NDLI: Ultrafine scale piezoelectric composite materials for high frequency ultrasonic imaging arrays

Content Provider	IEEE Xplore Digital Library
Author	Pazol, B.G. Bowen, L.J. Gentilman, R.L. Pham, H.T. Serwatka, W.J. Oakley, C.G. Dietz, D.R.
Copyright Year	1995
Description	Author affiliation: Materials Systems Inc., Littleton, MA, USA (Pazol, B.G.)
Abstract	Intravascular and endoscopic acoustic imaging typically require high ultrasonic operating frequencies, over 7 MHz. At these frequencies the ceramic transducer dimensions become very small; pitches in the order of 20 to 80 /spl mu/m are needed. Moreover, such arrays must be compatible with existing interconnect approaches and be fabricated at low cost. These piezoelectric transducer array requirements severely challenge the ability of conventional PZT ceramic technologies in terms of cost-effective fabrication. To meet the demand for such transducer shapes, MSI has developed a net shape ceramic injection molding process for production of piezoelectric ceramics in complex shapes. Using this technique, MSI has produced ultrafine scale 2-2 piezocomposite arrays having PZT elements less than 25 /spl mu/m wide and pitches under 50 /spl mu/m. This paper reviews recent advances in the net shape molding technology, and compares the characteristics of an injection molded 7 MHz 2-2 configuration with that of a similar array prepared by conventional dicing.
Starting Page	1263
Ending Page	1268
File Size	388436
Page Count	6
File Format	PDF
ISBN	0780329406
ISSN	10510117
DOI	10.1109/ULTSYM.1995.495787
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-11-07
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Composite materials Ceramics Shape Piezoelectric transducers Frequency Acoustic imaging Acoustic transducers Ultrasonic transducers Costs Fabrication
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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