Journal Papers

2023:

2022:

2021:

 

2020:

  • M. Schmid, S. K. Bhogaraju, E. Liu, and G. Elger, “Comparison of Nondestructive Testing Methods for Solder, Sinter, and Adhesive Interconnects in Power and Opto-Electronics,” Applied Sciences, vol. 10, no. 23, p. 8516, 2020, doi: 10.3390/app10238516.
  • Liu, E., Conti, F., Bhogaraju, S. K., Signorini, R., Pedron, D., Wunderle, B., & Elger, G. (2020). Thermomechanical stress in GaN‐LEDs soldered onto Cu substrates studied using finite element method and Raman spectroscopy. Journal of Raman Spectroscopy, 51(10), 2083-2094.
  • Schmid, M., Bhogaraju, S. K., Hanss, A., & Elger, G. (2020). A new Noise-Suppression Algorithm for Transient Thermal Analysis in Semiconductors over Pulse Superposition. IEEE Transactions on Instrumentation and Measurement.
mehr
  • Kleiner, J., Heider, A., Hanzl, C., Komsiyska, L., Elger, G. & Endisch, C. (2020). Thermal behavior of an intellegent lithium-ion cell under vehicle conditions. Submitted to IECON.
  • Bhogaraju, S. K., Conti, F., Kotadia, H. R., Tetzlaff, U. & Elger, G. (2020). Die-attach bonding using surface enhanced copper and brass micro flakes in polyethylene glycol. Journal of Alloys and Compounds, 844, 156043.
  • Kleiner, J., Singh, R., Schmid, M., Komsiyska, L., Elger, G. & Endisch, C. Influence of Heat Pipe Assisted Terminal Cooling on the Thermal Behavior of a Large Prismatic Lithium-Ion Cell during Fast Charging in Electric Vehicles. Submitted to Journal of Power Sources.
  • Kleiner, J., Komsiyska, L., Elger, G. & Endisch, C. (2020). Thermal Modelling of a Prismatic Lithium-Ion Cell in a Battery Electric Vehicle Environment: Influences of the Experimental Validation Setup. Energies 2020, 13(1), 62.
  • Bhogaraju, S. K., Conti, F., Kotadia, H. R., Keim, S., Tetzlaff, U., & Elger, G. (2020). Novel approach to copper sintering using surface enhanced brass micro flakes for microelectronics packaging. Journal of Alloys and Compounds, 844, 156043.

  • Bhogaraju, S. K., Mokhtari, O., Conti, F., & Elger, G. (2020). Die-attach bonding for high temperature applications using thermal decomposition of copper (II) formate with polyethylene glycol. Scripta Materialia, 182, 74-80.

2019:

  • Mokhtari, O., Conti, F., Bhogaraju, S. K., Meier, M., Schweigart, H., Tetzlaff, U., & Elger, G. (2019). Characterization of tin-oxides and tin-formate crystals obtained from SnAgCu solder alloy under formic acid vapor. New Journal of Chemistry, 43(26), 10227-10231.

  • Mokhtari, O. (2019). A review: Formation of voids in solder joint during the transient liquid phase bonding process-Causes and solutions. Microelectronics Reliability, 98, 95-105.

2018:

  • Conti, F., Hanss, A., Mokhtari, O., Bhogaraju, S. K., & Elger, G. (2018). Formation of tin-based crystals from a SnAgCu alloy under formic acid vapor. New Journal of Chemistry, 42(23), 19232-19236.

  • Hanss, A., & Elger, G. (2018). Residual free solder process for fluxless solder pastes. Soldering & Surface Mount Technology.

2017:

  • Liu, E., Zahner, T., Besold, S., Wunderle, B., & Elger, G. (2017). Location resolved transient thermal analysis to investigate crack growth in solder joints. Microelectronics Reliability, 79, 533-546.

2016:

  • Elger, G., Müller, D., Hanß, A., Schmid, M., Liu, E., Karbowski, U., & Derix, R. (2016). Transient thermal analysis for accelerated reliability testing of LEDs. Microelectronics Reliability, 64, 605-609.

  • Liu, E., Hanss, A., Schmid, M., & Elger, G. (2016). The influence of the phosphor layer as heat source and up-stream thermal masses on the thermal characterization by transient thermal analysis of modern wafer level high power LEDs. Microelectronics Reliability, 67, 29-37.

  • Conti, F., Hanss, A., Fischer, C., & Elger, G. (2016). Thermogravimetric investigation on the interaction of formic acid with solder joint materials. New Journal of Chemistry, 40(12), 10482-10487.

2015:

  • Alexander, H., Maximilian, S., Liu, E., & Gordon, E. (2015). Transient thermal analysis as measurement method for IC package structural integrity. Chinese Physics B, 24(6), 068105.

  • Elger, G., Kandaswamy, S. V., Liu, E., Hanss, A., Schmid, M., Derix, R., & Conti, F. (2015). Analysis of solder joint reliability of high power LEDs by transient thermal testing and transient finite element simulations. Microelectronics Journal, 46(12), 1230-1238.

