+ Visit NASA.gov + Contact NASA   + Home Select Search Field * All Report - Patent Number Abstract *Accession Number *NASA Center *Author NameDocument IDKeywordsPublication Date *Title * Find Results With All of the words At least one of the words Enter Search Term  within returned results    Search Tips: Use only the fields with * to search NIX collection. Enclose terms in double quotation marks (") to search for exact phrases, ie: "space shuttle". NOTE: Commas and dashes are removed from search term by search engine. Select Reset Search button to start a new search. See Help for more tips. + Publication Year – Subject  + A-C  + D-F  + J-L  + P-R + Availability Options + Item/Media Type Selected Navigations: Author > Leon, R. [x] Sort results by: NASA Center | Date Added to NTRS | Publication Year There are a total of 26 record(s) matching your query. Sorted by: Date Added To NTRS in Descending order 1 2 3 Next  Interactions, Interdiffusion and Segregation in Quantum Dot Ensembles Author(s): Leon, R. Abstract: Statistically non-interacting quantum dot ensembles can be achieved by raising surface energies during growth. NASA Center: Jet Propulsion Laboratory Publication Year: 2000 Added to NTRS: 2006-12-25 Document ID: 20060032474 Transmission Electron Microscopy Study of InGaAs/GaAs Structural Evolution Near the Stranski-Krastanow Transformation Author(s): Leon, R.; Wellman, J.; George, T. Abstract: No Abstract Available NASA Center: Jet Propulsion Laboratory Publication Year: 1999 Added to NTRS: 2006-12-25 Document ID: 20060034140 Electrical and structural investigation of the effects of via-conductor geometry in the electromigration of AL:CU Author(s): Leon, R.; Vu, D.; Johnson, A. S.; Ruiz, R.; Okuno, J.; Uribe, J.; Hather, G.; Lloyd, . R. Abstract: Electromigration experiments, their results at different densities. NASA Center: Jet Propulsion Laboratory Publication Year: 2001 Added to NTRS: 2006-12-25 Document ID: 20060042457 Effects of Humidity on Non-Hermetically Packaged III-V Structures and Devices Author(s): Leon, R.; Martin, S.; Lee, T.; Okuno, J.; Ruiz, R.; Gauldin, R.; Gaidis, M.; Smith, R. Abstract: High humidity and temperature test (known as 85/85 tests) were performed on various III-V devices and structures to determine environmental effects in non-hermetically packaged GaAs membrane mixer diodes. NASA Center: Jet Propulsion Laboratory Publication Year: 1999 Added to NTRS: 2006-12-25 Document ID: 20060040938 Ensemble Interactions in Strained Semiconductor Quantum Dot Author(s): Leon, R.; Marcinkevicius, S.; Liao, X.; Zou, J.; Cockayne, D.; Fafard, S. Abstract: Large variations in InGaAs quantum dot concentrations were obtained with simultaneous growths on vicinal GaAs[001] substrates with different surface step densities. NASA Center: Jet Propulsion Laboratory Publication Year: 1999 Added to NTRS: 2006-12-25 Document ID: 20060040918 Proton Induced Optical Degradation in InGaAs/GaAs Quantum Confined Structures Author(s): Leon, R.; Swift, G.; Magness, B.; Taylor, W.; Tang, Y.; Wang, K.; Dowd, P.; Zhang, Y. Abstract: No Abstract Available NASA Center: Jet Propulsion Laboratory Publication Year: 1999 Added to NTRS: 2006-12-25 Document ID: 20060040937 Dislocation-induced Charges in Quantum Dots: Step Alignment and Radiative Emission Author(s): Leon, R.; Okuno, J.; Lawton, R.; Stevens-Kalceff, M.; Phillips, M.; Zou, J.; Cockayne, D.; Lobo, C. Abstract: A transition between two types of step alignment was observed in a multilayered InGaAs/GaAs quantum-dot (QD) structure. A change to larger QD sizes in smaller concentrations occurred after formation of a dislocation array. NASA Center: Jet Propulsion Laboratory Publication Year: 1999 Added to NTRS: 2006-12-25 Document ID: 20060040634 Interdiffusion, Segregation, Ensemble Interactions, and Radiation Induced Effects in InGaAs/GaAs Quantum Dots Author(s): Leon, R. Abstract: No Abstract Available NASA Center: Jet Propulsion Laboratory Publication Year: 2000 Added to NTRS: 2006-12-25 Document ID: 20060032407 Defect states in red emitting InAlAs quantum dots Author(s): Leon, R.; Ibanez, J.; Marcinkevicius, S.; Siegert, J.; Paskova, T.; Monemar, B.; Chaparro, S.; Navarro, C.; Johnson, S. R.; Zhang, Y. H. Abstract: No Abstract Available NASA Center: Jet Propulsion Laboratory Publication Year: 2002 Added to NTRS: 2006-12-25 Document ID: 20060030976 Effects of via-conductor geometry in the electromigration failure of Al:Cu wires Author(s): Leon, R.; Vu, D.; Johnson, A. S.; Ruiz, R.; Okuno, J.; Uribe, J.; Hather, G.; Lloyd, J. R. Abstract: Electromigration (EM) experiments conducted using two types of via/plug to conductor alignment indicate a geometrical dependence of electromigration failure in Al:Cu conductors. The resistance vs time curves show ... NASA Center: Jet Propulsion Laboratory Publication Year: 2001 Added to NTRS: 2006-12-25 Document ID: 20060031511 1 2 3 Next  + Back to Top + Sponsored by the NASA Scientific and Technical    Information Program + 2004 Vision for Space Exploration + Freedom of Information Act + NASA Web Privacy Policy and Important Notices + NASA Disclaimers, Copyright Notice,    and Terms and Conditions of Use NASA Official: Calvin Mackey Page Curator: NASA Center for AeroSpace Information (help@sti.nasa.gov) Last Updated: July 5, 2007