Fraunhofer-Gesellschaft

Publica

Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.
2019Adaptive low-temperature covalent bonding of III-nitride thin films by extremely thin water interlayers
Gerrer, Thomas; Graff, Andreas; Simon-Najasek, Michél; Czap, Heiko; Maier, Thomas; Benkhelifa, Fouad; Müller, Stefan; Nebel, Christoph E.; Waltereit, Patrick; Quay, Rüdiger; Cimalla, Volker
Journal Article
2019A GaN-on-Si-based logic, driver and DC-DC converter circuit with closed-loop peak current-mode control
Basler, Michael; Mönch, Stefan; Reiner, Richard; Waltereit, Patrick; Quay, Rüdiger; Kallfass, Ingmar; Ambacher, Oliver
Conference Paper
2019Integrated current sensing in GaN power ICs
Mönch, Stefan; Reiner, Richard; Waltereit, Patrick; Quay, Rüdiger; Ambacher, Oliver; Kallfass, Ingmar
Conference Paper
2019Investigation of growth parameters for ScAlN-barrier HEMT structures by plasma-assisted MBE
Frei, Kathrin; Trejo-Hernández, Raúl; Schütt, Sebastian; Kirste, Lutz; Prescher, Mario; Aidam, Rolf; Müller, Stefan; Waltereit, Patrick; Ambacher, Oliver; Fiederle, Michael
Journal Article, Conference Paper
2019MBE of III-Nitride Semiconductors for Electronic Devices
Aidam, Rolf; Ambacher, Oliver; Diwo, Elke; Godejohann, Birte-Julia; Kirste, Lutz; Lim, T.; Quay, Rüdiger; Waltereit, Patrick
Book Article
2018Flexible and Scalable Heterogeneous Integration of GaN HEMTs on Si‐CMOS by Micro‐Transfer‐Printing
Lerner, R.; Eisenbrandt, S.; Fischer, F.; Fecioru, A.; Trindade, A.J.; Bonafede, S.; Bower, C.; Waltereit, P.; Reiner, R.; Czap, H.
Journal Article
2018Halbleiterbauelement und Verfahren zu dessen Herstellung
Köhler, Klaus; Waltereit, Patrick
Patent
2018A homogeneous and reproducible large-area, low dispersion GaN-on-Si normally-off 600 V transistor technology using selective GaN etching
Waltereit, P.; Preschle, M.; Müller, S.; Kirste, L.; Czap, H.; Ruster, J.; Dammann, M.; Reiner, R.
Conference Paper
2018Instabilities by parasitic substrate-loop of GaN-on-Si HEMTs in half-bridges
Mönch, Stefan; Weiss, Beatrix; Reiner, Richard; Waltereit, Patrick; Quay, Rüdiger; Ambacher, Oliver; Kallfass, Ingmar
Conference Paper
2018Monolithic GaN power circuits for highly-efficient, fast-switching converter applications with higher functionality
Waltereit, Patrick; Reiner, Richard; Weiss, Beatrix; Mönch, Stefan; Müller, Stefan; Czap, Heiko; Wespel, Matthias; Dammann, Michael; Kirste, Lutz; Quay, Rüdiger
Conference Paper
2018Monolithically integrated power circuits in high-voltage GaN-on-Si heterojunction technology
Reiner, Richard; Waltereit, Patrick; Weiss, Beatrix; Mönch, Stefan; Wespel, Matthias; Müller, Stefan; Quay, Rüdiger; Ambacher, Oliver
Journal Article
2018Multi-stage cascode in high-voltage AlGaN/GaN-on-Si technology
Reiner, Richard; Waltereit, Patrick; Mönch, Stefan; Dammann, Michael; Weiss, Beatrix; Quay, Rüdiger; Ambacher, Oliver
Conference Paper
2018PCB-embedding for GaN-on-Si power devices and ICs
Reiner, Richard; Weiss, Beatrix; Meder, Dirk; Waltereit, Patrick; Vockenberger, C.; Gerrer, Thomas; Quay, Rüdiger; Ambacher, Oliver
Conference Paper
2018Transfer of AlGaN/GaN RF-devices onto diamond substrates via van der Waals bonding
Gerrer, Thomas; Cimalla, Volker; Waltereit, Patrick; Müller, Stefan; Benkhelifa, Fouad; Maier, Thomas; Czap, Heiko; Ambacher, Oliver; Quay, Rüdiger
Journal Article, Conference Paper
2017Effect of substrate termination on switching loss and switching time using 600 V GaN-on-Si HEMTs with integrated gate driver in half-bridges
Mönch, Stefan; Reiner, Richard; Weiss, Beatrix; Waltereit, Patrick; Quay, Rüdiger; Ambacher, Oliver; Kallfass, Ingmar
Conference Paper
2017Hetero-integrated GaN MMICs: Hot Islands in a (Silicon) Ocean...