2014:

  • Elger, G., Hutter, M., Rauschenbach, S., & Willwohl, H. (2014, May). Performance of improved SAC solders under high thermo-mechanical stress condition. In Proceedings of IEEE Electronics Circuits World Convention (ECWC13).

  • Elger, G., Kandaswamy, S. V., Derix, R., & Wilde, J. (2014). Transient thermal analysis as a highly sensitive test method for the reliability investigation of high power LEDs during temperature cycle tests. Journal of Microelectronics and Electronic Packaging, 11(2), 51-56.

2013:

  • Elger, G., Kandaswamy, S. V., Derix, R., & Wilde, J. (2013, January). Transient Thermal Analysis as a Test Method for the Reliability Investigation of High Power LEDs during Temperature Cycle Tests. In International Symposium on Microelectronics (Vol. 2013, No. 1, pp. 000902-000907). International Microelectronics Assembly and Packaging Society.

2012:

  • Conti, F., Negro, E., Di Noto, V., Elger, G., Berthold, T. & Weber, S. (2012, April). Time-resolved ESR investigation on energy transfer processes in Nafion photochemistry. In 2012 International Journal of Hydrogen Energy, 37(7), 6317-6325.

Conference Papers

2023:

  • S. Agrawal, K. Doycheva, S. Bhanderi, G. Elger, "Instance Segmentation and Detection of Children to Safeguard Vulnerable Traffic User by Infrastructure", Aprl. 2023 Conference: 9th International Conference on Vehicle Technology and Intelligent Transport Systems (VEHITS), At: Prague, DOI:10.5220/0011825400003479

2022:

  • S. Agrawal, R. Song, A. Kohli, A. Korb "Concept of Smart Infrastructure for Connected Vehicle Assist and Traffic Flow Optimization"  Jan. 2022, Conference: 8th International Conference on Vehicle Technology and Intelligent Transport Systems; DOI:10.5220/0011068800003191

  • E. Streck, R.  Herschel, P. Wallrath, M. Sunderam, "Comparison of Two Different Radar Concepts for Pedestrian Protection on Bus Stops", Jan. 2022 Conference: 11th International Conference on Sensor Networks, , DOI:10.5220/0010777100003118

  • S.K. Bhogaraju, N. Mohan, R. Saccon and G. Elger "Copper sintering for microelectronics application"  April 2022,  Conference: 3. Symposium Elektronik und Systemintegration ESI 2022At: Landshut, Germany 

  • A. Pandey, S. K. Bhogaraju, K. Lux and G. Elger "Analysis of stress in spherically bent thinned image sensors ", April 2022, Conference: EurosimeE 2022, DOI:10.1109/EuroSimE54907.2022.9758847

  • R. Saccon, A. Benin, S. K Bhogaraju and G. Elger "Effect of binders on the performance of copper sintering pastes" May 2022, Conference: International Conference on Electronics Packaging (ICEP), DOI:10.23919/ICEP55381.2022.9795555

  • E.Liu, S. K. Bhogaraju, K. Lux and G. Elger "Investigation Of Stress Generated By Interconnection Processes With Micro-Raman Spectroscopy (μRS)", July 2022 Conference: 73rd ECTC 2022, At: San Diego, USA, DOI:10.1109/ECTC51906.2022.00123

  • M. Schmid, J. Hermann, E. Liu and G. Elger, "Correlation of Scanning Acoustic Microscopy and Transient Thermal Analysis to Identify Crack Growth in Solder Joints" July 2022. Conference: iTherm: Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic SystemsAt: San Diego, USA, DOI:10.1109/iTherm54085.2022.9899664

  • S. K. Bhogaraju, M. Schmid, E. Liu, R. Saccon "Low cost copper based sintered interconnect material for optoelectronics packaging" July 2022, Conference: 73rd ECTC 2022 At: San Diego, USA,  DOI:10.1109/ECTC51906.2022.00270

  • H. Schwann, G. Elger, J. Pforr "ZVS Class E2 Wireless Power Transfer System with Self-Resonant Transmission Coils for the Biomedical Application2" August 2022; Conference: PCIM Europe ,International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management At: Nuremberg, Germany, DOI:10.30420/565822107

  • P. Hausmann, H. Meeß and G. Elger, "IMAGE SEGMENTATION BASED EMERGENCY LANDING FOR AUTONOMOUS AND AUTOMATED UNMANNED AERIAL VEHICLES",  September 2022, Conference: 33rd Congress of the international Council of the Aeronautical Science (ICAD2022), At: Stockholm Sweden

