34 research outputs found

    Monolithisch integrierte HFET-Leistungsverstaerker fuer Mobilfunkanwendungen: Abschlussbericht zum Forschungsvorhaben im Rahmen des Foerderschwerpunktes Mobile Kommunikationssysteme fuer den Bearbeitungszeitraum vom 01.01.1996 bis 31.12.1999

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    SIGLEAvailable from TIB Hannover: F 01 B 526 a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung und Forschung, Berlin (Germany)DEGerman

    Polytektische Strukturierungsverfahren. Laterale und vertikale Feinstrukturierungen von III/V-Schichtsystemen

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    Available from TIB Hannover: F96B1700+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman

    Abscheidung von Resist-Schichten durch strahlinduzierte Polymerisation Kennwort: Trockenresist. Abschlussbericht

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    With 6 figs.SIGLECopy held by UB/TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

    Nitridische Verbindungshalbleiter mit hohem Bandabstand. Teilprojekt: Metallorganische Gasphasenepitaxie von nitridischen Verbindungshalbleitern mit hohem Bandabstand fuer blaue LEDs Abschlussbericht

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    Because of their band structure the semiconductors GaN, (InGa)N and (AlGa)N are ideally suited for the fabrication of optoelectronic devices in the blue and near UV spectral range. This project aimed at the development of device grade nitride MOCVD single layers and layer sequences on saphire substrate and of the process technology for the fabrication of blue, violet and UV LED chips. The MOCVD deposition technique for In_xGa_1_-_xN (x#<=#0.2), GaN and Al_xGa_1_-_xN (x#<=#0.2) single layers and multi layers suitable for LED operation was developed in close cooperation with the material characterization. The substrate temperature and the low temperature GaN nucleation layer turned out to be very important parameters for growth of high quality GaN films. Special attention was paid to the optimization of p-conduction in GaN:Mg and (AlGa)N:Mg and to the growth of high quality (InGa)N films. The lithography-, etching-, and metallization processes required for lateral patterning of 2'' wafers were worked out. Apart from n-GaN:Si layers, p-GaN:Mg, p-(AlGa)N:Mg, and (InGa)N single layers with very good quality can be grown reproducibly. Completely housed green, blue, and violet radial LEDs have been demonstrated. By the end of the project the emitted power for violet (410 nm) and UV (394 nm) LED chips amounted to 0.46 and 0.34 mW, respectively, at a drive current of 40 mA. (orig.)SIGLEAvailable from TIB Hannover: F99B881+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman

    Photonik II. Optische Verbindungstechnik (Optische Mikrowellenverbindungen). Teilvorhaben: Empfaenger-OEIC fuer GHz-Millimeterwellensignale Abschlussbericht

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    According to the specifications of the project partner Alcatel SEL the IAF has developed, produced and characterized amplifier MMICs with more than 25 dB gain rate at 60 GHz and delivered to the partners. According to the requirements of Alcatel SEL additional amplifiers with a higher saturated power were developed during the project trying to extend the maximum possible radio distance. Accordingly, the IAF has developed and produced a power amplifier with a P_-_1_d_B-power of more than 20 dBm and 60 GHz. Based on the MMICs developed by the IAF Alcatel was able to build a powerful amplifier module with 55 dB gain. The InGaAs-PIN-photodiodes has been successfully integrated in the existing GaAs-HEMT-MMIC-process with a gate-length of 0.15 #mu#m for millimeter wave circuits. First optical receivers for hybrid-fiber radio-systems at 42 GHz have been successfully produced. (orig.)SIGLEAvailable from TIB Hannover: DtF QN1(68,56) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman

    Integrierte Mikrokuehlsysteme fuer elektronische Baugruppen (KUeHLSYS). Teilprojekt: CVD-Diamant-Waermespreizer mit Zusatzfunktionen: Simulation, thermomechanische Charakterisierung und Komponentenentwicklung Abschlussbericht

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    Available from TIB Hannover: F99B502+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman
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