Quay, Rüdiger; Brueckner, Peter; Tessmann, Axel; Ture, Erdin; Schwantuschke, Dirk; Dammann, Michael; Waltereit, Patrick
Conference Paper
2017Investigation of GaN-HEMTs in reverse conduction
Reiner, Richard; Waltereit, Patrick; Weiss, Beatrix; Quay, Rüdiger; Ambacher, Oliver
Conference Paper
2017Monolithically integrated GaN-on-Si power circuits
Reiner, Richard; Waltereit, Patrick; Weiss, Beatrix; Mönch, Stefan; Quay, Rüdiger; Ambacher, Oliver
Conference Paper
2017Operation of PCB-embedded, high-voltage multilevel-converter GaN-IC
Weiss, Beatrix; Reiner, Richard; Waltereit, Patrick; Quay, Rüdiger; Ambacher, Oliver
Conference Paper
2017Pulse robustness of AlGaN/GaN HEMTs with Schottky- and MIS-gates
Unger, Christian; Mocanu, Mariana; Pfost, Martin; Waltereit, Patrick; Reiner, Richard
Conference Paper
2017Radiation aspects and performance of GaN power converters and RFICs for airborne and space applications
Quay, Rüdiger; Brueckner, Peter; Reiner, Richard; Schwantuschke, Dirk; Waltereit, Patrick
Conference Paper
2017Substrate biasing effects in a high-voltage, monolithically-integrated half-bridge GaN-chip
Weiss, Beatrix; Reiner, Richard; Polyakov, Vladimir M.; Waltereit, Patrick; Quay, Rüdiger; Ambacher, Oliver; Maksimovic, Dragan
Conference Paper
2017Thermal stability and failure mechanism of schottky gate AlGaN/GaN HEMTs
Mocanu, Manuela; Unger, Christian; Pfost, Martin; Waltereit, Patrick; Reiner, Richard
Journal Article
2017Transfer of AlGaN/GaN RF-devices onto diamond substrates via van der Waals bonding
Gerrer, Thomas; Cimalla, Volker; Waltereit, Patrick; Müller, Stefan; Benkhelifa, Fouad; Maier, Thomas; Czap, Heiko; Nebel, Christoph E.; Quay, Rüdiger
Conference Paper
2016Analysis and modeling of GaN-based multi field plate Schottky power diodes
Weiss, B.; Reiner, R.; Waltereit, P.; Quay, R.; Ambacher, O.
Conference Paper
2016Experimental analysis of the gate-leakage-induced failure mechanism in GaN HEMTs
Unger, C.; Mocanu, M.; Pfost, M.; Waltereit, P.; Reiner, R.
Conference Paper
2016A GaN-based 10.1MHz class-F-1 300 W continuous wave amplifier targeting industrial power applications
Maier, F.; Krausse, D.; Gruner, D.; Reiner, R.; Waltereit, P.; Quay, R.; Ambacher, O.
Conference Paper
2016Heterogeneous integration of microscale gallium nitride transistors by micro-transfer-printing
Lerner, R.; Eisenbrandt, S.; Bonafede, S.; Meitl, M.A.; Fecioru, A.; Trindade, A.J.; Reiner, R.; Waltereit, P.; Bower, C.
Conference Paper
2016High voltage GaN-based Schottky diodes in non-isolated LED buck converters
Zibold, A.; Reiner, R.; Weiss, B.; Kunzer, M.; Quay, R.; Wagner, J.; Waltereit, P.; Ambacher, O.
Conference Paper
2016Integration of GaN HEMTs onto silicon CMOS by micro transfer printing
Lerner, R.; Eisenbrandt, S.; Bower, C.; Bonafede, S.; Fecioru, A.; Reiner, R.; Waltereit, P.
Conference Paper
2016LED-retrofit based on AlGaN/GaN-on-Si field-effect transistor drivers
Zibold, A.; Kunzer, M.; Reiner, R.; Weiss, B.; Waltereit, P.; Quay, R.; Wagner, J.; Ambacher, O.
Conference Paper
2016Linear temperature sensors in high-voltage GaN-HEMT power devices
Reiner, Richard; Waltereit, Patrick; Weiss, Beatrix; Wespel, M.; Meder, Dirk; Mikulla, Michael; Quay, Rüdiger; Ambacher, O.
