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Готові списки джерел за темами / High-Frequency acoustic microscopy

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Добірка наукової літератури з теми "High-Frequency acoustic microscopy"

Автор: Grafiati

Опубліковано: 11 січня 2025

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Статті в журналах з теми "High-Frequency acoustic microscopy"

1

Qiao, DongHai, ShunZhou Li, and ChengHao Wang. "High frequency acoustic microscopy with Fresnel zoom lens." Science in China Series G: Physics, Mechanics and Astronomy 50, no. 1 (February 2007): 41–52. http://dx.doi.org/10.1007/s11433-007-0002-5.

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2

Gailet, Jacqueline. "Scanning Acoustical Microscopy." Microscopy Today 2, no. 5 (August 1994): 26–28. http://dx.doi.org/10.1017/s155192950006630x.

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One of Olympus' not well known product in the American market is the UH3 Scanning Acoustic Microscope (SAM). This state of the art, highly versatile microscope has many applications from non-destructive imaging to biomedical analysis, to pharmaceutical applications to name a few areas of current industrial interest.The principle behind SAM is quite simple, and uses the basic physical laws of reflection. High frequency sound waves are mechanically produced by a piezoelectric crystal. A high voltage impulse spike starts the crystal vibrating at its preset resonant frequency emitting acoustical plane waves through a medium with a relatively high sound velocity such as sapphire. The waves are made to converge by a half-spherical lens at the bottom of the sapphire rod. The diameter of the lens is less than one millimeter and depends on the operating frequency. The lower the frequency, the larger is the diameter of the lens.

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3

Kumon, R. E., I. Bruno, B. Heartwell, and E. Maeva. "Breast tissue characterization with high‐frequency scanning acoustic microscopy." Journal of the Acoustical Society of America 115, no. 5 (May 2004): 2376. http://dx.doi.org/10.1121/1.4780120.

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4

Anastasiadis, Pavlos, and Pavel V. Zinin. "High-Frequency Time-Resolved Scanning Acoustic Microscopy for Biomedical Applications." Open Neuroimaging Journal 12, no. 1 (December 31, 2018): 69–85. http://dx.doi.org/10.2174/1874440001812010069.

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High-frequency focused ultrasound has emerged as a powerful modality for both biomedical imaging and elastography. It is gaining more attention due to its capability to outperform many other imaging modalities at a submicron resolution. Besides imaging, high-frequency ultrasound or acoustic biomicroscopy has been used in a wide range of applications to assess the elastic and mechanical properties at the tissue and single cell level. The interest in acoustic microscopy stems from the awareness of the relationship between biomechanical and the underlying biochemical processes in cells and the vast impact these interactions have on the onset and progression of disease. Furthermore, ultrasound biomicroscopy is characterized by its non-invasive and non-destructive approach. This, in turn, allows for spatiotemporal studies of dynamic processes without the employment of histochemistry that can compromise the integrity of the samples. Numerous techniques have been developed in the field of acoustic microscopy. This review paper discusses high-frequency ultrasound theory and applications for both imaging and elastography.

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5

Murray, Todd W., and Oluwaseyi Balogun. "A novel approach to high‐frequency laser‐based acoustic microscopy." Journal of the Acoustical Society of America 116, no. 4 (October 2004): 2617. http://dx.doi.org/10.1121/1.4785436.

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6

Brand, Sebastian, Eike C. Weiss, Robert M. Lemor, and Michael C. Kolios. "High Frequency Ultrasound Tissue Characterization and Acoustic Microscopy of Intracellular Changes." Ultrasound in Medicine & Biology 34, no. 9 (September 2008): 1396–407. http://dx.doi.org/10.1016/j.ultrasmedbio.2008.01.017.

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7

Korkh, Yu V., D. V. Perov, and A. B. Rinkevich. "Detection of subsurface microflaws using the high-frequency acoustic microscopy method." Russian Journal of Nondestructive Testing 51, no. 4 (April 2015): 198–209. http://dx.doi.org/10.1134/s1061830915040051.

