SiC homoepitaxy
Kallinger, Birgit; Berwian, Patrick; Friedrich, Jochen; Müller, Georg; Weber, Arnd-Dietrich; Volz, Eduard; Trachta, Gerd; Spiecker, Erdmann; Thomas, Bernd
Journal Article
2012Influence of epilayer thickness and structural defects on the minority carrier lifetime in 4H-SiC
Kallinger, Birgit; Berwian, Patrick; Friedrich, Jochen; Azizi, Maral; Rommel, Mathias; Hecht, Christian; Friedrichs, Peter
Poster
2012Kristalle - Wunderwerkstoffe für die Industrie
Friedrich, J.; Müller, G.
Book Article
2012Mono-crystalline growth in directional solidification of silicon with different orientation and splitting of seed crystals
Trempa, M.; Reimann, C.; Friedrich, J.; Müller, G.; Oriwol, D.
Journal Article
2012SXRT investigations on electrically stressed 4H-SiC PiN diodes for 6.5 kV
Kallinger, Birgit; Berwian, Patrick; Friedrich, Jochen; Hecht, Christian; Peters, Dethard; Friedrichs, Peter; Thomas, Bernd
Poster
2012Systematic characterization of multi-crystalline silicon String Ribbon wafer
Reimann, C.; Müller, G.; Friedrich, J.; Lauer, K.; Simonis, A.; Wätzig, H.; Krehan, S.; Hartmann, R.; Kruse, A.
Journal Article
2012Wiederverwendbarer Tiegel aus einer Siliziumnitrid-Keramik sowie dessen Verwendung bei der Herstellung eines mono- oder multikristallinen Halbmetallkörpers aus einer Schmelze
Mono, T.; Schneider, Veronika; Martin, R.; Reimann, Christian; Friedrich, J.
Patent
20114H-SiC homoepitaxial growth on substrates with different off-cut directions
Kallinger, B.; Thomas, B.; Berwian, P.; Friedrich, J.; Trachta, G.; Weber, A.-D.
Conference Paper
2011Architecture for multilevel monitoring and control of energy consumption
Verl, Alexander; Westkämper, Engelbert; Abele, Eberhard; Dietmair, Anton; Schlechtendahl, Jan; Friedrich, Jens; Haag, Holger; Schrems, Sebastian
Conference Paper
2011DEVICE AND METHOD FOR THE PRODUCTION OF SILICON BLOCKS
Freudenberg, Bernhard; Hollatz, Mark; Trempa, Matthias; Reimann, Christian; Friedrich, Jochen
Patent
2011Device for producing silicon blocks, comprises vessel, which is provided to receive silicon melt and has bottom, inner side, outer side and middle-longitudinal axis, supporting plate, and unit for generating inhomogeneous temperature field
Freudenberg, B.; Radel, G.; Trempa, M.; Dadzis, K.; Dietrich, M.; Nauert, D.; Proske, S.; Reimann, C.; Friedrich, J.
Patent
2011Device useful for producing silicon blocks, comprises a container for receiving a silicon melt with a base, an inner side, an outer side and a central longitudinal axis
Radel, G.; Nauert, D.; Trempa, M.; Dadzis, K.; Dietrich, M.; Proske, S.; Reimann, C.; Friedrich, J.; Freudenberg, B.
Patent
2011Homoepitaxial growth and defect characterization of 4H-SiC epilayers
Kallinger, Birgit; Thomas, Bernd; Berwian, Patrick; Friedrich, Jochen; Weber, Arnd-Dietrich; Volz, Eduard; Trachta, Gerd; Spiecker, Erdmann
Presentation
2011Liquid phase epitaxy (LPE) of GaN on c- and r-faces of AlN substrates
Azizi, M.; Meissner, E.; Friedrich, J.; Müller, G.
Journal Article
2011Model experiments and numerical simulations for directional solidification of multicrystalline silicon in a traveling magnetic field
Dadzis, K.; Ehrig, J.; Niemietz, K.; Pätzold, O.; Wunderwald, U.; Friedrich, J.
Journal Article
2011Numerical study of the influence of different types of magnetic fields on the interface shape in directional solidification of multi-crystalline silicon ingots
Tanasie, C.; Vizman, D.; Friedrich, J.