  • J. Hermann, M. Schmid, S. K. Bhogaraju and G. Elger "Reliability of SAC Solders under Low and High Stress Conditions",  Sep 2022, Conference: 9th Electronics System-Integration Technology Conference, At: Sibui, Romania, DOI:10.1109/ESTC55720.2022.9939394
  • N. Mohan, S. Langer, G. Elger, "Fluxfree solder paste and process for standard SMD components",  Conference: Sep. 2022 9th Electronics System-Integration Technology Conference, At: Sibiu, Romania, DOI:10.1109/ESTC55720.2022.9939528
  • A. Zippelius, J. Hermann, T. Strobl, A. Hoffmann, "Predicting thermal resistance of solder joints based on Scanning Acoustic Microscopy using Artificial Neural Networks", Sep. 2022, Conference: 9th Electronics System-Integration Technology Conference, At: Sibiu, Romania, DOI:10.1109/ESTC55720.2022.9939465
  • J. Hermann, M. Schmid and G. Elger, "Crack Growth Prediction in High-Power LEDs from TTA, SAM and Simulated Data" Sep. 2022; Conference: International Workshop on Thermal Investigations of ICs and Systems (Therminic2022), At: Dublin, Ireland, DOI:10.1109/THERMINIC57263.2022.9950673
  • H. Schwann, M. Schmid and G. Elger, "Laser Stimulated Transient Thermal Analysis of Semiconductors" Sep. 2022; Conference: 28TH INTERNATIONAL WORKSHOP THERMAL INVESTIGATIONS OF ICS AND SYSTEMS (Therminic 2022), At: Dublin, Ireland, DOI:10.1109/THERMINIC57263.2022.9950672
  • M. Kettelgerdes, G. Elger "Modeling Methodology and In-field Measurement Setup to Develop Empiric Weather Models for Solid-State LiDAR Sensors" Okt. 2022; Conference: IEEE 2nd International Conference on Digital Twins and Parallel Intelligence (DTPI), DOI:10.1109/DTPI55838.2022.9998918
  • N. Mohan, S. K. Bhogaraju, R. Soccon and G. Elger, "Cu complex inks for printed electronics application-challenges and solutions", Nov. 2022; Conference: 9. GMM-Fachtagung Mikro-Nano-Integration (MNI) 2022, At: Aachen, German

2021:

  • M. Kettelgerdes, G. Elger, L Böhm "Correlating Intrinsic Parameters and Sharpness for Condition Monitoring of Automotive Imaging Sensors" Nov. 2021;  Conference: 5th International Conference on System Reliability and Safety (ICSRS), DOI:10.1109/ICSRS53853.2021.9660665

  • M. Kettelgerdes, G. Elger, L Böhm "Predicting temperature induced defocus of automotive imaging sensors by precise camera re-calibration" Nov. 2021;  Conference: ICSRS - International Conference on System Reliability and Safety, November 24-26, 2021 in Palermo, ItalyAt: Palermo, Italy

  • E. Streck, P.  Schmock, K. Schneider, H. Erdoğan, "Safeguarding Future Autonomous Traffic by Infrastructure based on Multi Radar Sensor Systems" Sep. 2021, Conference: FISITA World Congress, At: Prague, Czech Republic, online, DOI:10.46720/F2021-ACM-121

  • M. Schmid and G. Elger "Reliability of SAC+ Solders for LED Packages" September 2021; Conference: 26th IEEE International Workshop on InternatIonal Workshop on thermal Investigations of ICs and systems At: virtual event,  DOI:10.1109/THERMINIC52472.2021.9626502

  • S. Agrawal and G. Elger, "Concept of Infrastructure Based Environment Perception for IN2Lab test field for Automated Driving", Sep. 2021;  Conference: IEEE International Smart Cities Conference, At: Virtual Conference, DOI:10.1109/ISC253183.2021.9562894

  • M. Schmid,  S.K. Bhogaraju, H.R. Kotadia and F. Conti, "Highly reliable die-attach bonding with etched brass flakes" Sep. 2021; Conference: 23rd European Microelectronics and Packaging Conference & Exhibition (EMPC), DOI:10.23919/EMPC53418.2021.9584967

  • S.K. Bhogaraju, N. Mohan, M, Lysien, L. Schneider, "Drop feature optimization for fine trace inkjet printing" Sep.2021; Conference: 23rd European Microelectronics and Packaging Conference & Exhibition, DOI:10.23919/EMPC53418.2021.9585004

  • M. Schmid, S. K. Bhogaraju, and G. Elger, “Characterization Of Copper Sintered Interconnects By Transient Thermal Analysis,”May. 2021; nternational Conference on Electronics Packaging (ICEP), Tokyo, Japan, - May. 2021, pp. 71–72.
  • Numan Senel, Shrivatsa Udupa and Gordon Elger. "Sensor Data Preprocessing in Road-Side Sensor Units" FISITA 2021 World Congress (F2021-ACM-120)

  • J. Pascucci, F.Conti, S.K Bhogaraju and F. Signorini "Micro-Raman to detect stress phenomena in Si-chips bonded onto Cu substrates"  Conference: Integrated Optics: Design, Devices, Systems and Applications VI, April 2021, DOI:10.1117/12.2576414

  • F. Conti, K. Lux,  S. K. Bhogaraju, E. Liu, "Raman spectroscopy to investigate gallium nitride light emitting diodes after assembling onto copper substrates" , Conference: Optical Sensors April 2021, DOI:10.1117/12.2591947

