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US 4,672,591 AGranted
Ultrasonic transducer
AssigneeSiemens Aktiengesellschaft
InventorsFritz Breimesser, Gunther Grabner, Reinhard Lerch
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Abstract
An ultrasonic transducer comprises a support body, a piezoelectric layer of a material with a relatively high dielectric constant and high acoustic impedance, a first impedance matching layer and a second impedance matching layer (10). The first matching layer consists of silicon.
Claims25
An ultrasonic transducer comprising:
- a support body;
- a piezoelectric vibrator body attached to said support body, said vibrator body being made of a material having a high dielectric constant and a high acoustic impedance;
- a first matching layer at least indirectly attached to said vibrator body, said first matching layer consisting of silicon;
- and
- a second matching layer at least indirectly attached to said first matching layer on a side thereof opposite said vibrator body;
- said first and second matching layers being provided for acoustic matching of said piezoelectric vibrator to a medium contacting said second layer, said medium being selected from a group consisting of water and body tissue.
3 more elements
An ultrasonic transducer system comprising:
- a support body;
- a multiplicity of piezoelectric vibrator bodies attached to said support body, said vibrator bodies being made of a material having a high dielectric constant and a high acoustic impedance;
- first means at least indirectly attached to said vibrator bodies for performing an impedance matching function, said first means including at least one layer of silicon;
- and
- second means at least indirectly attached to said first means on a side thereof opposite said vibrator bodies for also performing an impedance matching function.
2 more elements
Dependencies are inferred from the claim text.