Conference Paper, Journal Article
2011Threading dislocations in n- and p-type 4H-SiC material analyzed by etching and synchrotron x-ray topography
Kallinger, B.; Polster, S.; Berwian, P.; Friedrich, J.; Müller, G.; Danilewsky, A.N.; Wehrhahn, A.; Weber, A.-D.
Journal Article
2010About the formation and avoidance of C and N related precipitates during directional solidification of multi-crystalline silicon from contaminated feedstock
Reimann, C.; Trempa, M.; Friedrich, J.; Müller, G.
Journal Article
2010Chapter 12: Low pressure solution growth of gallium nitride
Meissner, E.; Hussy, S.; Friedrich, J.
Book Article
2010Dislocation conversion and propagation during homoepitaxial growth of 4H-SiC
Kallinger, B.; Thomas, B.; Polster, S.; Berwian, P.; Friedrich, J.
Conference Paper
2010The influence of growth rate on the formation and avoidance of C and N related precipitates during directional solidification of multi crystalline silicon
Trempa, M.; Reimann, C.; Friedrich, J.; Müller, G.
Journal Article
2010Interactions of dislocations during epitaxial growth of SiC and GaN
Friedrich, J.; Kallinger, B.; Berwian, P.; Meissner, E.
Conference Paper
2010Luminescence of F+ and F centers in AI2O3-Y2O3 oxide compounds
Zorenko, Y.; Zorenko, T.; Voznyak, T.; Mandowski, A.; Xia, Q.; Batentschuk, M.; Friedrich, J.
Journal Article
2010Modeling of incorporation of O, N, C and formation of related precipitates during directional solidification of silicon under consideration of variable processing parameters
Reimann, C.; Trempa, M.; Jung, T.; Friedrich, J.; Müller, G.
Journal Article
2010Optimization and modeling of photovoltaic silicon crystallization processes
Müller, G.; Friedrich, J.
Conference Paper
2010Schlussbericht zum Verbundvorhaben V-Bench - Prozesseinführung und -reifung in der industriellen Praxis
Armbrust, Ove; Münch, Jürgen; Ocampo, Alexis; Soto, Martin; Rausch, Andreas; Bartelt, Christian; Kuhrmann, Marco; Friedrich, Jan; Bergner, Klaus; Sihling, Marc; Bösl, Alexander; Marek, Harald; Ebell, Jan; Thoma, Daniela; Kühn, Matthias
Report
2010Selective etching of dislocations in GaN grown by low-pressure solution growth
Knoke, I.Y.; Berwian, P.; Meissner, E.; Friedrich, J.; Strunk, H.P.; Müller, G.
Journal Article
2010Ultrasound measurement of the position of the growing interface during directional solidification of silicon
Azizi, M.; Meissner, E.; Friedrich, J.
Conference Paper
2009Betaetigungserkennung eines aktiven Arretierungssystems
Schmidt, K.; Taeger, O.; Stieg, J.; Crull, T.; Stehncken, C.; Wolf, M.; Deinzer, G.; Steuer, U.; Mahler, W.; Hofmann, J.; Hufenbach, W.; Dannemann, M.; Renner, O.; Friedrich, J.; Fuessel, R.; Kunze, H.; Kranz, B.
Patent
2009Influence of forced convection on the directional solidification of AlSi alloys: Comparison of experiments and simulation
Dagner, J.; Friedrich, J.; Muller, G.
Conference Paper, Journal Article
2009Influence of growth rate and C/Si-ratio on the formation of point and extended defects in 4H-SiC homoepitaxial layers investigated by DLTS
Zippelius, B.; Krieger, M.; Weber, H.B.; Pensl, G.; Kallinger, B.; Friedrich, J.; Thomas, B.
Conference Paper
2009Influence of substrate preparation and epitaxial growth parameters on the dislocation densities in 4H-SiC epitaxial layers
Kallinger, B.; Thomas, B.; Friedrich, J.
Conference Paper
2009Influence of travelling magnetic fields on melt convection during Bridgeman type solidification of multi-crystalline silicon
Wunderwald, U.; Dadzis, K.; Zschorsch, M.; Jung, T.; Friedrich, J.
