Effect of electrode pattern on the outputs of piezosensors for wire bonding process control

S. S. Chiu, H. L.W. Chan, Siu Wing Or, Y. M. Cheung, P. C.K. Liu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

23 Citations (Scopus)


A polyvinylidene fluoride (PVDF) piezosensor was installed as an integral part of an ultrasonic wire-bonding transducer for measuring bonding parameters, such as impact force, ultrasonic amplitude, and bond time. Four different types of electrode patterns were used to optimize the sensor outputs. When the ring-shaped electrode of the sensor was subdivided into four different sections, namely the top, bottom, left, and right sections, different output signals were observed during the wire-bonding process. The top section of the sensor was more sensitive to the impact force while the left and right sections could track the changes in the ultrasonic amplitude proficiently. This sensor has good potential to be used in an in situ automatic wire-bonding process-control system.
Original languageEnglish
Pages (from-to)121-126
Number of pages6
JournalMaterials Science and Engineering B: Solid-State Materials for Advanced Technology
Issue number1-3
Publication statusPublished - 25 May 2003
EventAdvanced Electronic-ceramic Materials. Proceedings of the 8th IUMRS-ICEM 2002 - Xi'an, China
Duration: 10 Jun 200214 Jun 2002


  • Bonding quality monitoring
  • Piezoelectric sensors
  • Process control
  • Ultrasonic wire bonding

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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