The Role of Surface Acoustic Waves in Scanning Acoustic Microscopy

1991 ◽  
pp. 3-12
Author(s):  
Laszlo Adler
Keyword(s):  
Acoustic Waves ◽  
Surface Acoustic Waves ◽  
Acoustic Microscopy ◽  
Scanning Acoustic Microscopy

The role of electric field in microfluidic heating induced by standing surface acoustic waves

2018 ◽  
Vol 112 (23) ◽  
pp. 233702 ◽  
Author(s):  
Tengfei Zheng ◽  
Chaohui Wang ◽  
Qiao Hu ◽  
Shoupeng Wei
Keyword(s):  
Electric Field ◽  
Acoustic Waves ◽  
Surface Acoustic Waves

scholarly journals The Interaction between Surface Acoustic Waves and Spin Waves: The Role of Anisotropy and Spatial Profiles of the Modes

Nano Letters ◽  
2020 ◽  
Author(s):  
Nandan K. P. Babu ◽  
Aleksandra Trzaskowska ◽  
Piotr Graczyk ◽  
Grzegorz Centała ◽  
Szymon Mieszczak ◽  
...  
Keyword(s):  
Acoustic Waves ◽  
Spin Waves ◽  
Surface Acoustic Waves

Mechanical basis of cell shape: investigations with the scanning acoustic microscope

1995 ◽  
Vol 73 (7-8) ◽  
pp. 337-348 ◽  
Author(s):  
Jürgen Bereiter-Hahn ◽  
Llonka Karl ◽  
Holger Lüers ◽  
Monika Vöth
Keyword(s):  
Low Temperature ◽  
Cell Shape ◽  
Giant Cells ◽  
Bulk Flow ◽  
Acoustic Microscopy ◽  
Scanning Acoustic Microscopy ◽  
Acoustic Microscope ◽  
Mechanical Basis ◽  
Scanning Acoustic Microscope

The shape of cells during interphase in sparse cultures often resembles that of fried eggs. XTH-2 cells, which have been derived from tadpole heart endothelia, provide a typical example of this type of shape. To understand the physical basis of this shape, the cytoskeleton of these cells has been investigated in detail. Subcellular elasticity data have been achieved by scanning acoustic microscopy (SAM). Their changes were observed during treatment of the cells with microtubule-disrupting agents (colcemid and low temperature), and shape generation in giant cells produced by electro-fusion was observed with SAM, revealing the role of the nucleus as a force centering organelle. From these observations combined with well-documented observations on cellular dynamics described in the literature, a model is developed explaining the fried-egg shape of cells by means of interacting forces and fluxes (cortical flow, bulk flow of cytoplasm, microtubule-mediated transport of cytoplasm) of cytoplasm. The model also allows the comprehension of the increase of tension in cells treated with colcemid.Key words: cell shape, elasticity, grant cells, microtubules, acoustic microscopy.

Quantitative Short-pulse Acoustic Microscopy and Application to Materials Characterization

2000 ◽  
Vol 6 (1) ◽  
pp. 59-67
Author(s):  
Theodore E. Matikas
Keyword(s):  
Elastic Property ◽  
Acoustic Waves ◽  
Short Pulse ◽  
Surface Acoustic Waves ◽  
Tone Burst ◽  
Acoustic Microscopy ◽  
Near Surface ◽  
Microscopy Technique ◽  
Setup Phase ◽  
Additional Reference

Abstract A new acoustic microscopy method was developed for providing near-surface elastic property mapping of a material. This method has a number of advantages over the traditional V(z) technique. First, it enables one to perform measurements in an automated mode that only requires user intervention in the setup phase. This automated mode makes it feasible to obtain quantitative microscopy images of the elastic property over an area on the material being tested. Also, it only requires a conventional ultrasonic system operating in pulsed mode for collecting the data, rather than a specialized tone-burst system, which is needed in the traditional quantitative scanning acoustic microscopy technique. Finally, unlike the traditional method, the new experimental process does not require calibration of the systems electronics or additional reference data taken under hard-to-duplicate identical conditions from a material that does not exhibit surface acoustic waves.

scholarly journals Local Study of Thin-Film Adhesion by Surface Acoustic Waves and Subsurface Acoustic Microscopy Imaging