Conference Paper
2016Monolithic GaN-on-Si half-bridge circuit with integrated freewheeling diodes
Reiner, R.; Waltereit, P.; Weiss, B.; Wespel, M.; Mikulla, M.; Quay, R.; Ambacher, O.
Conference Paper
2016Monolithically-integrated power circuits in high-voltage GaN-on-Si heterojunction technology
Reiner, R.; Waltereit, P.; Weiss, B.; Mönch, S.; Wespel, M.; Müller, S.; Quay, R.; Ambacher, O.
Conference Paper
2016Single-input GaN gate driver based on depletion-mode logic integrated with a 600 V GaN-on-Si power transistor
Mönch, S.; Kallfass, I.; Reiner, R.; Weiss, B.; Waltereit, P.; Quay, R.; Ambacher, O.
Conference Paper
2016Slew rate control of a 600 V 55 mΩ GaN cascode
Endruschat, A.; Heckel, T.; Reiner, R.; Waltereit, P.; Quay, R.; Ambacher, O.; März, M.; Eckardt, B.; Frey, L.
Conference Paper
2016Soft-switching 3 MHz converter based on monolithically integrated half-bridge GaN-chip
Weiss, B.; Reiner, R.; Waltereit, P.; Quay, R.; Ambacher, O.; Sepahvand, A.; Maksimovic, D.
Conference Paper
2016Trapping effects at the drain edge in 600 V GaN-on-Si HEMTs
Wespel, M.; Polyakov, V.M.; Dammann, M.; Reiner, R.; Waltereit, P.; Quay, R.; Mikulla, M.; Ambacher, O.
Journal Article
2015High-voltage stress time-dependent dispersion effects in AlGaN/GaN HEMTs
Wespel, M.; Dammann, M.; Polyakov, V.; Reiner, R.; Waltereit, P.; Weiss, B.; Quay, R.; Mikulla, M.; Ambacher, O.
Conference Paper
2015Integrated reverse-diodes for GaN-HEMT structures
Reiner, R.; Waltereit, P.; Weiss, B.; Wespel, M.; Quay, R.; Schlechtweg, M.; Mikulla, M.; Ambacher, O.
Conference Paper
2015Monolithic integrated quasi-normally-off gate driver and 600 V GaN-on-Si HEMT
Mönch, S.; Costa, M.; Barner, A.; Kallfass, I.; Reiner, R.; Weiss, B.; Waltereit, P.; Quay, R.; Ambacher, O.
Conference Paper
2015Monolithically-integrated mulitlevel inverter on lateral GaN-on-Si technology for high-voltage applications
Weiss, B.; Reiner, R.; Waltereit, P.; Müller, S.; Wespel, M.; Quay, R.; Ambacher, O.
Conference Paper
2015A novel broadband high-power source-pull/load-pull concept for the HF- to UHF-range
Maier, F.; Grede, A.; Gruner, D.; Quay, R.; Waltereit, P.; Ambacher, O.
Conference Paper
2015A novel broadband high-power source-pull/load-pull concept for the HF-to UHF-range
Maier, F.A.; Grede, A.; Gruner, D.; Quay, R.; Waltereit, P.; Ambacher, O.
Conference Paper
2015Quasi-normally-off GaN gate driver for high slew-rate d-mode GaN-on-Si HEMTs
Mönch, S.; Costa, M.; Barner, A.; Kallfass, I.; Reiner, R.; Weiss, B.; Waltereit, P.; Quay, R.; Ambacher, O.
Conference Paper
2015Switching frequency modulation for GaN-based power converters
Weiss, B.; Reiner, R.; Quay, R.; Waltereit, P.; Mikulla, M.; Schlechtweg, M.; Ambacher, O.
Conference Paper
2015With electroluminescence microcopy towards more reliable AlGaN/GaN transistors
Baeumler, M.; Dammann, M.; Wespel, M.; George, R.; Konstanzer, H.; Maroldt, S.; Polyakov, V.M.; Müller, S.; Bronner, W.; Brueckner, P.; Benkhelifa, F.; Waltereit, P.; Quay, R.; Mikulla, M.; Wagner, J.; Ambacher, O.; Graff, A.; Altmann, F.; Simon-Najasek, M.; Lorenzini, M.; Fagerlind, M.; Wel, P. van der; Roedle, T.
Conference Paper
2014Assembly and packaging technologies for high-temperature and high-power GaN HEMTs
Bajwa, A.A.; Qin, Y.; Wilde, J.; Reiner, R.; Waltereit, P.; Quay, R.
