An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
We measure the electrical parameters of commercial lumped-element impedance standards manufactured for the calibration of on-wafer probing systems. The standard
This paper presents a new method that accurately determines the characteristic impedance of planar transmission lines printed on lossy dielectrics even when
This paper investigates the one-dimensional metal-insulator-semiconductor transmission line. It develops closed-form expressions for equivalent-circuit
Web sites are developed by a wide variety of companies from small one or two person operations to large corportions with entire teams and departments devoted to
Leonard E. Gebase, Mary C. Brady, Alden A. Dima, Lynne S. Rosenthal
A well-established approach to conformance testing is to treat the implementation being tested as a black box. With this approach, a reference implementation is
Despite their many advantageous characteristics and extensive use, mixtures of methyl methacrylate monomers (MMA) and poly methyl methacrylate powders have some
R Deslattes, Ernest G. Kessler, Paul Indelicato, E Lindroth
In this brief report we describe some of the background for our continuing efforts toward a new comprehensive data base for x-ray transitions, and indicate the
Michael A. Lewis, T Kuriyama, J Xiao, Ray Radebaugh
This paper gives results of the cooling performance of a double-inlet pulse tube refrigerator using various redenerators. The same pulse tube was used for all
Two novel acoustic resonators have been developed, one for measuring the viscosity and a second for measuring the Prandtl number of gases. For viscosity
Our laboratory has developed an automated apparatus for measuring the sound speed in hazardous gases such as those used in processing semiconductors. The sound
Ronald G. Dixson, R Koning, Theodore V. Vorburger, Joseph Fu, V W. Tsai
Because atomic force microscopes (AFMs) are capable of generating three dimensional images with nanometer level resolution, these instruments are being
In scanned probe microscopy, it is necessary to know the tip's geometry in order to correct image distortions due to its finite size. Heretofore, methods have
Dimensional measurements of importance to microlithography include feature sizes and feature placement on photomasks and wafers, overlay eccentricities, defect
We developed a noninvasive x-ray technique to monitor the solidification of single-crystal castings. X-ray energies in the 150 keV to 320 keV range have
This investigation compared the performance of R22 to the performance of R290 and that of flammable zeotropic mixtures, R32/290 and R32/152a. The tests were
J Allgair, C Archie, W Banke, H Bogardus, J Griffith, H Marchman, Michael T. Postek, L Saraf, J Schlesinger, B Singh, N. Sullivan, L Trimble, Andras Vladar, A Yanof
The stringent critical dimension (CD) control requirements in cutting edge device facilities have placed significant demands on metrologists and upon the tools
A new method is presented to determine the time-base errors of sampling instruments. The method does not require a model for the time-base error and, thus
Accurate measurement of high voltage (hv) impulse waveforms is of critical importance in the testing of hv apparatus and for fundamental insulation studies
The adhesive strength of a composite resin to dentin is greatly influenced by the degree of cure of the bonding agent. Flouorescent probes have often been used
William F. Egelhoff Jr., P J. Chen, Cedric J. Powell, D Parks, Robert McMichael, J Judy, D Martien, A. E. Berkowitz, J M. Daughton
The current generation of giant magnetoresistance (GMR) spin valves exhibits performance characteristics which are not quite as good as desired for ultrahigh
The long term stability of multilayer materials composed of nonreactive, immiscible materials is related to the equilibrium shapes of the individual grains
Richard M. Silver, Carsten P. Jensen, V W. Tsai, Joseph Fu, John S. Villarrubia, E C. Teague
We are developing the instrumentation and prototype samples at NIST to enable the counting of atom-spacings across linewidth features etched in silicon. This is
Y Chen, John S. Suehle, Chien-Chung Shen, J B. Bernstein, C. Messick, P Chaparala
A new technique is proposed to extract long-term constant voltage stress time-dependent dielectric breakdown (TDDB) acceleration parameters from highly
Anzor I. Mikaia, Vladimir G. Zaikin, Vasilii N. Yakushin, Elvira A. Volnina
Diagnostically important peaks in the mass spectra of 1-ethyl-1-cyclopentyl, 1-methyl- and 1-ethyl- 1-cyclohexyl, and 1-(2-chloroethyl)-1-silacyclohexyl
C L. Clifton, S G. Lias, Anzor I. Mikaia, O D. Sparkman, Stephen Stein, Dmitrii Tchekhovskoi, Damo Zhu, Vladimir G. Zaikin
The goal of quality control procedures is to produce the best possible spectra for library searching. The role of a panel of data evaluators is presented, and
James H. Yen, D L. Banks, Leonard J. Gallagher, Paul E. Black, Robert C. Hagwood, Raghu N. Kacker, Lynne S. Rosenthal
Software testing is hard, expensive, and uncertain. Many protocols have been suggested, especially in the area of conformance verification. In order to compare
The Building and Fire Research Laboratory at the National Institute of Standards and Technology, under the sponsorship of the United States Fire Administration
Efficient data combination over wide-area networks is hard as wide-area networks have large variations in available network bandwidth. In this paper, we examine