Electroactive sound transducer foil having a structured surface
AssigneeRobert Bosch GmbH
InventorAndre GERLACH
Life of this patent
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Abstract
An electroactive sound transducer foil includes a composite foil made up of at least one carrier foil, at least one first and one second electrode, and at least one piezoelectric layer including an electroactive polymer, the surface of the sound transducer foil including a structuring having different slopes, and the slope of the sound transducer foil surface changing the sign at least twice.
Claims10
An electroactive sound transducer foil, comprising:
- a composite foil having:
- at least one carrier foil,
- at least one first electrode,
- at least one second electrode, and
- at least one piezoelectric layer including an electroactive polymer;
- and
- a surface that includes a structuring having different slopes, wherein a slope of the sound transducer foil surface changes sign at least twice.
The sound transducer foil as recited in claim 2, wherein the electroactive polymer includes PVDF.
A method for manufacturing an electroactive sound transducer having a structured sound transducer foil, comprising:
- producing a sound transducer foil from at least one carrier layer, at least one first and one second electrode layer, and at least one piezoelectric layer including an electroactive polymer;
- one of mechanically and chemically structuring the sound transducer foil, a surface of the sound transducer foil including areas having different slopes, and a slope of the sound transducer foil surface changing sign at least twice;
- and
- joining the structured sound transducer foil to one of a frame and a surface.
An electroactive sound transducer, producible using a method for manufacturing an electroactive sound transducer having a structured sound transducer foil, the method comprising:
- producing a sound transducer foil from at least one carrier layer, at least one first and one second electrode layer, and at least one piezoelectric layer including an electroactive polymer;
- one of mechanically and chemically structuring the sound transducer foil, a surface of the sound transducer foil including areas having different slopes, and a slope of the sound transducer foil surface changing sign at least twice;
- and
- joining the structured sound transducer foil to one of a frame and a surface.
A method of using an electroactive sound transducer including a microstructured surface foil that is made by a method for manufacturing an electroactive sound transducer having a structured sound transducer foil, the method comprising:
- producing a sound transducer foil from at least one carrier layer, at least one first and one second electrode layer, and at least one piezoelectric layer including an electroactive polymer;
- one of mechanically and chemically structuring the sound transducer foil, a surface of the sound transducer foil including areas having different slopes, and a slope of the sound transducer foil surface changing sign at least twice;
- and
- joining the structured sound transducer foil to one of a frame and a surface, the electroactive sound transducer being used as one of a microphone, a loudspeaker, a human machine interface (HMI), and a sensor.
Dependencies are inferred from the claim text.