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8

Mario, Poschgan, Maynollo Josef, and Inselsbacher Michael. "Inverted high frequency Scanning Acoustic Microscopy inspection of power semiconductor devices." Microelectronics Reliability 52, no. 9-10 (September 2012): 2115–19. http://dx.doi.org/10.1016/j.microrel.2012.06.064.

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9

Xu, Chunguang, Lei He, Dingguo Xiao, Pengzhi Ma, and Qiutao Wang. "A Novel High-Frequency Ultrasonic Approach for Evaluation of Homogeneity and Measurement of Sprayed Coating Thickness." Coatings 10, no. 7 (July 15, 2020): 676. http://dx.doi.org/10.3390/coatings10070676.

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A high-frequency ultrasonic approach for testing and evaluating sprayed coating thickness is proposed in this paper. This technique is based on the maximum frequency interval method of the magnitude spectrum of the acoustic pressure reflection coefficient that adopts Welch spectrum estimation. The acoustic propagation model was set up at normal incidence, and the relationship between the maximum frequency interval by the Welch power spectrum and the coating thickness was established to provide the principle for determining coating thickness. According to this principle, the thickness of a series of stainless steel coatings and ZrO2–Y2O3 (yttria-stabilized zirconia (YSZ)) coatings were detected by scanning acoustic microscopy. The relative error was less than 4% with the microscope method, indicating that the proposed ultrasonic method provides a reliable nondestructive way to measure sprayed coating thickness. The uniformity of the sprayed coating thickness could be intuitively observed from C-scan images by programming.

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10

Briggs, Andrew, and Oleg Kolosov. "Acoustic Microscopy for Imaging and Characterization." MRS Bulletin 21, no. 10 (October 1996): 30–35. http://dx.doi.org/10.1557/s0883769400031614.

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Acoustic microscopy is useful for characterizing with high spatial resolution the elastic structure and properties of an object. A range of techniques is now available for doing this, which enables the user to select the method and instrument that is most appropriate for a particular requirement. For imaging the interior of structures such as electronic-component packaging, an acoustic microscope operating at a relatively modest frequency can provide advanced nondestructive testing. For characterizing surface coatings and layers that may be only a fraction of a micrometer thick, higher frequency quantitative techniques are needed. For a given application, three questions should be asked at the outset: (1) What depth of material do I wish to include in my inspection? (2) Do I wish to image structures and/or defects, or do I wish to characterize elastic properties? (3) What is the minimum size of a defect or inhomogeneity that I wish to resolve or characterize (at a given depth) during my inspection? Selection of the appropriate technique will depend on the answers.

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Більше джерел

Дисертації з теми "High-Frequency acoustic microscopy"

1

Eavis, Joe. "An investigation of soft tissue ultrasonic microimaging." Thesis, University of Bristol, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.310800.

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2

Sannachi, Lakshmanan. "Investigation of anisotropic properties of musculoskeletal tissues by high frequency ultrasound." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2012. http://dx.doi.org/10.18452/16476.