Conference Paper
2009Use of travelling magnetic fields to influence melt convection during Bridgman type solidification of multi-crystalline silicon for photovoltaic applications
Dadzis, K.; Zschorsch, M.; Wunderwald, U.; Jung, T.; Friedrich, J.
Conference Paper
2008Crystal growth of compound semiconductors with low dislocation densities
Friedrich, J.; Kallinger, B.; Knoke, I.; Berwian, P.; Meissner, E.
Conference Paper
2008Efficient and robust multi-scale models of conjugate heat transfer and melt crystal growth
Yeckel, A.; Lun, L.; Jung, T.; Friedrich, J.; Derby, J.J.
Conference Paper
2008The importance of convective heat and mass transfer for controlling material properties in ingot casting of multi-crystalline-silicon for photovoltaic applications
Reimann, C.; Jung, T.; Friedrich, J.; Müller, G.
Conference Paper
2008Low-pressure solution growth (LPSG) of GaN templates with diameters up to 3 inch
Hussy, S.; Meissner, E.; Berwian, P.; Friedrich, J.; Müller, G.
Journal Article
2008Modeling of convective eeat and mass transfer processes in crystal growth of silicon for photovoltaic applications
Reimann, C.; Jung, T.; Trempa, M.; Friedrich, J.
Conference Paper
2008Numerical study on the prediction of microstructure parameters by multi-scale modeling of directional solidification of binary aluminum-silicon alloys
Dagner, J.; Friedrich, J.; Müller, G.
Journal Article
2008On the influence of solution density on the formation of macroscopic defects in the liquid phase epitaxy of GaN
Hussy, S.; Berwian, P.; Meissner, E.; Friedrich, J.; Müller, G.
Journal Article
2008Reduction of the dislocation density in GaN during low-pressure solution growth
Knoke, I.Y.; Meissner, E.; Friedrich, J.; Strunk, H.P.; Müller, G.
Journal Article
2008Simulation of dislocation density
Bános, N.; Friedrich, J.; Müller, G.
Journal Article
2008Vapor phase growth of GaN using GaN powder sources and thermogravimetric investigations of the evaporating behaviour of the source material
Kallinger, B.; Meissner, E.; Berwian, P.; Hussy, S.; Friedrich, J.; Mueller, G.
Journal Article
2008Yield improvement and defect control in Bridgman-type crystal growth with the aid of thermal modeling
Friedrich, J.
Conference Paper
20073D time-dependent numerical study of the influence of the melt flow on the interface shape in a silicon ingot casting process
Vizman, D.; Friedrich, J.; Mueller, G.
Journal Article
2007Analysis of the formation of SiC and Si3N4 precipitates during directional solidification of multicrystalline silicon for solar cells
Reimann, C.; Friedrich, J.; Müller, G.; Würzner, S.; Möller, H.J.
Conference Paper
2007Control of melt convection in VGF and CZ crystal growth configurations by using magnetic fields
Friedrich, J.
Book Article
2007Fifth International Workshop on Modeling in Crystal Growth, IWMCG 2006. Proceedings
: Müller, G.; Friedrich, J.
Conference Proceedings
2007Influence of different types of magnetic fields on the interface shape in a 200 mm Si-EMCZ configuration
Vizman, D.; Watanabe, M.; Friedrich, J.; Müller, G.
Conference Paper, Journal Article
2007IWMCG 2006, Fifth Workshop on Modeling in Crystal Growth. Preface
Müller, G.; Friedrich, J.
Conference Paper
2007A new hybrid method for the global modeling of convection in CZ crystal growth configurations
Fainberg, J.; Vizman, D.; Friedrich, J.; Mueller, G.
Conference Paper, Journal Article
2007Study on the kinetics of the formation reaction of GaN from Ga-solutions under ammonia atmosphere
Sun, G.; Meissner, E.; Berwian, P.; Müller, G.; Friedrich, J.
Conference Paper, Journal Article
2007Study on the sublimation growth of GaN using different powder sources and investigation on the sublimation behaviour of GaN powder by means of thermogravimetry
Kallinger, B.; Meissner, E.; Seng, D.; Sun, G.; Hussy, S.; Friedrich, J.; Müller, G.
