Bismuth sodium titanate based lead-free ultrasonic transducer for microelectronics wirebonding applications

H. L.W. Chan, S. H. Choy, C. P. Chong, H. L. Li, P. C.K. Liu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

35 Citations (Scopus)


Bismuth sodium titanate based lead-free piezoelectric ceramic 0.885(Bi1/2Na1/2)TiO3-0.05(Bi1/2 K1/2)TiO3-0.015(Bi1/2Li1/2) TiO3-0.05BaTiO3 (BNKLBT-1.5) rings (OD = 12.7mm, ID = 5.1 mm and 2.3 mm thick) were fabricated and characterized. Four ceramic rings were sandwiched between front and back metal plates to form a pre-stressed piezoelectric sandwich transducer and used as the driving element of an ultrasonic wirebonding transducer and the performance of the transducer was evaluated. The BNKLBT-1.5 transducer, when fitted with titanium front and back plates, was found to have axial vibration comparable to that of PZT transducer thus showing that BNKLBT-1.5 has the potential to be used in fabricating lead-free ultrasonic wirebonding transducers.

Original languageEnglish
Pages (from-to)773-777
Number of pages5
JournalCeramics International
Issue number4
Publication statusPublished - 1 May 2008


  • C. Piezoelectric properties
  • D. BaTiO and titanates
  • Ultrasonic transducer

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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