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Knochen und Muskel sind die wichtigsten Gewebe im muskuloskelettalen System welche dem Körper die Bewegungen möglich machen. Beide Gewebetypen sind hochgradig strukturierter Extrazellulärmatrix zugrundegelegt, welche die mechanischen und biologischen Funktionen bestimmen. In dieser Studie wurden die räumliche Verteilung der anisotropen elastischen Eigenschaften und der Gewebemineralisation im humanen kortikalen Femur untersucht mit akustischer Mikroskopie und Synchrotron-µCT. Die homogenisierten elastischen Eigenschaften wurden aus einer Kombination der Porosität und der Gewebeelastizitätsmatrix mit Hilfe eines asymptotischen Homogenisierungsmodells ermittelt. Der Einfluss der Gewebemineralisierung und der Strukturparameter auf die mikroskopischen und mesoskopischen elastischen Koeffizienten wurde unter Berücksichtigung der anatomischen Position des Femurschaftes untersucht. Es wurde ein Modell entwickelt, mit welchem der intramuskuläre Fettgehalt des porcinen musculus longissimus nichtinvasiv mittels quantitativem Ultraschall und dessen spektraler Analyze des Echosignals bestimmt werden kann. Muskelspezifische Parameter wie Dämpfung, spectral slope, midband fit, apparent integrated backscatter und cepstrale Paramter wurden aus den RF-Signalen extrahiert. Die Einflüsse der Muskelkomposition und Strukturparameter auf die spektralen Ultraschallparameter wurden untersucht. Die akustischer Parameter werden durch die Muskelfaserorientierung beeinflusst und weisen höhere Werte parallel zur Faserlängsrichtung als senkrecht zur Faserorientierung auf. Die in dieser Studie gewonnenen detaillierten und lokal bestimmten Knochendaten können möglicherweise als Eingabeparameter für numerische 3D FE-Simulationen. Darüber hinaus kann die Untersuchung von Veränderungen der lokalen Gewebeanisotropie neue Einsichten in Studien über Knochenumbildung geben. Diese auf Gewebeebene bestimmten Daten von Muskelgewebe können in numerischen Simulationen von akustischer Rückstreuung genutzt werden um diagnostische Methoden und Geräte zu verbessern.
Bone and muscle are the most important tissues in the musculoskeletal system that gives the ability to move the body. Both tissues have the highly oriented underlying extracellular matrix structure for performing mechanical and biological functions. In this study, the spatial distribution of anisotropic elastic properties and tissue mineralization within a human femoral cortical bone shaft were investigated using scanning acoustic microscopy and synchrotron radiation µCT. The homogenized meoscopic elastic properties were determined by a combination of porosity and tissue elastic matrix using a asymptotic homogenization model. The impact on tissue mineralization and structural parameters of the microscopic and mesocopic elastic coefficients was analyzed with respect to the anatomical location of the femoral shaft. A model was developed to estimate intramuscular fat of porcine musculus longissimus non-invasively using a quantitative ultrasonic device by spectral analysis of ultrasonic echo signals. Muscle specific acoustic parameters, i.e. attenuation, spectral slope, midband fit, apparent integrated backscatter, and cepstral parameters were extracted from the measured RF echoes. The impact of muscle composition and structural properties on ultrasonic spectral parameters was analyzed. The ultrasound propagating parameters were affected by the muscle fiber orientation. The most dominant direction dependency was found for the attenuation. The detailed locally assessed bone data in this study may serve as a real-life input for numerical 3D FE simulation models. Moreover, the assessment of changes of local tissue anisotropy may provide new insights into the bone remodelling studies. The data provided at tissue level and investigated ultrasound backscattering from muscle tissue, can be used in numerical simulation FE models for acoustical backscattering from muscle for the further improvement of diagnostic methods and equipment.

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3

Saikouk, Hajar. "Imagerie par microscopie acoustique haute résolution en profondeur de la surface interne d'une gaine de crayon combustible de type REP." Thesis, Montpellier, 2018. http://www.theses.fr/2018MONTS101/document.

