Ultrasonic transducer electrical interface assembly
First Claim
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1. An ultrasonic transducer assembly, comprising:
- a first thin, disk-shaped ceramic ultrasonic transducer having a first side and a second side, said first side of said first ultrasonic transducer being coated with a first thin layer of conductive metal, said second side of said first ultrasonic transducer being coated with a second thin layer of conductive metal;
a first flex circuit segment having an exposed first conductive pad thereon;
a second flex circuit segment having an exposed second conductive pad thereon;
a first segment of conductive transfer tape having a first side and a second side, said first side of said first segment of conductive transfer tape being affixed to said first thin layer of conductive material on said first side of said first ultrasonic transducer, said second side of said first segment of conductive transfer tape being affixed to said first conductive pad; and
a second segment of conductive transfer tape having a first side and a second side, said first side of said second segment of conductive transfer tape being affixed to said second thin layer of conductive material on said second side of said first ultrasonic transducer, said second side of said second segment of conductive transfer tape being affixed to said second conductive pad.
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Abstract
An ultrasonic air-in-line detection system for use in detecting air bubbles in the fluid line of a disposable cassette mounted on a main pump unit is disclosed which utilizes an innovative construction used to attach electrical connectors to the ultrasonic transducers. Rather than wires, a thin flex circuit having a plurality of arms is used, with the flex circuit having a circular conductive pad located at the end of each arm. A circular segment of conductive transfer tape is used to attach each of the conductive pads to the thin layer of conductive metal located on each side of the ultrasonic transducer.
63 Citations
18 Claims
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1. An ultrasonic transducer assembly, comprising:
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a first thin, disk-shaped ceramic ultrasonic transducer having a first side and a second side, said first side of said first ultrasonic transducer being coated with a first thin layer of conductive metal, said second side of said first ultrasonic transducer being coated with a second thin layer of conductive metal; a first flex circuit segment having an exposed first conductive pad thereon; a second flex circuit segment having an exposed second conductive pad thereon; a first segment of conductive transfer tape having a first side and a second side, said first side of said first segment of conductive transfer tape being affixed to said first thin layer of conductive material on said first side of said first ultrasonic transducer, said second side of said first segment of conductive transfer tape being affixed to said first conductive pad; and a second segment of conductive transfer tape having a first side and a second side, said first side of said second segment of conductive transfer tape being affixed to said second thin layer of conductive material on said second side of said first ultrasonic transducer, said second side of said second segment of conductive transfer tape being affixed to said second conductive pad. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An ultrasonic transducer assembly, comprising:
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a thin, disk-shaped ceramic ultrasonic transmitter having a first side and a second side, said first side of said ultrasonic transmitter being coated with a first thin layer of conductive metal, said second side of said ultrasonic transmitter being coated with a second thin layer of conductive metal; a thin, disk-shaped ceramic ultrasonic receiver having a first side and a second side, said first side of said ultrasonic receiver being coated with a first thin layer of conductive metal, said second side of said ultrasonic receiver being coated with a second thin layer of conductive metal; a flex circuit including a first flex circuit segment, a second flex circuit segment, a third flex circuit segment, and a fourth flex circuit segment; an exposed first conductive pad on said first flex circuit segment; an exposed second conductive pad on said second flex circuit segment; an exposed third conductive pad on said third flex circuit segment; an exposed fourth conductive pad on said fourth flex circuit segment; first segment of conductive transfer tape having a first side and a second side, said first side of said first segment of conductive transfer tape being affixed to said first thin layer of conductive material on said first side of said ultrasonic transmitter, said second side of said first segment of conductive transfer tape being affixed to said first conductive pad; a second segment of conductive transfer tape having a first side and a second side, said first side of said second segment of conductive transfer tape being affixed to said second thin layer of conductive material on said second side of said ultrasonic transmitter, said second side of said second segment of conductive transfer tape being affixed to said second conductive pad; a third segment of conductive transfer tape having a first side and a second side, said first side of said third segment of conductive transfer tape being affixed to said first thin layer of conductive material on said first side of said ultrasonic receiver, said second side of said third segment of conductive transfer tape being affixed to said third conductive pad; and a fourth segment of conductive transfer tape having a first side and a second side, said first side of said fourth segment of conductive transfer tape being affixed to said second thin layer of conductive material on said second side of said ultrasonic receiver, said second side of said fourth segment of conductive transfer tape being affixed to said fourth conductive pad.
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17. An ultrasonic transducer assembly, comprising:
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a thin, disk-shaped ceramic ultrasonic transducer having a front side and a back side, said front side of said ultrasonic transducer being coated with a first thin layer of conductive metal, said back side of said ultrasonic transducer being coated with a second thin layer of conductive metal; a first flex circuit segment having an exposed first conductive pad thereon; a second flex circuit segment having an exposed second conductive pad thereon, said second flex circuit segment having an aperture therethrough which aperture extends through said second conductive pad; a first segment of conductive transfer tape having a first side and a second side, said first side of said first segment of conductive transfer tape being affixed to said first thin layer of conductive material on said first side of said ultrasonic transducer, said second side of said first segment of conductive transfer tape being affixed to said first conductive pad; and a second segment of conductive transfer tape having a first side and a second side, said second segment of conductive transfer tape having an aperture therethrough, said first side of said second segment of conductive transfer tape being affixed to said second thin layer of conductive material on said second side of said ultrasonic transducer, said second side of said second segment of conductive transfer tape being affixed to said second conductive pad.
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18. An ultrasonic transducer assembly, comprising:
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a thin, disk-shaped ceramic ultrasonic transducer having a first side and a second side; a first flex circuit segment having an exposed first conductive pad thereon; a second flex circuit segment having an exposed second conductive pad thereon; a first segment of conductive transfer tape having a first side and a second side, said first side of said first segment of conductive transfer tape being affixed to said first side of said ultrasonic transducer, said second side of said first segment of conductive transfer tape being affixed to said first conductive pad; and a second segment of conductive transfer tape having a first side and a second side, said first side of said second segment of conductive transfer tape being affixed to said second side of said ultrasonic transducer, said second side of said second segment of conductive transfer tape being affixed to said second conductive pad.
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Specification