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Multi-step Variable Height Photolithography for Valved Multilayer Microfluidic Devices
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Micro-stereolithography as a transducer design method.

K S Ho1, R J Bradley, D R Billson

  • 1School of Engineering, University of Warwick, Coventry CV4 7AL, United Kingdom.

Ultrasonics
|November 30, 2007
PubMed
Summary

Micro-stereolithography enables rapid prototyping of electromagnetic acoustic transducer (EMAT) coils. This technique facilitates the creation of meander-line and spiral EMATs for ultrasonic imaging of metallic objects.

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Nondestructive Testing

Background:

  • Rapid prototyping techniques offer advantages in fabricating complex geometries.
  • Electromagnetic Acoustic Transducers (EMATs) are crucial for non-contact ultrasonic testing.
  • Micro-stereolithography presents a potential method for EMAT coil fabrication.

Purpose of the Study:

  • To explore the application of micro-stereolithography for manufacturing EMAT coils.
  • To demonstrate the fabrication of both meander-line and spiral EMAT coil configurations.
  • To evaluate the imaging capabilities of micro-stereolithography-produced EMATs.

Main Methods:

  • Micro-stereolithography was employed for rapid prototyping of EMAT coils.
  • Meander-line and spiral coil designs were manufactured using this technique.

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  • Synthetic Aperture Focussing Technique (SAFT) was applied to ultrasonic data.

    • Main Results:

    • Successfully fabricated EMAT coils with distinct meander-line and spiral geometries.
    • Ultrasonic signals from the fabricated EMATs were acquired.
    • SAFT enabled the reconstruction of images of metallic objects using data from the EMATs.

    Conclusions:

    • Micro-stereolithography is a viable technique for producing EMAT coils.
    • The fabricated EMATs, when used with SAFT, can achieve ultrasonic imaging.
    • This fabrication method holds promise for advancing EMAT technology for NDT applications.