  • F. Conti, S. K. Bhogaraju, E. Liu and G. Elger "Simulations and Experiments to Analyze Stress Phenomena in Soldered and Sintered Interconnections between Silicon Nitride chips and Copper Substrates"  Conference: April 2021 22nd International Conference on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems (EuroSimE), DOI:10.1109/EuroSimE52062.2021.9410869

  • M. Tavakolibasti, P. Meszmer, G.  Bottger, and M. Kettelgerdes,, "Thermo-mechanical-optical coupling within a digital twin development for automotive LiDAR",  Conference: April 2021 22nd International Conference on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems (EuroSimE), DOI:10.1109/EuroSimE52062.2021.9410831

  • J. Kleiner, A. Heider, L. Komsiyska and G. Elger "Experimental Study on the Thermal Interactions in Novel Intelligent Lithium-Ion Modules for Electric Vehicles"   Conference: Jun. 2021 20th IEEE Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems (iTherm), DOI:10.1109/ITherm51669.2021.9503299

  • M. Schmid,  S.K. Bhogaraju, E. Hufnagel and F. Conti "Low temperature and low pressure die-attach bonding of high power light emitting diodes with self reducing copper complex paste"  Conference: Jun. 2021 IEEE 71st Electronic Components and Technology Conference (ECTC), DOI:10.1109/ECTC32696.2021.00094

  • J. Kleiner, L. Lechermann, L. Komsiyska and G. Elger "Thermal Effects of Bad-Block-Management in an Intelligent Automotive Lithium-ion Battery Module based on lumped 3D Electro-Thermal Modeling",  Conference: Jun. 2021 IEEE Transportation Electrification Conference & Expo (ITEC) DOI:10.1109/ITEC51675.2021.9490059

2020:

  • Schmid, M., Bhogaraju, S. K., Riedel, A. & Elger, G. (2020 September). Development of an In-Line Capable Transient Thermal Analysis Equipment for a Power Module with Five Half Bridges. In 2020 25th IEEE International Workshop on Thermal Investigations of ICs and Systems. Paper accepted.
  • Numan Senel, Gordon Elger and Andreas Festag.  Sensor Time Synchronization in Smart Road Infrastructure. FISITA 2020 World Congress (F2020-ACM-083).
  • Liu, E., Schmid, M., Bhogaraju, S. K. & Elger, G. (2020 September). Advanced Location Resolved Transient Thermal Analysis. In 25th IEEE International Workshop on Thermal Investigations of ICs and Systems. Paper accepted.
  • Kühn, S., Pandey, A., Zippelius, A., Schneider, K., Erdogan, H., & Elger, G. (2020, September). Analysis of package design of optic modules for automotive cameras to realize reliable image sharpness. In 2020 IEEE 8th Electronics System-Integration Technology Conference (ESTC) (pp. 1-6). IEEE.
mehr
  • Conti, F., Liu, E., Bhogaraju, S. K., Wunderle, B., & Elger, G. (2020, September). Finite Element simulations and Raman measurements to investigate thermomechanical stress in GaN-LEDs. In 2020 IEEE 8th Electronics System-Integration Technology Conference (ESTC) (pp. 1-7). IEEE.
  • Zippelius, A., Hanß, A., Liu, E, Schmid M., Pérez-Velázquez, J., Elger G.(2020, July). Comparing prediction methods for LED failure measured with Transient Thermal Analysis. In 2020 21st International Conference on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems (EuroSimE) (pp. 1-7). IEEE.
  • Pandey, A., Kühn, S., Erdogan, H., Schneider, K., & Elger, G. (2020, July). Finite Element Analysis: A Tool for Investigation of Sharpness Changes in Automotive Cameras. In 2020 21st International Conference on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems (EuroSimE) (pp. 1-7). IEEE.
  • Bhogaraju, S. K., Conti, F., Schmid, M., Meier, M. R., Schweigart, H., & Elger, G. (2020, March). Development of sinter paste with surface modified copper alloy particles for die-attach bonding. In CIPS 2020; 11th International Conference on Integrated Power Electronics Systems (pp. 1-6). VDE.
  • Elger, G., Mokhtari, O., Bhogaraju, S. K., Conti, F., Meier, M. & Schweigart, H. (2020 Februar). Analyse der Reaktionsprodukte von Metall-Formiaten im rückstandsfreien Lötprozess. Elektronische Baugruppen und Leiterplatten, 18.-19. Februar 2020, Fellbach, Germany.

2019:

  • Bhogaraju, S. K., Mokhtari, O., Pascucci, J., Conti, F., Kotadia, H. R., & Elger, G. (2019, October). A multi-pronged approach to low-pressure Cu sintering using surface-modified particles, substrate and chip metallization. In International Symposium on Microelectronics (Vol. 2019, No. 1, pp. 000387-000392). International Microelectronics Assembly and Packaging Society.

  • Bhogaraju, S. K., Mokhtari, O. & Elger, G. (2019, Oktober). Hybride Kupfer Sinter Paste für Hochtemperaturanwendungen. In 2019 IMPAS Herbsttagung, 17. Oktober, München, Germany.

