scholarly journals High‐Resolution Crystal Truncation Rod Scattering: Application to Ultrathin Layers and Buried Interfaces

2020 ◽  
Vol 7 (6) ◽  
pp. 1901772 ◽  
Author(s):  
Ankit S. Disa ◽  
Frederick J. Walker ◽  
Charles H. Ahn
Keyword(s):  
High Resolution ◽  
Buried Interfaces ◽  
Crystal Truncation Rod ◽  
Ultrathin Layers

Characterization of Single- and Multiple-Layer Films by X-Ray Reflectometry

1991 ◽  
Vol 35 (A) ◽  
pp. 137-142 ◽  
Author(s):  
T. C. Huang ◽  
W. Parrish
Keyword(s):  
Experimental Data ◽  
Thin Films ◽  
High Resolution ◽  
Single Layer ◽  
The Other ◽  
X Ray ◽  
Buried Interfaces ◽  
Multiple Layer ◽  
Reflectivity Data

AbstractPrecision X-ray reflectivity data were obtained with a high-resolution reflectometer equipped with a rotating anode X-ray source and Ge 220 channel monochromators (one placed before and the other after the specimen). The surfaces and buried interfaces of thin films were characterized by ieast-squares refinement of experimental data. Values of thickness, density, and/or roughness of Pt “single-layer” and Pt/Co based multiple-layer films were determined.

High-resolution picosecond acoustic microscopy for non-invasive characterization of buried interfaces

2006 ◽  
Vol 21 (5) ◽  
pp. 1204-1208 ◽  
Author(s):  
Shriram Ramanathan ◽  
David G. Cahill
Keyword(s):  
High Resolution ◽  
Spatial Resolution ◽  
Integrated Circuit ◽  
Acoustic Waves ◽  
Spot Size ◽  
Acoustic Microscopy ◽  
Microscopy Technique ◽  
Fundamental Limitations ◽  
Buried Interfaces ◽  
Advanced Packaging

Non-destructive investigation of buried interfaces at high-resolution is critical for integrated circuit and advanced packaging research and development. In this letter, we present a novel non-contact microscopy technique using ultrahigh frequency (GHz range) longitudinal acoustic pulses to form images of interfaces and layers buried deep inside a silicon device. This method overcomes fundamental limitations of conventional scanning acoustic microscopy by directly generating and detecting the acoustic waves on the surface of the sample using an ultrafast pump-probe optical technique. We demonstrate our method by imaging copper lines buried beneath a 6-μm silicon wafer; the lateral spatial resolution of 3 μm is limited by the laser spot size. In addition to the high lateral spatial resolution, the technique has picosecond (ps) time resolution and therefore will enable imaging individual interconnect layers in multi-layer stacked devices.

ELECTRONIC PROPERTIES OF CALCIUM ULTRATHIN LAYERS ON Cu(111): A HIGH-RESOLUTION ELECTRON ENERGY LOSS SPECTROSCOPY STUDY

2010 ◽  
Vol 17 (04) ◽  
pp. 411-417 ◽  
Author(s):  
ANTONIO POLITANO
Keyword(s):  
High Resolution ◽  
Energy Loss ◽  
Electronic Properties ◽  
Electron Energy ◽  
Surface Plasmon ◽  
Electron Energy Loss Spectroscopy ◽  
Thin Layers ◽  
Resolution Electron ◽  
Ultrathin Layers ◽  
Electron Energy Loss

The electronic properties of a Ca bilayer deposited on Cu(111) have been investigated by high-resolution electron energy loss spectroscopy. For the as-deposited Ca bilayer, the surface plasmon was recorded at 3.3eV. Temperature induces a surface metal-insulator transition (evidenced by the shift of the surface plasmon energy), leading to the formation of CaO thin layers which are highly reactive towards water molecules. The presence of occupied d band in the calcium overlayer modifies surface plasmon frequency and strongly influences its dispersion relation. Results are well explained within the framework of the s-d polarization theory.