Conference Paper
2014Characterization of AlGaN/GaN-on-Si HFETs in high-power converter applications
Weiss, B.; Reiner, R.; Quay, R.; Waltereit, P.; Müller, S.; Benkhelifa, F.; Mikulla, M.; Schlechtweg, M.; Ambacher, O.
Conference Paper
2014Electroluminescence investigation of the lateral field distribution in AlGaN/GaN HEMTs for power applications
Baeumler, M.; Polyakov, V.M.; Gütle, F.; Dammann, M.; Benkhelifa, F.; Waltereit, P.; Reiner, R.; Müller, S.; Wespel, M.; Quay, R.; Mikulla, M.; Wagner, J.; Ambacher, O.
Journal Article
2014Evaluation of local SiN(x)/GaN interface trap-density fluctuations in AlGaN/GaN HEMTs by electroluminescence microscopy
Baeumler, M.; Polyakov, V.; Wespel, M.; Dammann, M.; Anto, R.; Waltereit, P.; Reiner, R.; Müller, S.; Quay, R.; Mikulla, M.; Wagner, J.; Ambacher, O.
Conference Paper
2014Influence of surface states on the voltage robustness of AlGaN/GaN HFET power devices
Wespel, M.; Dammann, M.; Baeumler, M.; Polyakov, V.M.; Reiner, R.; Waltereit, P.; Quay, R.; Mikulla, M.; Ambacher, O.
Conference Paper
2014Influence of surface states on the voltage robustness of AlGaN/GaN HFET power devices
Wespel, M.; Baeumler, M.; Polyakov, V.; Dammann, M.; Reiner, R.; Waltereit, P.; Quay, R.; Mikulla, M.; Ambacher, O.
Journal Article
2014Large-area GaN-on-Si HFET power devices for highly-efficient, fast-switching converter applications
Waltereit, P.; Reiner, R.; Wespel, M.; Weiss, B.; Czap, H.; Dammann, M.; Müller, S.; Quay, R.; Mikulla, M.; Ambacher, O.
Conference Paper
2014A new approach for GaN normally-off power transistors: Lateral recess for positive threshold voltage
Waltereit, P.; Leuther, A.; Rüster, J.; Czap, H.; Preschle, M.; Iannucci, R.; Müller, S.; Mikulla, M.; Ambacher, O.
Conference Paper
2014Novel layout and packaging for lateral, low-resistance GaN-on-Si power transistors
Reiner, R.; Waltereit, P.; Benkhelifa, F.; Walcher, H.; Quay, R.; Schlechtweg, M.; Ambacher, O.
Conference Paper
2014The sky's the limit
Emrick, R.; Cruz, P.; Carvalho, N.B.; Gao, S.; Quay, R.; Waltereit, P.
Journal Article
2013(In)AlGaN heterojunction field effect transistors and circuits for high-power applications at microwave and millimeter-wave frequencies
Maroldt, S.; Quay, R.; Dennler, P.; Schwantuschke, D.; Musser, M.; Dammann, M.; Aidam, R.; Waltereit, P.; Tessmann, A.; Ambacher, O.
Journal Article
2013Application of GaN FET in 1MHz large signal bandwidth power supply for radio frequency power amplifier
Cucak, D.; Vasic, M.; Garcia, O.; Oliver, J.; Alou, P.; Cobos, J.A.; Tadjer, M.; Calle, F.; Benkhelifa, F.; Reiner, R.; Waltereit, P.; Müller, S.
Conference Paper
2013Benchmarking of large-area GaN-on-Si HFET power devices for highly-efficient, fast-switching converter applications
Reiner, R.; Waltereit, P.; Benkhelifa, F.; Müller, S.; Wespel, M.; Quay, R.; Schlechtweg, M.; Mikulla, M.; Ambacher, O.
Conference Paper
2013Development of an epitaxial growth process on European SiC substrates for a low leakage GaN HEMT technology with power added efficiencies around 65%
Waltereit, P.; Müller, S.; Kirste, L.; Prescher, M.; Storm, S.; Weber, A.; Schauwecker, B.; Hosch, M.; Splettstößer, J.
Conference Paper
2013Effiziente Energiewandlung mit GaN-basierter Leistungselektronik
Waltereit, P.; Reiner, R.; Müller, S.; Czap, H.; Mikulla, M.; Ambacher, O.
Conference Paper
2013GaN HEMTs and MMICs for space applications
Waltereit, P.; Bronner, W.; Quay, R.; Dammann, M.; Cäsar, M.; Müller, S.; Reiner, R.; Brueckner, P.; Kiefer, R.; Raay, F. van; Kühn, J.; Musser, M.; Haupt, C.; Mikulla, M.; Ambacher, O.
