Ultrasonic transducer array

  • US 5,311,095 A
  • Filed: 05/14/1992
  • Issued: 05/10/1994
  • Est. Priority Date: 05/14/1992
  • Status: Expired due to Term
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First Claim
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1. A two-dimensional array ultrasonic transducer for ultrasonic imaging comprising:

  • a ceramic connector having an upper surface, a lower surface and an array of connector pads formed in said ceramic connector for electrically connecting said upper surface to said lower surface;

    a mismatching layer of electrically conducting material connected to said upper surface of said ceramic connector;

    a piezoelectric transducer chip connected to said mismatching layer;

    a matching layer of electrically conducting material having an upper surface and a lower surface wherein said lower surface of said matching layer connected to said piezoelectric chip;

    slot means extending downward from said upper surface of said matching layer into said ceramic connector for dividing said matching layer, piezoelectric chip, mismatching layer and ceramic connector into a plurality of transducer elements of from about 0.1 mm to about 1 mm in width, from about 0.1 mm to about 20 mm in length and from about 0.1 mm to about 1 mm in height, said transducer elements being positioned in a two-dimensional array wherein each one of said plurality of transducer elements is electrically connected to a corresponding one of said connector pads;

    an uppermost layer of electrically conducting foil connected to said upper surface of said matching layer;

    redistribution means for redistributing the position of electrical connections for said array of transducer elements to increase the distance between electrical connections to a distance greater than that between individual connector pads of said array of connector pads; and

    voltage source means connected to said redistribution means for electrically exciting said array of transducer elements to produce an ultrasonic pulse of from about 1 to about 10 MHz.

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