1996 ◽  
Vol 06 (C8) ◽  
pp. C8-795-C8-798
Author(s):  
P. Richard ◽  
G. Gremaud ◽  
J. Thomas ◽  
A. Kulik ◽  
W. Benoit
Keyword(s):  
Thin Film ◽  
Acoustic Waves ◽  
Surface Acoustic Waves ◽  
Acoustic Microscopy ◽  
Microscopy Imaging ◽  
Local Study ◽  
Film Adhesion ◽  
Thin Film Adhesion

Non-Destructive Visualization of Bond Pad Defects using Acoustic Microscopy in the GHz-Band

2018 ◽  
Author(s):  
Sebastian Brand ◽  
Michael Kögel ◽  
Frank Altmann ◽  
Stefan Oberhoff ◽  
Michael Wiedenmann ◽  
...  
Keyword(s):  
Acoustic Waves ◽  
Region Of Interest ◽  
Acoustic Microscopy ◽  
Scanning Acoustic Microscopy ◽  
Ball Bond ◽  
Pad Cratering ◽  
Non Destructive Evaluation ◽  
Layer Structures ◽  
Bond Pads ◽  
Non Destructive

Abstract GHz scanning acoustic microscopy (GHz-SAM) was successfully applied for non-destructive evaluation of the integrity of back end of line (BEOL) stacks located underneath wire-bond pads. The current study investigated two sample types of different IC processes. Realistic bonding defects were artificially induced into samples and the sensitivity of the acoustic GHz-microscope towards defects in BEOL systems was studied. Due to the low penetration depth in the acoustic GHz regime, a specific sample preparation was conducted in order to provide access to the region of interest. However, the preparation stopped several microns above the interfaces of interest, thus avoiding preparation artifacts in the critical region. Cratering related cracks in the bond pads have been imaged clearly by GHz-SAM. The morphology of the visualized defects corresponded well with the results obtained by a chemical cratering test. Moreover, delamination defects at the interface between ball and pad metallization were detected and successfully identified. The current paper demonstrates non-destructive inspection for bond-pad cratering and ball-bond delamination using highly focused acoustic waves in the GHz-band and thus illustrates the analysis of micron-sized defects in BEOL layer structures that are related to wire bonding or test needle imprints.

scholarly journals Quantifying Micro-mechanical Properties of Soft Biological Tissues with Scanning Acoustic Microscopy

2011 ◽  
Vol 1301 ◽  
Author(s):  
Xuegen Zhao ◽  
Steven Wilkinson ◽  
Riaz Akhtar ◽  
Michael J Sherratt ◽  
Rachel E B Watson ◽  
...  
Keyword(s):  
Acoustic Wave ◽  
Acoustic Waves ◽  
Wave Attenuation ◽  
Substrate Surface ◽  
Biological Tissues ◽  
Acoustic Microscopy ◽  
Scanning Acoustic Microscopy ◽  
Phase Information ◽  
Soft Biological Tissues ◽  
Acoustic Lens

ABSTRACTIn this study we have established a new approach to more accurately map acoustic wave speed (which is a measure of stiffness) within soft biological tissues at micrometer length scales using scanning acoustic microscopy. By using thin (5 μm thick) histological sections of human skin and porcine cartilage, this method exploits the phase information preserved in the interference between acoustic waves reflected from the substrate surface as well as internal reflections from the acoustic lens. A stack of images were taken with the focus point of acoustic lens positioned at or above the substrate surface, and processed pixel by pixel using custom software developed with LABVIEW and IMAQ (National Instruments) to extract phase information. Scanning parameters, such as acoustic wave frequency and gate position were optimized to get reasonable phase and lateral resolution. The contribution from substrate inclination or uneven scanning surface was removed prior to further processing. The wave attenuation was also obtained from these images.

The role of angular reflection in assessing elastic properties of bone by scanning acoustic microscopy

2014 ◽  
Vol 29 ◽  
pp. 438-450 ◽  
Author(s):  
S. Puchegger ◽  
D. Fix ◽  
C. Pilz-Allen ◽  
P. Roschger ◽  
P. Fratzl ◽  
...  
Keyword(s):  
Elastic Properties ◽  
Acoustic Microscopy ◽  
Scanning Acoustic Microscopy
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