Journal Article
2013GaN-based high voltage transistors for efficient power switching
Waltereit, P.; Reiner, R.; Czap, H.; Peschel, D.; Müller, S.; Quay, R.; Mikulla, M.; Ambacher, O.
Journal Article, Conference Paper
2013Recent developments in GaN HEMTs and MMICs for high power electronics
Waltereit, P.; Bronner, W.; Brueckner, P.; Dammann, M.; Reiner, R.; Müller, S.; Kühn, J.; Musser, M.; Quay, R.; Mikulla, M.; Ambacher, O.
Conference Paper
2013Recent developments of gallium nitride monolithically-microwave integrated circuits for space
Quay, R.; Waltereit, P.
Conference Paper
2013Submicron-AlGaN/GaN MMICs for space applications
Quay, R.; Waltereit, P.; Kühn, J.; Brueckner, P.; Heijningen, M. van; Jukkala, P.; Hirche, K.; Ambacher, O.
Conference Paper
2012Fractal structures for low-resistance large area AlGaN/GaN power transistors
Reiner, R.; Waltereit, P.; Benkhelifa, F.; Müller, S.; Walcher, H.; Wagner, S.; Quay, R.; Schlechtweg, M.; Ambacher, O.
Conference Paper
2012GaN-based high-frequency devices and circuits: A Fraunhofer perspective
Waltereit, P.; Bronner, W.; Quay, R.; Dammann, M.; Cäsar, M.; Müller, S.; Raay, F. van; Kiefer, R.; Brueckner, P.; Kühn, J.; Musser, M.; Kirste, L.; Haupt, C.; Pletschen, W.; Lim, T.; Aidam, R.; Mikulla, M.; Ambacher, O.
Journal Article
2012Generation of traps in AlGaN/GaN HEMTs during RF-and DC-stress test
Cäsar, M.; Dammann, M.; Polyakov, V.M.; Waltereit, P.; Bronner, W.; Baeumler, M.; Quay, R.; Mikulla, M.; Ambacher, O.
Conference Paper
2012High efficiency X-band AlGaN/GaN MMICs for space applications with lifetimes above 10(5) hours
Waltereit, P.; Kühn, J.; Quay, R.; Raay, F. van; Dammann, M.; Cäsar, M.; Müller, S.; Mikulla, M.; Ambacher, O.; Lätti, J.; Rostewitz, M.; Hirche, K.; Däubler, J.
Conference Paper
2012High efficiency X-band AlGaN/GaN MMICs for space applications with lifetimes above 105 hours
Waltereit, P.; Kuhn, J.; Quay, R.; Raay, F. van; Dammann, M.; Casar, M.; Muller, S.; Mikulla, M.; Ambacher, O.; Latti, J.; Rostewitz, M.; Hirche, K.; Daubler, J.
Conference Paper
2012Influence of AlGaN barrier thickness on electrical and device properties in Al0.14Ga0.86N/GaN high electron mobility transistor structures
Waltereit, P.; Bronner, W.; Musser, M.; Raay, F. van; Dammann, M.; Cäsar, M.; Müller, S.; Kirste, L.; Köhler, K.; Quay, R.; Mikulla, M.; Ambacher, O.
Journal Article
2012Is GaN the ideal material for space?
Waltereit, P.; Bronner, W.; Quay, R.; Dammann, M.; Cäsar, M.; Müller, S.; Reiner, R.; Brueckner, P.; Kiefer, R.; Raay, F. van; Kühn, J.; Musser, M.; Haupt, C.; Mikulla, M.; Ambacher, O.
Conference Paper
2012Microscopic degradation analysis of RF-stressed AlGaN/GaN HEMTs
Gütle, F.; Baeumler, M.; Dammann, M.; Cäsar, M.; Walcher, H.; Waltereit, P.; Bronner, W.; Müller, S.; Kiefer, R.; Quay, R.; Mikulla, M.; Ambacher, O.; Graff, A.; Altmann, F.; Simon, M.
Conference Paper
2012Novel III-N devices: Progess on GaN-based DC-DC converters for space
Quay, R.; Waltereit, P.; Benkhelifa, F.; Reiner, R.; Mikulla, M.; Ambacher, O.
Conference Paper
2012Reverse bias stress test of GaN HEMTs for high-voltage switching applications
Dammann, M.; Czap, H.; Rüster, J.; Baeumler, M.; Gütle, F.; Waltereit, P.; Benkhelifa, F.; Reiner, R.; Cäsar, M.; Konstanzer, H.; Müller, S.; Quay, R.; Mikulla, M.; Ambacher, O.
