AuGeNi and AuZnNi metallizations to n- and p-InP were studied as a function of the annealing temperature in a Rapid Thermal Annealing (RTA) system. For n-InP (S: 8 X 10(18) cm-3) a broad minimum existed from 385-degre...
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(纸本)0444890661
AuGeNi and AuZnNi metallizations to n- and p-InP were studied as a function of the annealing temperature in a Rapid Thermal Annealing (RTA) system. For n-InP (S: 8 X 10(18) cm-3) a broad minimum existed from 385-degrees-C to 500-degrees-C, in which the specific contact resistance, r(c), was about 10(-7)OMEGA-cm2. The lowest value of 7 X 10(-8)OMEGA-cm2 for n-InP occurred after RTA for 20 sec. at 450-degrees-C. For p-InP (Zn:5 X 10(18) cm-3) the lowest value of r(c), 7 X 10(-6)OMEGA-cm2, was obtained for AuZn without any Ni. Metallurgical investigations indicated, that low r(c) values were associated with interfacial reactions and the formation of stable barrier-lowering metal-phosphides.
An implementation of a technology CAD environment is presented, using a level concept for the system: a data level provides simulation data retrieval facilities, a tool level is used for tool integration and a task le...
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An implementation of a technology CAD environment is presented, using a level concept for the system: a data level provides simulation data retrieval facilities, a tool level is used for tool integration and a task level aids complex developments and user interaction.
A generic engineering trade study methodology has been developed to provide an effective framework for the system analysis of regenerative live support systems. The performance of engineering tradeoffs is a key techni...
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A thermal model has been developed to evaluate, from a thermal and performance standpoint, a preliminary design of a Neutral Buoyancy Cryogenic fluid delivery system (NBCS). The NBCS is an important component of a Neu...
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The new European ARIANE 5 launcher being designed to put a payload mass of 6.8 t into geostationary transfer orbit is scheduled to be operational in 1995. It consists of a lower central stage with two solid propellant...
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A new physical modeling of the forward transit time Τ f in bipolar transistors for a large range of collector-current densities j C at various base-collector voltages V BC is presented. The validity of this model ...
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A new physical modeling of the forward transit time Τ f in bipolar transistors for a large range of collector-current densities j C at various base-collector voltages V BC is presented. The validity of this model is confirmed by measurements on fast self-aligned silicon bipolar transistors and by device simulations.
A solid amine based Regenerative CO2 Removal system (RCRS) has been selected by NASA/JSC for extended Orbiter missions. To better understand the performance of solid amine, a bench scale solid amine teststand was bui...
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optimization methodologies based on the Brigham Young University OPTDES code are used to determine the minimum per capita crop area required for Controlled Environmental Life Support systems (CELSS) needed for self-su...
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For the efficient application of a self-aligned source contact concept the optimization of a DMOSFET cell with respect to the specific on-resistance and voltage blocking capability has been carried out by numerical de...
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For the efficient application of a self-aligned source contact concept the optimization of a DMOSFET cell with respect to the specific on-resistance and voltage blocking capability has been carried out by numerical device simulations. It is shown that, in order to get appropriate predictions of the device characteristics, it is essential to consider rotational symmetry. Especially for small contact sizes, realistic contacts and doping profiles resulting from three-dimensional calculations have been taken into account.
An Automated Design Environment for MMIC design is presented. The architecture of the Environment based upon the use of expert systems is described and the methods by which different levels of design knowledge are pre...
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An Automated Design Environment for MMIC design is presented. The architecture of the Environment based upon the use of expert systems is described and the methods by which different levels of design knowledge are presented to and addressed by the system are discussed. A detailed view of the program architecture based upon a validated MMIC design algorithm is given. The paper concludes with a brief look at the advantages obtained through use of the system.
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