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Acoustic time-frequency domain imaging.

Guang-Ming Zhang1, Derek R Braden, David M Harvey

  • 1General Engineering Research Institute, Liverpool John Moores University, Byrom Street, Liverpool L3 3AF, United Kingdom. g.zhang@ljmu.ac.uk

The Journal of the Acoustical Society of America
|November 30, 2010
PubMed
Summary
This summary is machine-generated.

This study introduces a new acoustic time-frequency domain imaging method using continuous wavelet transform. The technique enhances image details and contrast for microelectronic packages beyond conventional limits.

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Area of Science:

  • Acoustic Imaging
  • Signal Processing
  • Materials Science

Background:

  • Conventional acoustic micro imaging resolution is limited by acoustic wavelength.
  • Acoustic time-frequency domain imaging offers a potential solution to overcome wavelength limitations.

Purpose of the Study:

  • To investigate a continuous wavelet transform (CWT) based acoustic time-frequency domain imaging technique.
  • To evaluate the performance of this technique for imaging microelectronic packages.

Main Methods:

  • Implementation of a CWT-based acoustic time-frequency domain imaging method.
  • Experimental validation using 3D data from microelectronic packages.

Main Results:

  • The proposed technique successfully revealed finer image details compared to conventional methods.
  • Enhanced image contrast was observed using the time-frequency domain approach.
  • Demonstrated improved imaging capabilities for microelectronic package analysis.

Conclusions:

  • Continuous wavelet transform based acoustic time-frequency domain imaging is effective for microelectronic package inspection.
  • This method surpasses conventional time domain imaging in terms of resolution and contrast.
  • Offers a promising advancement for high-resolution acoustic imaging applications.