Non-destructive high-resolution characterization of buried interfaces for advanced interconnect and packaging architectures: Experiments and modeling

2005 ◽  
Vol 82 (1) ◽  
pp. 84-91
Author(s):  
Shriram Ramanathan ◽  
Chuan Hu ◽  
Evan Pickett ◽  
Patrick Morrow ◽  
Yongmei Liu ◽  
...  
Keyword(s):  
High Resolution ◽  
Buried Interfaces ◽  
Non Destructive

Fermat's interferometric principle for target-oriented traveltime tomography

Geophysics ◽  
2005 ◽  
Vol 70 (4) ◽  
pp. U47-U50 ◽  
Author(s):  
Gerard T. Schuster
Keyword(s):  
High Resolution ◽  
Velocity Distribution ◽  
Velocity Model ◽  
Traveltime Tomography ◽  
Buried Interfaces ◽  
Transit Times ◽  
Fermat's Principle ◽  
Resolution Estimation ◽  
Oriented Approach ◽  
Whole Earth

An interferometric form of Fermat's principle is derived that allows for high-resolution estimation of the velocity distribution between deep interfaces. The data consist of reflection traveltimes from two deeply buried interfaces A and B recorded by sources and caused by receivers at the surface. Fermat's interferometric principle is then used to kinematically redatum the surface sources and receivers to interface A so that the associated reflection times correspond to localized transit times between the A and B interfaces. The velocity model above interface A does not need to be known, so the distorting effects of the overburden and statics are eliminated by this target-oriented approach. Interferometric target-oriented tomography promises to enhance the resolution of whole-earth and exploration tomograms.

Observations of the spatial structure of interstellar hydrogen

1967 ◽  
Vol 31 ◽  
pp. 45-46
Author(s):  
Carl Heiles
Keyword(s):  
High Resolution ◽  
Spatial Structure ◽  
Velocity Dispersion ◽  
Temperature Variations

High-resolution 21-cm line observations in a region aroundlII= 120°,b11= +15°, have revealed four types of structure in the interstellar hydrogen: a smooth background, large sheets of density 2 atoms cm-3, clouds occurring mostly in groups, and ‘Cloudlets’ of a few solar masses and a few parsecs in size; the velocity dispersion in the Cloudlets is only 1 km/sec. Strong temperature variations in the gas are in evidence.

Combining integrated systems-biology approaches with intervention-based experimental design provides a higher-resolution path forward for microbiome research

2019 ◽  
Vol 42 ◽  
Author(s):  
J. Alfredo Blakeley-Ruiz ◽  
Carlee S. McClintock ◽  
Ralph Lydic ◽  
Helen A. Baghdoyan ◽  
James J. Choo ◽  
...  
Keyword(s):  
Systems Biology ◽  
High Resolution ◽  
Experimental Design ◽  
Integrated Systems ◽  
Microbiome Research ◽  
Constructive Criticism

Abstract The Hooks et al. review of microbiota-gut-brain (MGB) literature provides a constructive criticism of the general approaches encompassing MGB research. This commentary extends their review by: (a) highlighting capabilities of advanced systems-biology “-omics” techniques for microbiome research and (b) recommending that combining these high-resolution techniques with intervention-based experimental design may be the path forward for future MGB research.

Very High Resolution Analysis of the Dynamics of a Coronal Plasmoid

1994 ◽  
Vol 144 ◽  
pp. 593-596
Author(s):  
O. Bouchard ◽  
S. Koutchmy ◽  
L. November ◽  
J.-C. Vial ◽  
J. B. Zirker
Keyword(s):  
High Resolution ◽  
Solar Eclipse ◽  
Total Solar Eclipse ◽  
Field Of View ◽  
Small Field ◽  
High Resolution Analysis ◽  
Ccd Observations ◽  
Resolution Analysis ◽  
Very High ◽  
Small Field Of View

AbstractWe present the results of the analysis of a movie taken over a small field of view in the intermediate corona at a spatial resolution of 0.5“, a temporal resolution of 1 s and a spectral passband of 7 nm. These CCD observations were made at the prime focus of the 3.6 m aperture CFHT telescope during the 1991 total solar eclipse.

FeXIV Line Emission Polarization of the July 11, 1991 Solar Corona

1994 ◽  
Vol 144 ◽  
pp. 541-547
Author(s):  
J. Sýkora ◽  
J. Rybák ◽  
P. Ambrož
Keyword(s):  
High Resolution ◽  
Solar Corona ◽  
Emission Line ◽  
Solar Eclipse ◽  
White Light ◽  
Preliminary Analysis ◽  
Line Emission ◽  
Total Solar Eclipse ◽  
Degree Of Polarization ◽  
High Resolution Images

AbstractHigh resolution images, obtained during July 11, 1991 total solar eclipse, allowed us to estimate the degree of solar corona polarization in the light of FeXIV 530.3 nm emission line and in the white light, as well. Very preliminary analysis reveals remarkable differences in the degree of polarization for both sets of data, particularly as for level of polarization and its distribution around the Sun’s limb.

Sign in / Sign up

Export Citation Format

Share Document