  • Bhogaraju, S. K., Mokhtari, O., Pascucci, J., Hanss, A., Schmid, M., Conti, F., & Elger, G. (2019, September). Hybrid Cu particle paste with surface-modified particles for high temperature electronics packaging. In 2019 22nd European Microelectronics and Packaging Conference & Exhibition (EMPC) (pp. 1-8). IEEE.

  • Kleiner, J., Komsiyska, L., Elger, G. & Endisch, C. (2019, September). Modelling of 3D Temperature Behavior of Prismatic Lithium-Ion Cell with focus on Experimental Validation under Battery Electric Vehicle Conditions. In 2019 24th IEEE International Workshop on Thermal Investigations of ICs and Systems (pp. 25-27).

  • Schmid, M., Hanss, A. & Elger, G. (2019, September). Analysis of Improved SAC+ Solders for CSP LEDs on AI-IMS. In 2019 LED Professional Symposium + Expo 2019 LpS 2019, 24.-26. September, Bregenz, Austria.

  • Bhogaraju, S. K., Mokhtari, O., Pascucci, J., Conti, F., & Elger, G. (2019, July). Improved sinterability of particles to substrates by surface modifications on substrate metallization. In Additional Conferences (Device Packaging, HiTEC, HiTEN, & CICMT) (Vol. 2019, No. HiTen, pp. 000066-000070). International Microelectronics Assembly and Packaging Society.

  • Signorini, R., Conti, F., Brugnolotto, E., Pedron, D., Liu, E., Bhogaraju, S. K., & Elger, G. (2019, April). Thermomechanical local stress in assembled GaN LEDs investigated by Raman optical spectroscopy. In Integrated Optics: Design, Devices, Systems, and Applications V (Vol. 11031, p. 110310I). International Society for Optics and Photonics.

  • Liu, E., Conti, F., Signorini, R., Brugnolotto, E., Bhogaraju, S. K., & Elger, G. (2019, March). Modelling thermo-mechanical stress in GaN-LEDs soldered on copper substrate with simulations validated by Raman experiments. In 2019 20th International Conference on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems (EuroSimE) (pp. 1-8). IEEE.

  • Hanss, A., Liu, E., Abdullah, M. R., & Elger, G. (2019, March). Failure Identification in LED packages by Transient Thermal Analysis and Calibrated FE Models. In 2019 20th International Conference on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems (EuroSimE) (pp. 1-7). IEEE.

  • Brugnolotto, E., Bhogaraju, S. K., Liu, E., Conti, F., Pedron, D., Signorini, R., & Elger, G. (2019, September). Investigation of Thermomechanical Local Stress Induced in Assembled GaN LEDs. In 2019 25th International Workshop on Thermal Investigations of ICs and Systems (THERMINIC) (pp. 1-6). IEEE.

  • Schmid, M., Krishna, B. S., & Elger, G. (2019, May). Automatic Transient Thermal Impedance Tester for Quality Inspection of Soldered and Sintered Power Electronic Devices on Panel and Tile Level. In 2019 IEEE 69th Electronic Components and Technology Conference (ECTC) (pp. 2324-2330). IEEE.

  • Schmid, M., Hanss, A., Bhogaraju, S. K., & Elger, G. (2019, September). Time Saving Averaging Algorithm for Transient Thermal Analyses over Deterministic Pulse Superposition. In 2019 25th International Workshop on Thermal Investigations of ICs and Systems (THERMINIC) (pp. 1-6). IEEE.

2018:

  • Maximilian, S., & Elger, G. (2018, September). Measurement of the Transient Thermal Impedance of MOSFETs Over the Sensitivity of the Threshold Voltage. In 2018 20th European Conference on Power Electronics and Applications (EPE'18 ECCE Europe) (pp. P-1). IEEE.

  • Hanss, A., Schmid, M., & Elger, G. (2018, December). Combined Accelerated Stress Test with In-Situ Thermal Impedance Monitoring to Access LED Reliability. In 2018 20th International Conference on Electronic Materials and Packaging (EMAP) (pp. 1-4). IEEE.

  • Schmid, M., Bhogaraju, S. K. & Elger, G. (2018, October). Qualitäts- und Zuverlässigkeitsanalyse von Sinter- und Lot-Verbindungen. In 2018 IMPAS Deutschland Herbsttagung, 18.-19. Oktober, Munich, Germany.

  • Elger, G., Bhogaraju, S. K. & Schmid, M. (2018, October). New automatic transient thermal analysis equipment to inspect the quality of sintered interconnects. In 2018 Semicon Europe, 12.-14. October, Munich, Germany.

  • Signorini, R., Pedron, D., Conti, F., Hanss, A., Bhogaraju, S. K., & Elger, G. (2018, September). Thermomechanical Stress in GaN LED Soldered on Copper Substrate Evaluated by Raman Measurements and Computer Modelling. In 2018 24rd International Workshop on Thermal Investigations of ICs and Systems (THERMINIC) (pp. 1-6). IEEE.

