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Displaying 45551 - 45575 of 74141

Bidirectional Reflectance Distribution Function of Rough Silicon Wafers

July 1, 2001
Author(s)
Y J. Shen, Z M. Zhang, Benjamin K. Tsai, D P. DeWitt
The trend towards miniaturization of patterning features in integrated circuits (IC) has made traditional batch furnaces inadequate for many processes. Rapid thermal processing (RTP) for silicon wafers has become more popular in recent years for IC

Calculation of Phase Equilibria in Candidate Solder Alloys

July 1, 2001
Author(s)
Ursula R. Kattner, C A. Handwerker
New solder alloys are being developed for electronic assemblies as replacements for traditional Pb-containing solder materials as a result of international pressure to remove Pb from the waste stream. In the transition period from Pb-containing to Pb-free

CDMA2000 Reverse-Link Simulation Model Design and Evaluation

July 1, 2001
Author(s)
Hamid Gharavi, R Wyatt-Millington, F Chin
This paper presents the design and implementation of a simulation model for the cdma2000 reverse link. The model includes all the radio configurations and their corresponding data rates in accordance with the IS-2000 specifications. The paper first

Combinatoral Study of Surface Pattern Formation in Thin Block Copolymer Films

July 1, 2001
Author(s)
A P. Smith, Jack F. Douglas, Alamgir Karim, J C. Meredith, Eric J. Amis
We investigate surface patterns in thin block copolymer films with a gradient in thickness, h. The usual hole and island morphologies are found when h varies from integral multiples m of the bulk lamellar thickness Lo but spinodal-like hole and island

Combinatorial Study of Surface Pattern Formation in Thin Block Copolymer Films

July 1, 2001
Author(s)
A P. Smith, Jack F. Douglas, J C. Meredith, Eric J. Amis, Alamgir Karim
Surface pattern formation in thin diblock copolymer films is investigated utilizing a high-throughput methodology to validate the combinatorial measurement approach for polymer science. Measurement libraries of block copolymer films having gradients in

Concrete Optimization Software Tool User's Guide

July 1, 2001
Author(s)
M J. Simon, Dale P. Bentz, James J. Filliben
This user's guide provides instructions for and examples of using the Concrete Optimization Software Tool (COST), a joint product of the Federal Highway Administration and the National Institute of Standards and Technology. COST provides an internet-based

Cooling of a Single Atom in an Optical Trap Inside a Resonator

July 1, 2001
Author(s)
S J. van Enk, J McKeever, H J. Kimble, Jun Ye
We present detailed discussions of cooling and trapping mechanisms for an atom in an optical trap inside an optical cavity, as relevant to recent experiments. The interference pattern of cavity QED and trapping fields in space makes the trapping wells

Dark Pulse Formation in a Quantum Dot Laser

July 1, 2001
Author(s)
Jonathan Zimmerman, Steven T. Cundiff, G von Plessen, J Feldmann, M Arzberger, J Bohm, M C. Amann, G Abstreiter
The laser emission of an InAS/GaAs quantum dot laser after injection of a non-resonant optical pulse is time resolved using femtosecond upconversion. The injected pulse burns a spectral hole into the gain spectrum that leads to an ultrafast redistribution

Dielectric and Conductor-Loss Characterization and Measurements on Electronic Packaging Materials

July 1, 2001
Author(s)
James R. Baker-Jarvis, Michael D. Janezic, Billy F. Riddle, Christopher L. Holloway, Nicholas Paulter, J Blendell
This is an overview of dielectric measurement methods and metrology on substrate materials used in electronic packaging. These substrates include low-temperature co-fired ceramic, high-temperature co-fired ceramic substrates, printed wiring board, and

DTA/TGA Study of Eutectic Melting in the System BaF 2 -BaO-Y 2 O 3 -CuO x -H 2 O

July 1, 2001
Author(s)
Lawrence P. Cook, Winnie K. Wong-Ng, J Suh
Differential thermal analysis and thermogravimetric analysis (DTA/TGA) experiments have been completed in the BaF2-BaO-Y2O3-CuOx-H2O system at various oxygen pressures to determine the effect of adding BaF2 and H2O on the eutectic melting in the system BaO

Dynamical Tunnelling of Ultracold Atoms

July 1, 2001
Author(s)
W K. Hensinger, H Heffner, A Browaeys, N R. Heckenberg, Kristian Helmerson, C R. McKenzie, G J. Milburn, William D. Phillips, S L. Rolston, H Rubinsztein-Dunlop, B Upcroft
Nowhere does the divergence of the quantum and classical descriptions of particle motion become more apparent than in quantum tunneling between two regions of classically stable motion. An archetype of such nonclassical motion, studied since the earlies

Dynamics of Collapsing and Exploding Bose-Einstein Condensates

July 1, 2001
Author(s)
E A. Donley, N R. Claussen, S L. Cornish, J L. Roberts, Eric A. Cornell, C E. Wieman
We have explored the dynamics of how a Bose-Einstein condensate collapses when it is suddenly put into the unstable regime of attractiveinteractions. The ability to change the strength and sign of the inter-atomic interactions by tuning the magnetic field

Elastic Constants of Mullite Containing Alumina Platelets

July 1, 2001
Author(s)
H M. Ledbetter, Sudook A. Kim, Martin Dunn, Z Xu, S Crudele, W Kriven
Using dynamic methods, we measured the elastic constants of a composite comprising alumina platelets (0.2 volume fraction) in a 3:2-mullite matrix. Instead of the expected elastic stiffening, we found an elastic softening. For example, the Young modulus

Electrometrology and NIST -- New Directions

July 1, 2001
Author(s)
William E. Anderson
I gaze into a somewhat cloudy crystal ball to predict the directions of electrical metrology in the next fifteen years. The emphasis on standards based on fundamental constants of nature and on quantum-mechanical principles will move from the base units to
Displaying 45551 - 45575 of 74141
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