Journal Article
2007Verfahren zum Bearbeiten eines Substrats
Berwian, P.; Friedrich, J.
Patent
2006Characterisation of the electrical properties of solution-grown GaN crystals by reflectivity and Hall measurements
Birkmann, B.; Salcianu, C.; Meissner, E.; Hussy, S.; Friedrich, J.; Müller, G.
Journal Article
2006A combined numerical and experimental study of the effects of controlled fluid flow on alloy solidification
Steinbach, S.; Dagner, J.; Hainke, M.; Friedrich, J.; Ratke, L.
Conference Paper
2006Considerations on facetting and on the atomic structure of the phase boundary in low-pressure solution growth of GaN
Birkmann, B.; Hussy, S.; Sun, G.; Berwian, P.; Meissner, E.; Friedrich, J.; Müller, G.
Journal Article
2006Global modeling of heat transfer during solidification experiments
Dagner, J.; Hainke, M.; Jung, T.; Kellner, M.; Hadler, H.; Friedrich, J.; Mueller, G.
Conference Paper
2006Large modification of crystal-melt interface shape during Si crystal growth by using electromagnetic Czochralski method (EMCZ)
Watanabe, M.; Vizman, D.; Friedrich, J.; Müller, G.
Conference Paper, Journal Article
2006Morphologies of GaN single crystals grown from Ga solutions under flowing ammonia
Sun, G.; Meissner, E.; Hussy, S.; Birkmann, B.; Friedrich, J.; Müller, G.
Conference Paper, Journal Article
2006Simulation of ESA's msl furnace inserts and sample-cartridge assemblies using the thermal modeling tool Crysvun
Hainke, M.; Dagner, J.; Friedrich, J.; Müller, G.
Conference Paper
2006Verfahren zur Erhoehung des Umsatzes von Gruppe-III-Metall zu Gruppe-III-Nitrid in einer Gruppe-III-haltigen Metallschmelze
Friedrich, J.; Mueller, G.; Meissner, E.; Birkmann, B.; Hussy, S.
Patent
2006Verfahren zur Herstellung von Gruppe-III-Nitrid-Volumenkristallen oder-Kristallschichten aus Metallschmelzen
Friedrich, J.; Mueller, G.; Apelt, R.; Meissner, E.; Birkmann, B.; Hussy, S.
Patent
2006Vorrichtung und Verfahren zur Herstellung von Schichten und/oder Kristallen aus Nitriden von Metallen der Gruppe III des PSE sowie entsprechende Einkristalle
Meissner, E.; Müller, G.; Friedrich, J.
Patent
2006Yield improvement and advanced defect control-driving forces for modeling of bulk crystal growth
Mueller, G.; Friedrich, J.
Journal Article
2005Beschichtungen auf Kunststoff
: Ondratschek, Dieter (Seminarleitung); Hoffmann, Ulrich (Seminarleitung); Beck, Erich (Seminarleitung); Friedrich, Jörg (Seminarleitung)
Conference Proceedings
2005Characterisation of GaN crystals and epilayers grown from a solution at room pressure
Meissner, E.; Birkmann, B.; Hussy, S.; Sun, G.; Friedrich, J.; Müller, G.
Journal Article
2005Erlanger Kristall-Labor bei Weltraummission dabei
Friedrich, J.; Müller, G.
Journal Article
2005Growth and characterization of 2" and 4" low EPD InP substrate crystals by the Vertical Gradient Freeze (VGF)-method
Schwesig, P.; Sahr, U.; Friedrich, J.; Müller, G.; Köhler, A.; Kretzer, U.; Eichler, S.; Mühe, A.
Conference Paper
2005Macrosegregation in binary AlSi7 alloys resulting from the application of time dependent magnetic fields
Hainke, M.; Dagner, J.; Friedrich, J.; Müller, G.
Journal Article
2005MICAST - The effect of magnetically controlled fluid flow on microstructure evolution in cast technical Al-alloys
Ratke, L.; Steinbach, S.; Mueller, G.; Hainke, M.; Friedrich, J.; Roosz, A.; Fautrelle, Y.; Dupuoy, M.D.; Zimmermann, G.; Weiss, A.; Lacaze, J.; Valdes, R.; Gruen, G.U.; Nicolai, H.-P.; Gerke-Cantow, H.