  • Elger, G., Hanss, A., & Schmid, M. (2018, September). Transient Thermal Analysis as In-Situ Method in Accelerated Stress Tests to Access Package Integrity of LEDs. In 2018 24rd International Workshop on Thermal Investigations of ICs and Systems (THERMINIC) (pp. 1-6). IEEE.

  • Maximilian, S., & Elger, G. (2018, September). Measurement of the Transient Thermal Impedance of MOSFETs Over the Sensitivity of the Threshold Voltage. In 2018 20th European Conference on Power Electronics and Applications (EPE'18 ECCE Europe) (pp. P-1). IEEE.

  • Bhogaraju, S. K., Hanß, A., Schmid, M., Elger, G., & Conti, F. (2018, September). Evaluation of silver and copper sintering of first level interconnects for high power LEDs. In 2018 7th Electronic System-Integration Technology Conference (ESTC) (pp. 1-8). IEEE.

  • Hanss, A., Schmid, M., Bhogaraju, S. K., Conti, F., & Elger, G. (2018, May). Reliability of sintered and soldered high power chip size packages and flip chip LEDs. In 2018 IEEE 68th Electronic Components and Technology Conference (ECTC) (pp. 2080-2088). IEEE.

  • G. Elger, M. Biberger, M. Meier, H. Schweigart, K. Schneider, H. Erdogan, Technische Sauberkeit von Radarbaugruppen, Elektronische Baugruppen und Leiterplatten EBL, 2018, Fellbach, Germany.

  • Hanss, A., Schmid, M., Bhogaraju, S. K., Conti, F., & Elger, G. (2018, May). Reliability of sintered and soldered high power chip size packages and flip chip LEDs. In 2018 IEEE 68th Electronic Components and Technology Conference (ECTC) (pp. 2080-2088). IEEE.

  • Hanss, A., Schmid, M., Bhogaraju, S. K., Conti, F., & Elger, G. (2018, April). Process development and reliability of sintered high power chip size packages and flip chip LEDs. In 2018 International Conference on Electronics Packaging and iMAPS All Asia Conference (ICEP-IAAC) (pp. 479-484). IEEE.

  • Hanss, A., & Elger, G. (2018). Residual free solder process for fluxless solder pastes. Soldering & Surface Mount Technology.

2017:

  • Elger, G. (2017, November). Chip Scale Package LED Modules: Reliability and Thermal Management. In 2017 IEEE Solid Stat Lighting China, 1.-3. November, Bejing, China.

  • Schmid, M., Hanß, A. & Elger, G. (2017, November). Analysis of the Quality of Sinter Interfaces of LEDs with New Transient Thermal Analysis Test Equipment. In 2017 IEEE Solid State Lighting China, 1.-3. November, Bejing, China.

  • Saparia, S., Tandon, S., Liu, E., Zahner, T., Besold, S., Kalb, W., & Elger, G. (2017, September). Calibration of transient FE simulation: Improvement of post-processing and simulation automation. In 2017 23rd International Workshop on Thermal Investigations of ICs and Systems (THERMINIC) (pp. 1-6). IEEE.

  • Schmid, M., Hanß, A. & Elger, G. (2017, September). Qualitätskontrolle von Sinterverbindungen mit Hilfe der transienten thermischen Analyse. In 2017 IMPAS Herbsttagung, 19.-20. September.

  • Hanß, A. & Elger, G. (2017, September). Residual Free Solder Processes for Fluxless Solder Pastes. In 2017 21th European Microelectronic and Packaging Conference, 13.-16. September, Warsaw, Poland.

  • Tandon, S., Liu, E., Zahner, T., Besold, S., Kalb, W., & Elger, G. (2017, April). Transient thermal simulation of high power LED and its challenges. In 2017 18th International Conference on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems (EuroSimE) (pp. 1-8). IEEE.

  • Schmid, M., Pforr, J., & Elger, G. (2017, May). Power Electronic Package for Double Sided Cooling Utilizing Tile-Level Assembly. In PCIM Europe 2017; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (pp. 1-7). VDE.

  • Hanss, A., Liu, E., Schmid, M., Müller, D., Karbowski, U., Derix, R., & Elger, G. (2017, May). New Method to Separate Failure Modes by Transient Thermal Analysis of High Power LEDs. In 2017 IEEE 67th Electronic Components and Technology Conference (ECTC) (pp. 1136-1144). IEEE.

  • Elger, G. & Schmid, M. (2017, February). Power Electronic Package for Double Sided Cooling. In 2017 12th European Advanced Technology Workshop on Micropackaging and Thermal Management, 1.-2. February, La Rochelle, France.

  • G. Elger, M. Schmid, A. Hanß, D. Müller, Automatic Panel Level Transient Thermal Tester, in Proc. of the 7. LED Professional Symposium, Bregenz, Austria (Ed.: S. Luger) 2017, 594–602

  • Liu, E., Zahner, T., Besold, S., Wunderle, B., & Elger, G. (2017). Location resolved transient thermal analysis to investigate crack growth in solder joints. Microelectronics Reliability, 79, 533-546.