Conference Paper
2012Trade-offs between performance and reliability in AlGaN/GaN transistors
Waltereit, P.; Bronner, W.; Kiefer, R.; Quay, R.; Dammann, M.; Cäsar, M.; Brueckner, P.; Müller, S.; Mikulla, M.; Ambacher, O.
Journal Article, Conference Paper
2011Comprehensive surface analysis of GaN-capped AlGaN/GaN high electron mobility transistors
Gutt, R.; Himmerlich, M.; Fenske, M.; Müller, S.; Lim, T.; Kirste, L.; Waltereit, P.; Köhler, K.; Krischok, S.; Fladung, T.
Journal Article
2011Critical factors influencing the voltage robustness of AlGaN/GaN HEMTs
Cäsar, M.; Dammann, M.; Polyakov, V.M.; Waltereit, P.; Quay, R.; Mikulla, M.; Ambacher, O.
Journal Article, Conference Paper
2011Effect of chemical surface pre-treatment on reliability of AlGaN/GaN HEMTs
Cäsar, M.; Dammann, M.; Waltereit, P.; Bronner, W.; Baeumler, M.; Quay, R.; Mikulla, M.; Ambacher, O.
Conference Paper
2011Electrical properties of AlxGa1-xN/GaN heterostructures with low Al content
Köhler, K.; Müller, S.; Waltereit, P.; Pletschen, W.; Polyakov, V.M.; Lim, T.; Kirste, L.; Menner, H.; Brueckner, P.; Ambacher, O.; Buchheim, C.; Goldhahn, R.
Journal Article
2011From epitaxy to backside process: Reproducible AlGaN/GaN HEMT technology for reliable and rugged power devices
Bronner, W.; Waltereit, P.; Müller, S.; Dammann, M.; Kiefer, R.; Dennler, P.; Raay, F. van; Musser, M.; Quay, R.; Mikulla, M.; Ambacher, O.
Conference Paper
2011InAlGaN/GaN MMICs in microstrip transmission line technology for wideband applications
Schuh, P.; Sledzik, H.; Oppermann, M.; Quay, R.; Kühn, J.; Lim, T.; Waltereit, P.; Mikulla, M.; Ambacher, O.
Conference Paper
2011Quaternary barriers for improved performance of GaN-based HEMTs
Lim, T.; Aidam, R.; Waltereit, P.; Pletschen, W.; Quay, R.; Kirste, L.; Ambacher, O.
Journal Article
2011Reliability and degradation mechanism of 0.25 µm AlGaN/GaN HEMTs under RF stress conditions
Dammann, M.; Baeumler, M.; Gütle, F.; Cäsar, M.; Walcher, H.; Waltereit, P.; Bronner, W.; Müller, S.; Kiefer, R.; Quay, R.; Mikulla, M.; Ambacher, O.; Graff, A.; Altmann, F.; Simon, M.
Conference Paper
2010AlGaN/GaN epitaxy and technology
Waltereit, P.; Bronner, W.; Quay, R.; Dammann, M.; Kiefer, R.; Pletschen, W.; Müller, S.; Aidam, R.; Menner, H.; Kirste, L.; Köhler, K.; Mikulla, M.; Ambacher, O.
Journal Article
2010Compositional variation of nearly lattice-matched InAlGaN alloys for high electron mobility transistors
Lim, T.; Aidam, Rolf; Kirste, Lutz; Waltereit, Patrick; Quay, Rüdiger; Müller, Stefan; Ambacher, O.
Journal Article
2010Critical factors influencing the voltage robustness of AlGaN/GaN HEMTs
Cäsar, M.; Dammann, M.; Polyakov, V.M.; Waltereit, P.; Quay, R.; Mikulla, M.; Ambacher, O.
Conference Paper
2010Design of near lattice-matched AlGaInN-barriers for highly-scalable GaN-based transistor structures
Lim, T.; Aidam, R.; Kirste, L.; Waltereit, P.; Müller, S.; Ambacher, O.
Journal Article, Conference Paper
2010Development of rugged 2 GHz power bars delivering more than 100 W and 60% power added efficiency
Waltereit, P.; Bronner, W.; Quay, R.; Dammann, M.; Müller, S.; Mikulla, M.; Ambacher, O.; Harm, L.; Lorenzini, M.; Rödle, T.; Riepe, K.; Bellmann, K.; Buchheim, C.; Goldhahn, R.