Journal Article
2005Modeling of industrial bulk crystal growth - State of the art and challenges
Fischer, B.; Friedrich, J.; Jung, T.; Hainke, M.; Dagner, J.; Fühner, T.; Schwesig, P.
Journal Article
2005Numerical simulation of the feeding process, flow field and solute segregation in edge-defined film fed growth of photovoltaic silicon
Bellmann, M.; Möller, H.J.; Fainberg, J.; Friedrich, J.; Seidl, A.; Müller, G.
Conference Paper
2005Simulation of ESA's MSL furnace inserts and sample-cartridge assemblies: Model development and correlation wirth experimental data
Dagner, J.; Hainke, M.; Friedrich, J.
Report
2005Spezielle Kristalle für weißes Licht
Friedrich, J.; Müller, G.
Journal Article
2005Study of the oxygen incorporation during growth of large CaF2-crystals
Molchanov, A.; Friedrich, J.; Wehrhan, G.; Müller, G.
Journal Article
2004Beschichtungen auf Kunststoff
: Ondratschek, D.; Hoffmann, U.; Beck, E.; Friedrich, J.
Conference Proceedings
2004Challenges in modeling of bulk crystal-growth
Müller, G.; Friedrich, J.
Conference Paper, Journal Article
2004Comparative numerical study of the effects of rotating and travelling magnetic fields on the interface shape and thermal stress in the VGF growth of InP crystals
Schwesig, P.; Hainke, M.; Friedrich, J.; Mueller, G.
Conference Paper, Journal Article
2004Growth of GaN crystals and epilayers from solutions at ambient pressure
Meissner, E.; Sun, G.; Hussy, S.; Birkmann, B.; Friedrich, J.; Müller, G.
Conference Paper
2004A matrix based correction scheme of the liquid fraction during columnar solidification
Hainke, M.; Friedrich, J.; Müller, G.
Journal Article
2004Numerical study on directional solidification of AlSi alloys with rotating magnetic fields under microgravity conditions
Hainke, M.; Friedrich, J.; Müller, G.
Journal Article
2004Three-dimensional modeling of melt flow and interface shape in the industrial liquid-encapsulated Czochralski growth of GaAs
Vizman, D.; Eichler, S.; Friedrich, J.; Müller, G.
Conference Paper, Journal Article
2004Vorrichtung zum Versorgen einer Prozesskammer mit fluiden Medien
Hilburger, U.; Molchanov, A.; Ossege, S.; Miller, M.; Friedrich, J.; Wehrhan, G.
Patent
20033D numerical simulation of rayleigh-benard convection in an electrically conducting melt acted on by a traveling magnetic field
Socoliuc, V.; Vizman, D.; Fischer, B.; Friedrich, J.; Müller, G.
Journal Article
2003Effects of time-dependent magnetic fields on directional solidification of AlSi7 alloys
Dagner, J.; Hainke, M.; Friedrich, J.; Müller, G.
Conference Paper
2003MHD effects in semiconductor crystal growth and alloy solidification
Hainke, M.; Friedrich, J.; Vizman, D.; Müller, G.
Conference Paper
2003MICAST - the effect of magnetically controlled fluid flow on the solidification of technical Al-alloys under microgravity conditions
Hainke, M.; Friedrich, J.; Müller, G.
Journal Article
2003Numerical modeling of crystal growth and solidification experiments carried out under microgravity conditions
Friedrich, J.; Dagner, J.; Hainke, M.; Müller, G.
Journal Article
2003Numerical study of the effects of rotating magnetic fields during VGF growth of 3" GaAs crystals
Hainke, M.; Friedrich, J.; Müller, G.
Conference Paper, Journal Article
2003Optimization of the growth of CaF2 crystals by model experiments and numerical simulation
Molchanov, A.; Graebner, O.; Wehrhan, G.; Friedrich, J.; Müller, G.