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Les crayons combustibles au sein des Réacteurs à Eau Pressurisée (REP) sont constitués de pastilles de céramique (UO2 ou (U-Pu)O2) empilées dans des gaines en alliage de zirconium, le Zircaloy. Avant l'irradiation, il existe un jeu de fabrication entre les pastilles et la gaine de l'ordre d'une centaine de microns. Au cours de l'irradiation, ce jeu est rapidement réduit ou totalement rattrapé du fait des différentes déformations que subissent les pastilles et la gaine. La connaissance de la nature de ce contact pastille-gaine à chaud, nécessaire pour comprendre les phénomènes et valider les modélisations de l'évolution de l'état de l’interface en fonction du taux de combustion, est accessible aujourd’hui exclusivement à partir de mesures destructives effectuées en laboratoire de haute activité, après retour à froid des combustibles. Pour obtenir un plus grand nombre d’informations sur des zones d’intérêt étendues, ou sur un tronçon de crayon avant refabrication pour ré-irradiation en réacteur expérimental, un moyen de caractérisation non destructif de l’interface pastille-gaine est nécessaire. C'est dans ce contexte que l'Institut d'Electronique et des Systèmes UMR CNRS 5214 de l'Université de Montpellier développe, dans le cadre d'une collaboration avec le Commissariat à l'Energie Atomique et aux Energies Alternatives, et en partenariat avec EDF et Framatome, un microscope acoustique adapté aux géométries cylindriques. Le travail mené au cours de cette thèse inclut la conception et l’adaptation d’une tête de mesure sur un banc prototype et la démonstration de la faisabilité de l’acquisition d’images haute résolution (quelques dizaines de microns) sur tubes de gaine, l’enjeu étant de conserver la focalisation sur l’ensemble des zones imagées sur un même tube de diamètre externe de l’ordre de 10 mm et de longueur de 100 à 500 mm. La difficulté à reproduire les conditions de contact pastille-gaine en laboratoire ont orienté le choix des échantillons simulants, élaborés à partir de tubes de gaine avec ou sans zircone et chargés localement de colle. Les acquisitions réalisées sur ces échantillons simulants montrent la capacité de la méthode à détecter les changements de structure de la surface interne de la gaine. La mesure est ainsi sensible à la présence d’une couche de zircone interne d’épaisseur de 10 $mu$m, et à la présence de matériau adhérent à l’intérieur du tube. Ces résultats montrent l’intérêt de poursuivre ces études, pour améliorer grâce à du traitement du signal l’interprétation des images avec pour objectif final l’adaptation de la méthode et sa qualification sur un banc sur crayon irradié
Pressurized Water Reactor (PWR) fuel rods are made of ceramic pellets (UO2,(U,Pu)O2 or gadolinium fuel) assembled in a zirconium alloy cladding tube. By design, an initial gap, filled with helium, exists between these two elements. However during irradiation this gap decreases gradually, on the one hand, owing to a variation in cladding diameter, due to creepdown caused by pressure from the coolant, and, on the other hand, increased pellet diameter, due to thermal expansion, and swelling. In hot conditions, during the second or third cycle of irradiation, the pellet/cladding gap is closed. However, during the return to cooler conditions, the gap can reopen. At a high burnup (generally beyond the 3rd cycle of irradiation) an inner zirconia layer of the order of 10 to 15 $mu$m is developed by oxidation leading to a chemical bonding between the pellet and the cladding. This bonding layer may contribute to a non-reopening of the pellet-cladding gap.Currently, only destructive examinations, after cutting fuel rods, allow the visualization of this area, however, they require a preliminary preparation of the samples in a hot cell. This limits the number of tests and measurements on the fuel rods. In this context, the Institute of Electronic and Systems of Montpellier University (IES - UMR CNRS 5214), in collaboration with the Alternative Energies and Atomic Energy Commission (CEA), Electricité de France (EDF) and Framatome, is developing a high frequency acoustic microscope adapted to the control and imaging of the pellet/cladding interface by taking into account the complexity of the structure's cladding which has a tubular form. Because the geometrical, chemical and mechanical nature of the contact interface is neither axially nor radially homogeneous, the ultrasonic system must allow the acquisition of 2D images of this interface by means of controlled displacements of the sample rod along both its axis and its circumference. The final objective of the designed acoustic microscope is to be introduced in hot cells

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Meignen, Pierre-Antoine. "Capteur ultrasonore multiélément dédié à la caractérisation quantitative haute résolution." Thesis, Montpellier, 2016. http://www.theses.fr/2016MONTT267/document.