Journal Article, Conference Paper
2010GaN-based submicrometer HEMTs with lattice-matched InAlGaN barrier grown by MBE
Lim, T.; Aidam, R.; Waltereit, P.; Henkel, T.; Quay, R.; Lozar, R.; Maier, T.; Kirste, L.; Ambacher, O.
Journal Article
2010Harmonic termination of AlGaN/GaN/(Al)GaN single- and double-heterojunction HEMTs
Kühn, J.; Waltereit, P.; Raay, F. van; Aidam, R.; Quay, R.; Ambacher, O.; Thumm, M.
Conference Paper
2010High efficiency and low leakage AlGaN/GaN HEMTs for a robust, reproducible and reliable X-band MMIC space technology
Waltereit, P.; Bronner, W.; Kiefer, R.; Quay, R.; Kühn, J.; Raay, F. van; Dammann, M.; Müller, S.; Libal, C.; Meier, T.; Mikulla, M.; Ambacher, O.
Conference Paper
2010Impact of Al content on transport properties of two-dimensional electron gas in GaN/Al(x)Ga(1-x)N/GaN heterostructures
Polyakov, V.M.; Cimalla, V.; Lebedev, V.; Köhler, K.; Müller, S.; Waltereit, P.; Ambacher, O.
Journal Article
2010Influence of the surface potential on electrical properties of Al(x)Ga(1-x)N/GaN heterostructures with different Al-content: Effect of growth method
Köhler, K.; Müller, S.; Aidam, R.; Waltereit, P.; Pletschen, W.; Kirste, L.; Menner, H.; Bronner, W.; Leuther, A.; Quay, R.; Mikulla, M.; Ambacher, O.; Granzner, R.; Schwierz, F.; Buchheim, C.; Goldhahn, R.
Journal Article
2010Investigation of leakage current of AlGaN/GaN HEMTs under pinch-off condition by electroluminescence microscopy
Baeumler, M.; Gütle, F.; Polyakov, V.M.; Cäsar, M.; Dammann, M.; Konstanzer, H.; Pletschen, W.; Bronner, W.; Quay, R.; Waltereit, P.; Mikulla, M.; Ambacher, O.; Bourgeois, F.; Behtash, R.; Riepe, K.J.; Wel, P.J. van der; Klappe, J.; Rödle, T.
Journal Article
2010Reliability status of GaN transistors and MMICs in Europe
Dammann, M.; Cäsar, M.; Konstanzer, H.; Waltereit, P.; Quay, R.; Bronner, W.; Kiefer, R.; Müller, S.; Mikulla, M.; Wel, P.J. van der; Rödle, T.; Bourgeois, F.; Riepe, K.
Conference Paper
2010Repeatable submicron AlGaN/GaN devices and MMICs
Quay, R.; Waltereit, P.
Conference Paper
2010Reproducible and uniform growth of GaN based HEMTs on 4 inch SiC by plasma assisted molecular beam epitaxy suitable for production
Aidam, R.; Waltereit, P.; Kirste, L.; Dammann, M.; Quay, R.
Journal Article
2010Structural properties of MBE AlInN and AlGaInN barrier layers for GaN-HEMT structures
Kirste, L.; Lim, T.; Aidam, R.; Müller, S.; Waltereit, P.; Ambacher, O.
Journal Article
2009Development of AlGaN/GaN HEMTS with efficiencies above 60% up to 100 V for next generation mobile communication 100 W power bars
Waltereit, P.; Bronner, W.; Quay, R.; Dammann, M.; Müller, S.; Musser, M.; Mikulla, M.; Ambacher, O.; Rijs, F. van; Rödle, T.; Riepe, K.
Conference Paper, Journal Article
2009Gallium nitride MMICs for future reconnaissance and imaging applications
Quay, R.; Mikulla, M.; Waltereit, P.; Raay, F. van; Dammann, M.; Kühn, J.; Ambacher, O.; Schuh, P.
Conference Paper
2009GaN HEMT and MMIC development at Fraunhofer IAF: Performance and reliability
Waltereit, P.; Bronner, W.; Quay, R.; Dammann, M.; Kiefer, R.; Müller, S.; Musser, M.; Kühn, J.; Raay, F. van; Seelmann-Eggebert, M.; Mikulla, M.; Ambacher, O.; Rijs, F. van; Rödle, T.; Riepe, K.
Journal Article
2009Growth and electrical properties of AlxGa1-xN/GaN heterostructures with different Al-content
Köhler, K.; Müller, S.; Waltereit, P.; Kirste, L.; Menner, H.; Bronner, W.; Quay, R.