Journal Article
2003Zur Bedeutung des Nutzungskontextes im Dokumentenmanagment: Empirische Befunde und technische Lösungsansätze
Hinrichs, J.; Friedrich, J.; Wulf, V.
Conference Paper
2002Equipment and process modeling of industrial crystal growth using the finite volume codes CrysVUN and STHAMAS
Hainke, M.; Jung, T.; Friedrich, J.; Fischer, B.; Metzger, M.; Müller, G.
Conference Paper
2002Experimental verification of the numerical model for a CaF2 crystal growth process
Molchanov, A.; Hilburger, U.; Friedrich, J.; Finkbeiner, M.; Wehrhan, G.; Müller, G.
Journal Article
2002Juwelen für Innovation
Müller, G.; Friedrich, J.
Journal Article
2002Numerical simulation of formation of grain structure and global heat transport during solidification of technical alloys in MSL inserts
Friedrich, J.; Backofen, R.; Müller, G.
Journal Article
2002Systematic study of the influence of the Czochralski hot zone design on the point defect distribution with respect to a perfect crystal
Krause, M.; Friedrich, J.; Müller, G.
Conference Paper, Journal Article
2002Temperaturmessanordnung fuer den Einsatz in chemisch aggressiven Medien und bei Temperaturen von groesser 1000 Grad C
Molchanov, A.; Hilburger, U.; Friedrich, J.
Patent
2002Thermoelementanordnung zur Temperaturmessung in chemisch aggressiven Medien und bei Temperaturen groesser 1000 Grad C
Molchanov, A.; Hilburger, U.; Friedrich, J.
Patent
2001Comparison of the predictions from 3D numerical simulation with temperature distributions measured in Si Czochralski melts under the influence of different magnetic fields
Vizman, D.; Friedrich, J.; Müller, G.
Journal Article
20003D numerical simulation of melt flow in the presence of a rotating magnetic field
Vizman, D.; Fischer, B.; Friedrich, J.; Müller, G.
Journal Article
2000High performance computing for the analysis of the influence of steady magnetic fields on convective heat transfer in Czochralski melts. Comparison to experimental results
Friedrich, J.; Fischer, B.; Gräbner, O.; Vizman, D.; Müller, G.
Conference Paper
2000On void engulfment in shaped sapphire crystals using 3D modelling
Nicoara, I.; Vizman, D.; Friedrich, J.
Journal Article
2000Systematic study of buoyant flows in vertical melt cylinders under the influence of rotating magnetic fields
Fischer, B.; Friedrich, J.; Hilburger, U.; Müller, G.
Conference Paper
2000Three dimensional numerical simulation of thermal convection in a Czochralski melt
Vizman, D.; Friedrich, J.; Müller, G.
Conference Paper
1999Experimental and numerical analysis of the influence of a rotating magnetic field on convection in rayleigh benard configurations
Fischer, B.; Friedrich, J.; Kupfer, C.; Müller, G.; Vizman, D.
Conference Paper
1999Experimental and numerical study of rayleigh-benard convection affected by a rotating magnetic field
Friedrich, J.; Lee, Y.; Fischer, B.; Kupfer, C.; Vizman, D.; Müller, G.
Journal Article
1999The influence of steady and alternating magnetic fields in crystal growth and alloy solidification
Friedrich, J.; Müller, G.
Conference Paper
1999Möglichkeiten zur Beeinflussung der Produktausbeute bei der Sprühtrocknung durch Wahl der Zerstäubungs- und Trocknungsparameter
Friedrich, J.
Thesis
1999Temperature and velocity analysis in vertical melt cylinders under the influence of rotating magnetic fields and buoyant convection
Fischer, B.; Hilburger, U.; Friedrich, J.; Müller, G.
Conference Paper
1999The use of magnetic fields in crystal growth and alloy solidification: Importance for industrial technologies and for microgravity research
Friedrich, J.; Müller, G.
Journal Article
1999The use of time-dependent magnetic fields for control of convective flows in melt growth configurations
Fischer, B.; Friedrich, J.; Weimann, H.; Müller, G.
Journal Article
1996Qualitätsorientierte Fertigung
Stober, T.; Wiedenmann, H.; Friedrich, J.; Kuhn, A.; Langhoff, T.
Book Article