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Les travaux présentés dans cette thèse s’appliquent à la caractérisation de propriétés mécaniques par la microscopie acoustique. Ils décrivent un capteur focalisé innovant qui autorise à la fois une topographie et une imagerie quantitative d’un matériau élastique. L’innovation consiste en la séparation des différents modes de propagation d’un matériau excité par une sonde focalisée multiélément. La mesure par temps de vol de la vitesse de propagation des modes de surfaces de matériaux élastiques et anisotropes offre une possibilité de quantification du module caractérisant l’élasticité : le module de Young. Le dimensionnement de la sonde multiélément qui est décrit ici est rendu possible grâce au développement d’un modèle de champs acoustiques permettant d’anticiper le champ rayonné par chaque élément. Un deuxième modèle traitant de l’étude temporel des signaux reçus par la sonde focalisée est aussi présenté pour vérifier le comportement discriminant de la sonde des différentes ondes pouvant se propager. La mesure de propriétés mécaniques par la sonde focalisée est appliquée à différents échantillons et propose des résultats cohérents avec une grande sensibilité. La possibilité de réaliser des images de propriétés mécaniques est ainsi démontrée. D’abord adaptée pour des fréquences de l’ordre de la trentaine de mégahertz, cette sonde possède un nombre limité d’éléments pour assurer une simplicité de conception et de fabrication permettant par la suite une miniaturisation du capteur pour atteindre des fréquences proches du gigahertz
The work presented in this thesis is applied to the characterization of mechanical properties by acoustic microscopy. It describes an innovative focused sensor that enables both topography and quantitative imaging of an elastic material. The innovation consists in the separation of the different propagation modes of a material excited by a focused multielement probe. Measuring the surface mode propagation velocity of elastic and anisotropic materials thanks to their time of flight provides a possibility of quantifying the module characterizing the elasticity: the Young's modulus. The dimensions of the multielement probe are described here and rely on an acoustic field model developed to anticipate the field radiated by each element. A second model studies the temporal behaviour of the focused probe and also verifies the discrimination of the different waves that propagate. The measurement of mechanical properties by the multielement probe is applied to different samples and provides consistent results with high sensitivity. The ability to produce images of mechanical properties is thus demonstrated. First suitable for frequencies near thirty megahertz, this sensor has a limited number of elements to ensure a simplicity of design and manufacture for a subsequent miniaturization of the sensor to achieve frequencies near the gigahertz

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5

Ezziani, Youness. "Caractérisatiοn ultrasοnοre haute résοlutiοn d’un film adhésif dans un assemblage aérοnautique". Electronic Thesis or Diss., Normandie, 2024. http://www.theses.fr/2024NORMLH14.

