Method and apparatus for measuring acoustic wave velocity using impulse response

1995 ◽  
Vol 98 (1) ◽  
pp. 28-28
Author(s):  
John A. Kleppe
Keyword(s):  
Acoustic Wave ◽  
Impulse Response ◽  
Wave Velocity ◽  
Acoustic Wave Velocity

DETERMINATION OF PHYSICAL RESPONSE IN (Mo/AlN) SAW DEVICES

2013 ◽  
Vol 20 (02) ◽  
pp. 1350017 ◽  
Author(s):  
J. C. CAICEDO ◽  
J. A. PÉREZ ◽  
H. H. CAICEDO ◽  
H. RIASCOS
Keyword(s):  
Optical Properties ◽  
Acoustic Wave ◽  
Wave Velocity ◽  
Photoelectron Spectroscopy ◽  
Morphological Properties ◽  
Experimental Conditions ◽  
Acoustic Wave Velocity ◽  
Saw Devices ◽  
Physical Response ◽  
Aln Buffer

This paper describes the experimental conditions in surface acoustic wave (SAW) designed on aluminum nitride (AlN) films grown on Si3N4 substrates by using pulsed laser deposition. Moreover it was studied the dependency of optical properties with temperature of deposition. The thickness, measured by profilometry technology, was 150 nm for all films. Moreover, SAW devices with a Mo/AlN/Si3N4 configuration were fabricated employing AlN buffer and Mo Channel. The morphology and composition of the films were studied using atomic force microscopy (AFM), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy analysis (XPS), respectively. The optical reflectance spectra and color coordinates of the films were obtained by optical spectral reflectometry technique in the range of 400–900 cm-1. In this work, a clear dependence in morphological properties, optical properties, frequency response and acoustic wave velocity as function of applied deposition temperature was found. It was also observed a reduction in reflectance of about 10% and an increase of acoustic wave velocity of about 1.2% when the temperature was increased from 200°C to 630°C.

Velocity‐depth ambiguity in the dipping reflector case

Geophysics ◽  
1997 ◽  
Vol 62 (5) ◽  
pp. 1583-1585 ◽  
Author(s):  
Brijpal S. Rathor
Keyword(s):  
Acoustic Wave ◽  
Wave Velocity ◽  
Seismic Data ◽  
Seismic Events ◽  
Velocity Analysis ◽  
Vital Parameter ◽  
Acoustic Wave Velocity ◽  
Analysis Methods

Seismic or acoustic wave velocity is a vital parameter for processing and interpretation of seismic data. Various velocity analysis methods, using traveltime moveout of seismic events, have been described in literature. In certain cases, these methods provide ambiguous results. Hence, there is a need to investigate velocity‐depth ambiguity in such cases.

Temperature dependence of surface acoustic wave velocity in thin metal films

1991 ◽  
Vol 202 (1) ◽  
pp. 171-179 ◽  
Author(s):  
Shu-Yi Zhang ◽  
Liang Guo ◽  
An Hu ◽  
Qiu-Shi Gao ◽  
Zhong-Nan Lu
Keyword(s):  
Acoustic Wave ◽  
Temperature Dependence ◽  
Surface Acoustic Wave ◽  
Wave Velocity ◽  
Metal Films ◽  
Thin Metal ◽  
Thin Metal Films ◽  
Acoustic Wave Velocity

Effect of metallisation on surface acoustic wave velocity in GaN-on-sapphire structures

2000 ◽  
Vol 36 (6) ◽  
pp. 591 ◽  
Author(s):  
D. Čiplys ◽  
R. Rimeika ◽  
R. Gaska ◽  
M.S. Shur ◽  
A. Khan ◽  
...  
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Wave Velocity ◽  
Acoustic Wave Velocity
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