2016:

  • E Liu, Z. Ma, A. Hanss, L. Zhao, G. Elger, Practical international standard for transient thermal resistance measurements for LEDs, Solid State Lighting China, 2016, Beijing, China.

  • Hanß, A., Hutter, M., Trodler, J. & Elger, G. (2016, October). SMD Löten mit flussmittelfreier SnAgCu Lötpaste. In 2016 IMAPS Herbsttagung, 20.-21. October, Munich, Germany.

  • Liu, E., Ankit, B. R., & Gordon, E. (2016, August). Assessment of assembly quality of Chip scale Package LEDs on insulated metal substrate. In 2016 17th International Conference on Electronic Packaging Technology (ICEPT) (pp. 119-124). IEEE.

  • Hanß, A., Schmid, M., & Elger, G. (2016, September). Self alignment of flip chip LEDs on PCB for high position accuracy. In 2016 6th Electronic System-Integration Technology Conference (ESTC) (pp. 1-6). IEEE.

  • Hanss, A., Hutter, M., Trodler, J., & Elger, G. (2016, May). Solder process for fluxless solder paste applications. In 2016 IEEE 66th Electronic Components and Technology Conference (ECTC) (pp. 447-454). IEEE.

  • G. Elger, A. Hanss, M. Schmid, E Liu, U. Karbowski, R. Derix, Reliability Monitoring of Miniaturized LED Light Sources , Smart System Integration, München, 2016, 130-137.

  • Hanss, A., Hutter, M., Trodler, J., & Elger, G. (2016, May). Solder process for fluxless solder paste applications. In 2016 IEEE 66th Electronic Components and Technology Conference (ECTC) (pp. 447-454). IEEE.

  • G. Elger, D. Müller, A. Hanß, M. Schmid, E Liu, U. Karbowski, R. Derix, Transient Thermal Analysis for Accelerated Reliability Testing of LEDs, in Proc. of the 27. European Symposium on Reliability of Electron Devices, Failure Physics and Analysis, Halle (Saale), Deutschland (Ed.: ECPE) 2016

2015:

  • Zuverlässigkeitsuntersuchungen von LED-Modulen mit Hilfe der Transienten Thermischen Analyse, 4. VDI-Konferenz Lebensdauer und Zuverlässigkeit in der LED-Beleuchtung 10. und 11. Juni 2015 in Düsseldorf

  • Liu, E., Hanss, A., Schmid, M., & Elger, G. (2015). The influence of phosphor layer and sidecoating on the thermal performance and the structure function of modern waver level high power LEDs. In 2015 21st International Workshop on Thermal Investigations of ICs and Systems (THERMINIC) (pp. 1-4). IEEE.

  • Hanss, A., Liu, E., Schmid, M., & Elger, G. (2015). The influence of voids in solder joints on thermal performance and reliability investigated with transient thermal analysis. In 2015 21st International Workshop on Thermal Investigations of ICs and Systems (THERMINIC) (pp. 1-6). IEEE.

  • Elger, G., Schmid, M., Hanß, A., Liu, E., Klein, M. J., Karbowski, U., & Derix, R. (2015, May). Analysis of new direct on PCB board attached high power flip-chip LEDs. In 2015 IEEE 65th Electronic Components and Technology Conference (ECTC) (pp. 1310-1317). IEEE.

  • Liu, E., Hanss, A., Schmid, M., & Elger, G. (2015). The influence of phosphor layer and sidecoating on the thermal performance and the structure function of modern waver level high power LEDs. In 2015 21st International Workshop on Thermal Investigations of ICs and Systems (THERMINIC) (pp. 1-4). IEEE.

2014:

  • Elger, G., Hanss, A., Schmid, M., & Wipiejewski, T. (2014, November). Application of thermal analysis for the development of reliable high power LED modules. In 2014 11th China International Forum on Solid State Lighting (SSLCHINA) (pp. 158-164). IEEE.

  • Elger, G., Hutter, M., Rauschenbach, S., & Willwohl, H. (2014, May). Performance of improved SAC solders under high thermo-mechanical stress condition. In Proceedings of IEEE Electronics Circuits World Convention (ECWC13).

  • Kandaswamy, S. V., Tetzlaff, U., Derix, R., & Elger, G. (2014, October). Analysis of crack length and crack position in the Solder Joints of High Power LEDs by Transient Thermal Measurements and Finite Element Simulations. In International Symposium on Microelectronics (Vol. 2014, No. 1, pp. 000055-000061). International Microelectronics Assembly and Packaging Society.

  • Elger, G., Kandaswamy, S. V., Derix, R., & Conti, F. (2014, September). Detection of solder joint cracking of high power leds on AI-IMS during temperature shock test by transient thermal analysis. In 20th International Workshop on Thermal Investigations of ICs and Systems (pp. 1-6). IEEE.