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Cette thèse s'intéresse à la caractérisation des propriétés d'un film adhésif dans un assemblage aéronautique tricouche de type Titane-Adhésif-Composite, représentatif de l’aube de fan du moteur LEAP. L'objectif principal est de déterminer avec précision l'épaisseur du film adhésif, ses propriétés mécaniques, ainsi que la qualité d’adhésion qu’il assure entre le titane et le composite, en utilisant des méthodes ultrasonores non destructives à haute fréquence, et donc à haute résolution. Cependant, cette détermination fine de l'épaisseur du joint adhésif et de ses propriétés mécaniques, des indicateurs clés de la qualité de l'adhésion, reste un verrou technologique non encore résolu dans l'industrie aéronautique en raison du contraste d'impédance très marqué dans ce type de structure : fort entre le titane et l’adhésif, et faible entre l’adhésif et le composite. L’enjeu de cette thèse est donc de relever le défi de la détection de l’écho de fond à l’interface Adhésif-Composite à haute fréquence. Ce défi est d'autant plus difficile que les hautes fréquences s'accompagnent d'une atténuation importante. Il est donc essentiel de trouver un compromis optimal entre une fréquence suffisamment élevée pour adapter la longueur d'onde à l'épaisseur de l'adhésif, mais pas trop élevée pour détecter les échos de fond, notamment l’écho de fond à l’interface Adhésif-Composite, avec une amplitude suffisamment exploitable. Dans un premier temps, une étude qualitative a été menée sur six échantillons tricouches (TA6V-Epoxy-Composite, fournis par Safran) à l’aide du microscope acoustique à balayage (SAM) PVA TEPLA 301, permettant la mesure précise de l’épaisseur du film adhésif époxy et l’évaluation de la qualité d’adhésion, en analysant l’écho de fond du film d’époxy, et en examinant la quantité d’énergie transmise à la couche composite en exploitant l’imagerie X-scan. Différents niveaux d'adhésion ont été identifiés : fort, moyen et faible. Par la suite, une étude quantitative a été réalisée à l’aide d’un modèle aux interphases, résolu par la méthode des séries de Debye, qui a permis de quantifier les niveaux d’adhésion de ces échantillons : un fort niveau d’adhésion pour l’échantillon 2 avec des coefficients d’adhésion (α = 1 et β = 1), un faible niveau d’adhésion pour l’échantillon 1 avec (α = 1 et β = 10⁻³), et un niveau d’adhésion moyen pour les échantillons 3, 4, 5 et 6 avec α = 1 et des valeurs de β intermédiaires
This thesis focuses on the characterization of the properties of an adhesive film in a three-layer aeronautical assembly of the Titanium-Adhesive-Composite type, representative of the fan blade in the LEAP engine. The main objective is to accurately determine the thickness of the adhesive film, its mechanical properties, and the quality of adhesion it provides between the titanium and the composite, using high-frequency, and therefore high-resolution, non-destructive ultrasonic methods. However, this precise determination of the thickness of the bonded joint and its mechanical properties, which are key indicators of the quality of the bond, remains an unresolved technological challenge in the aeronautical industry due to the significant impedance contrast in this type of structure : high between the titanium and the adhesive, and low between the adhesive and the composite. Therefore, the challenge of this thesis is to address the detection of the background echo at the Adhesive-Composite interface at high frequency. This challenge is further complicated by the significant attenuation associated with high frequencies. It is essential to find an optimal compromise between a frequency high enough to match the wavelength to the thickness of the adhesive, but not too high, in order to detect the background echoes, particularly the background echo at the Adhesive-Composite interface, with a sufficiently exploitable amplitude. Initially, a qualitative study was conducted on six three-layer samples (TA6V-Epoxy-Composite, provided by Safran) using the PVA TEPLA 301 scanning acoustic microscope (SAM), which allows the precise measurement of the epoxy adhesive film's thickness and the assessment of the quality of the adhesion by analyzing the background echo of the epoxy film and examining the amount of energy transmitted to the composite layer using X-scan imaging. Different levels of adhesion were identified : strong, medium, and weak. A quantitative study was then carried out using an interphase model solved by the Debye series method, which allowed for the quantification of the adhesion levels in these samples: a strong adhesion level for sample 2 with adhesion coefficients (α = 1 and β = 1), a weak adhesion level for sample 1 with (α = 1 and β = 10⁻³), and a medium adhesion level for samples 3, 4, 5 and 6 with α = 1 and intermediate β values

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Частини книг з теми "High-Frequency acoustic microscopy"

1

Lethiecq, Marc, Marceau Berson, Guy Feuillard, and Frederic Patat. "Principles and Applications of High-Frequency Medical Imaging." In Advances in Acoustic Microscopy, 39–102. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4615-5851-4_2.

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2

Vogt, Michael, and Helmut Ermert. "High-Frequency Ultrasonic Systems for High-Resolution Ranging and Imaging." In Advances in Acoustic Microscopy and High Resolution Imaging, 93–123. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2013. http://dx.doi.org/10.1002/9783527655304.ch5.

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3

Maslov, Konstantin I., Roman Gr Maev, Leonid M. Dorozhkin, and Valery S. Doroshenko. "High-Frequency Focusing Transducer for Acoustic Microscope." In Acoustical Imaging, 689–94. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4419-8772-3_112.

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Тези доповідей конференцій з теми "High-Frequency acoustic microscopy"

1

Yin, Q. R., H. F. Yu, H. R. Zeng, G. R. Li, and A. L. Ding. "High Resolution Acoustic Microscopy with Low Frequency and Its Applications in Analysis of Ferroelectrics." In ISTFA 2005. ASM International, 2005. http://dx.doi.org/10.31399/asm.cp.istfa2005p0228.