Journal Article
2009Impact of GaN cap thickness on optical, electrical, and device properties in AlGaN/GaN high electron mobility transistor structures
Waltereit, P.; Müller, S.; Bellmann, K.; Buchheim, C.; Goldhahn, R.; Köhler, K.; Kirste, L.; Baeumler, M.; Dammann, M.; Bronner, W.; Quay, R.; Ambacher, O.
Journal Article
2009L-to-Ka-band AlGaN/GaN HEMT power amplifiers with high efficiency
Quay, R.; Raay, F. van; Kühn, J.; Kiefer, R.; Waltereit, P.; Musser, M.; Maroldt, S.; Dammann, M.; Mikulla, M.; Ambacher, O.
Conference Paper
2009Reliability and degradation mechanism of AlGaN/GaN HEMTs for next generation mobile communication systems
Dammann, M.; Pletschen, W.; Waltereit, P.; Bronner, W.; Quay, R.; Müller, S.; Mikulla, M.; Ambacher, O.; Wel, P.J. van der; Murad, S.; Rödle, T.; Behtash, R.; Bourgeois, F.; Riepe, K.; Fagerlind, M.; Sveinbjörnsson, E.Ö.
Journal Article, Conference Paper
2009Reliability of AlGaN/GaN HEMTs under DC- and RF-operation
Dammann, Michael; Cäsar, M.; Waltereit, Patrick; Bronner, Wolfgang; Konstanzer, Helmer; Quay, Rüdiger; Müller, Stefan; Mikulla, Michael; Ambacher, O.; Wel, P. van der; Rödle, T.; Behtash, R.; Bourgeois, F.; Riepe, K.
Conference Paper
2009Verfahren zur Bestimmung der Struktur eines Transistors
Koehler, K.; Mueller, S.; Waltereit, P.
Patent
2008Efficient AlGaN/GaN HEMT power amplifiers
Quay, R.; Raay, F. van; Kühn, J.; Kiefer, R.; Waltereit, P.; Zorcic, M.; Musser, M.; Bronner, W.; Dammann, M.; Seelmann-Eggebert, M.; Schlechtweg, M.; Mikulla, M.; Ambacher, O.; Thorpe, J.; Riepe, K.; Rijs, F. van; Saad, M.; Harm, L.; Rödle, T.
Conference Paper
2008High-efficiency GaN HEMTs on 3-inch semi-insulating SiC substrates
Waltereit, P.; Bronner, W.; Quay, R.; Dammann, M.; Müller, S.; Kiefer, R.; Raynor, B.; Mikulla, M.; Weimann, G.
Journal Article
2008High-efficiency, high-breakdown AlGaN/GaN HEMTs with lifetimes beyond 20 years
Waltereit, P.; Bronner, W.; Quay, R.; Dammann, M.; Müller, S.; Mikulla, M.; Rijs, F. van; Rödle, T.; Riepe, K.
Conference Paper
2008Plasma assisted molecular beam epitaxy of AlGaN/GaN high electron mobility transistors
Aidam, R.; Kirste, L.; Kunzer, M.; Müller, S.; Waltereit, P.
Journal Article
2008Reliability and degradation mechanism of AlGaN/GaN HEMTs for next generation mobile communication systems
Dammann, M.; Pletschen, W.; Waltereit, P.; Bronner, W.; Quay, R.; Müller, S.; Mikulla, M.; Ambacher, O.; Wel, P.J. van der; Murad, S.; Rödle, T.; Behtash, R.; Bourgeois, F.; Riepe, K.; Fagerlind, M.; Sveinbjörnsson, E.Ö.
Conference Paper
2008A uniform, reproducible and reliable GaN HEMT technology with breakdown voltages in excess of 160 V delivering more than 60% PAE at 80 V
Waltereit, P.; Bronner, W.; Quay, R.; Dammann, M.; Müller, S.; Kiefer, R.; Walcher, H.; Raay, F. van; Kappeler, O.; Mikulla, M. et al.
Conference Paper
2002Anharmonicity of the E2(high) and A(1)(LO) phonons in GaN studied by temperature-dependent Raman spectroscopy
Giehler, M.; Ramsteiner, M.; Waltereit, P.; Brandt, O.; Ploog, K.H.; Obloh, H.
Journal Article
2001Influence of heteroepitaxy on the width and frequency of the e-2 (high)-phonon line in GaN studied by Raman-spectroscopy
Giehler, M.; Ramsteiner, M.; Waltereit, P.; Brandt, O.; Ploog, K.H.; Obloh, H.
Journal Article