  • Elger, G., Kandaswamy, S. V., von Kouwen, M., Derix, R., & Conti, F. (2014, May). In-Situ measurements of the relative thermal resistance: Highly sensitive method to detect crack propagation in solder joints. In 2014 IEEE 64th Electronic Components and Technology Conference (ECTC) (pp. 1464-1470). IEEE.

2013:

  • Elger, G., Spinger, B., Bienen, N., & Benter, N. (2013, May). LED matrix light source for adaptive driving beam applications. In 2013 IEEE 63rd Electronic Components and Technology Conference (pp. 535-540). IEEE.

  • Elger, G., Kandaswamy, S. V., Derix, R., & Wilde, J. (2013, January). Transient Thermal Analysis as a Test Method for the Reliability Investigation of High Power LEDs during Temperature Cycle Tests. In International Symposium on Microelectronics (Vol. 2013, No. 1, pp. 000902-000907). International Microelectronics Assembly and Packaging Society.

  • Transiente Thermische Analyse als Messmethode für die Zuverlässigkeit von High Power LEDs, Deutsche IMAPS-Konferenz, 17-18.10.2013.

  • LED Packaging – Gegenwart und Zukunft, Tutorial, SMT Hybrid Packaging, Internationale Fachmesse und Kongress für Systemintegration in der Mikroelektronik, Nürnberg, 16.- 18.04.2013

2012:

  • Zhao, X. J., Caers, J. F., Noijen, S., Zhong, Y., De Jong, M., Gijsbers, H., Elger, G. & Willwohl, H. (2012, September). Potential Interconnect Technologies for High Power LEDs Assemblies. In 2012 IEEE Electronic System Technology Conference, 17.-20. September, Amsterdam, Netherland.
  • Elger, G., Willwohl, H. & Schug, J. (2012, September). Thermal Analysis of High Power LED Subassemblies for Automotive Front Light Application. In 2012 IEEE Electronic System Technology Conference, 17.-20. September, Amsterdam, Netherland.
  • Elger, G., Spinger, B., Peters, R., Benter, N., Willwohl, H., Honma, S., Bohnenkamp, U., Stolarski, A., Sikkens, M., Emmerich, A., Gijsbers, H. & Lesch, N. (2012, May/June). High Power LED Subassemblies for Automotive Front Light Application. In 2012 IEEE Electronic Components Technology Conference, 30. May - 1. June, San Diego, USA.

2011:

  • Elger, G., Lauterbach, R., Feder, R., Dankwart, K. & Zilkens, C. (2011, May/June). Inline Thermal Transient Testing of High Power LED Modules for Solder Joint Quality Control. In 2011 IEEE Electronic System Technology Conference, 31. May - 3. June, Lake Buena Vista, USA.

2010:

  • Schmid, M., Bhogaraju, S. K., Riedel, A. & Elger, G. (2010, September). Development of an In-Line Capable Transient Thermal Analysis Equipment for a Power Module with Five Half Bridges. In 2020 26th International Workshop on Thermal Investigations of ICs and Systems (THERMINIC) (pp. 1-6). IEEE
  • Elger, G., Lauterbach, R., Feder, R., Dankwart, K. & Zilkens, C. (2010, September). High Yield Thermode Bond Process Under Activated Atmosphere and Inline Thermal Interface Measurement for High Power Optoelectronic Devices. In 2010 IEEE Electronic System Technology Conference, 13.-16. September, Berlin, Germany.

Abschlussarbeiten und Doktorarbeiten

Dissertationen:

  • Alexander Hanß, 2019: Zuverlässigkeitsuntersuchung von LED-Interconnects mit Hilfe der Transienten Thermischen Analyse
  • Kleiner, Jan, 2021: Experimental investigation and modeling of the thermal behavior of intelligent battery cells and modules under electric vehicle conditions Dissertation Kumulativ, 10.14279/depositonce-12539

  • Schmid, Maximilian, 2022:  Weiterentwicklung der transienten thermischen Analysen für Leistungs-Halbleiter Dissertation (10.14279/depositonce-17406)

Masterarbeiten:

  • Amit Pandey, 2020: Analysis of Thermo-Mechanically Induced Change in Sharpness of an Automotive Optic Module by FE Simulation
  • Dominik Müller, 2017: Aufbau eines Prüfstandes zur Messung der thermischen Impedanz von Leistungshalbleitern
  • Maximilian Schmid, 2016: Entwicklung einer LED-Matrix mit neuartigen Flip-Chip-LEDs für ein adaptives Fernlicht

Bachelorarbeiten:

  • Philip Andrew Hausmann, 2020: Blind Deconvolution zur Bestimmung der Schärfe des Optik Moduls im Feld
  • Rico Kersting, 2016: Realisierung einer Schaltung zur Messung der Kennlinie von LEDs während beschleunigter Alterungstests

 

Offene Stellen

Falls Sie Interesse an offenen Stellen für Studentische Arbeiten innerhalb der Forschungsgruppe haben, senden Sie bitte eine Mail mit Lebenslauf an assistenz-iimo-elger@thi.de.