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Abstract Nondestructive observation of domain structure of ferroelectrics, dynamic behavior under external field and related phenomena is becoming significant. As a nondestructive and subsurface characterizing technique, the authors developed acoustic microscopy based on a commercial scanning probe microscope for direct observation of local ferroelectricity, elasticity and defects on several inorganic functional materials, transparent PLZT ceramics, relax-based PMN-PT crystal and lead-free bismuth titanate ceramics without any special processing (polishing or etching) to the sample. The direct observation is particularly useful and convenient for analyzing ferroelectrics/semiconductor integrated material and devices. The excitation frequency is in the range of several kHz to decades of kHz, which is much lower than that of the traditional acoustic imaging techniques. But several applications of scanning probe acoustic microscope (SPAM) involving ferroelectric samples with the resolution of 10nm were obtained. The expanding scope of application for SPAM shows exciting possibilities for non-destructive analyses in the microelectrics industry.

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2

Miyasaka, Chiaki, and Bernhard R. Tittmann. "High-power acoustic insult to living cultured cells as studied by high-frequency scanning acoustic microscopy." In NDE For Health Monitoring and Diagnostics, edited by Tribikram Kundu. SPIE, 2002. http://dx.doi.org/10.1117/12.469895.

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3

van Es, Maarten H., Benoit A. I. Quesson, Abbas Mohtashami, Daniele Piras, Kodai Hatakeyama, Laurent Fillinger, and Paul L. M. J. van Neer. "High resolution acoustic metrology by combining high GHZ frequency ultrasound and scanning probe microscopy." In Metrology, Inspection, and Process Control for Microlithography XXXIV, edited by Ofer Adan and John C. Robinson. SPIE, 2020. http://dx.doi.org/10.1117/12.2552030.

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Fei, Dong. "Imaging Defects in Thin DLC Coatings Using High Frequency Scanning Acoustic Microscopy." In QUANTITATIVE NONDESTRUCTIVE EVALUATION. AIP, 2004. http://dx.doi.org/10.1063/1.1711724.

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Kim, Jeong Nyeon, Richard L. Tutwiler, and Judith A. Todd. "Practical Design of a High Frequency Phased-Array Acoustic Microscope Probe: A Preliminary Study." In ASME 2017 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/pvp2017-65270.

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Scanning acoustic microscopy (SAM) has been a well-recognized tool for both visualization and quantitative evaluation of materials at the microscale since its invention in 1974. While there have been multiple advances in SAM over the past four decades, some issues still remain to be addressed. First, the measurement speed is limited by the mechanical movement of the acoustic lens. Second, a single element transducer acoustic lens only delivers a predetermined beam pattern for a fixed focal length and incident angle, thereby limiting control of the inspection beam. Here, we propose to develop a phased-array probe as an alternative to overcome these issues. Preliminary studies to design a practical high frequency phased-array acoustic microscope probe were explored. A linear phased-array, comprising 32 elements and operating at 5 MHz, was modeled using PZFlex, a finite-element method software. This phased-array system was characterized in terms of electrical input impedance response, pulse-echo and impulse response, surface displacement profiles, mode shapes, and beam profiles. The results are presented in this paper.

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Brand, Sebastian, Matthias Petzold, Peter Czurratis, and Peter Hoffrogge. "Extending Acoustic Microscopy for Comprehensive Failure Analysis Applications." In ISTFA 2010. ASM International, 2010. http://dx.doi.org/10.31399/asm.cp.istfa2010p0084.

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Abstract In industrial manufacturing of microelectronic components, non-destructive failure analysis methods are required for either quality control or for providing a rapid fault isolation and defect localization prior to detailed investigations requiring target preparation. Scanning acoustic microscopy (SAM) is a powerful tool enabling the inspection of internal structures in optically opaque materials non-destructively. In addition, depth specific information can be employed for two- and three-dimensional internal imaging without the need of time consuming tomographic scan procedures. The resolution achievable by acoustic microscopy is depending on parameters of both the test equipment and the sample under investigation. However, if applying acoustic microscopy for pure intensity imaging most of its potential remains unused. The aim of the current work was the development of a comprehensive analysis toolbox for extending the application of SAM by employing its full potential. Thus, typical case examples representing different fields of application were considered ranging from high density interconnect flip-chip devices over wafer-bonded components to solder tape connectors of a photovoltaic (PV) solar panel. The progress achieved during this work can be split into three categories: Signal Analysis and Parametric Imaging (SA-PI), Signal Analysis and Defect Evaluation (SA-DE) and Image Processing and Resolution Enhancement (IP-RE). Data acquisition was performed using a commercially available scanning acoustic microscope equipped with several ultrasonic transducers covering the frequency range from 15 MHz to 175 MHz. The acoustic data recorded were subjected to sophisticated algorithms operating in time-, frequency- and spatial domain for performing signal- and image analysis. In all three of the presented applications acoustic microscopy combined with signal- and image processing algorithms proved to be a powerful tool for non-destructive inspection.

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Augereau, Franck, Didier Laux, Gilles Despaux, and Sylvain Peuget. "Aging detection for simulated nuclear glasses using Au ion-implantation by high frequency acoustic microscopy." In International Congress on Ultrasonics. Vienna University of Technology, 2007. http://dx.doi.org/10.3728/icultrasonics.2007.vienna.1810_augereau.

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Tillmann, W., F. Walther, W. Luo, M. Haack, J. Nellesen, and M. Knyazeva. "In Situ Acoustic Monitoring of Thermal Spray Process Using High-Frequency Impulse Measurements." In ITSC2017, edited by A. Agarwal, G. Bolelli, A. Concustell, Y. C. Lau, A. McDonald, F. L. Toma, E. Turunen, and C. A. Widener. DVS Media GmbH, 2017. http://dx.doi.org/10.31399/asm.cp.itsc2017p0072.

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Abstract In order to guarantee their protective function, thermal sprayings must be free from cracks, which expose the substrate surface to e.g. corrosive media. Cracks in thermal sprayings are usually formed because of tensile residual stresses. Most commonly, the crack occurrence is determined after the thermal spraying process by examination of metallographic cross-sections of the coating. Recent efforts focus on in situ monitoring of crack formation by means of acoustic emission analysis. However, the acoustic signals related to crack propagation can be absorbed by the noise of the thermal spraying process. In this work, a high-frequency impulse measurement technique was applied to separate different acoustic sources by visualizing the characteristic signal of crack formation via quasi-real-time Fourier analysis. The investigations were carried out on a twin wire arc spraying process, utilizing FeCrBSi as a coating material. The impact of the process parameters on the acoustic emission spectrum was studied. Acoustic emission analysis enables to obtain global and integral information on the formed cracks. The coating morphology as well as coating defects were inspected using light microscopy on metallographic cross-sections. Additionally, the resulting crack patterns were imaged in 3D by means of X-ray micro-tomography.

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Phommahaxay, Alain, Ingrid De Wolf, Peter Hoffrogge, Sebastian Brand, Peter Czurratis, Harold Philipsen, Yann Civale, et al. "High frequency scanning acoustic microscopy applied to 3D integrated process: Void detection in Through Silicon Vias." In 2013 IEEE 63rd Electronic Components and Technology Conference (ECTC). IEEE, 2013. http://dx.doi.org/10.1109/ectc.2013.6575576.

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Marchetti, M., D. Laux, F. Cappia, M. Laurie, P. Van Uffelen, V. V. Rondinella, and G. Despaux. "High frequency acoustic microscopy for the determination of porosity and Young's modulus in high burnup uranium dioxide nuclear fuel." In 2015 4th International Conference on Advancements in Nuclear Instrumentation Measurement Methods and their Applications (ANIMMA). IEEE, 2015. http://dx.doi.org/10.1109/animma.2015.7465598.

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