Ultrasonic transducer module
AssigneeQisda Corporation
InventorFu-Sheng Jiang
Life of this patent
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Abstract
An ultrasonic transducer module including a first electrode layer, a second electrode layer, a first piezoelectric material layer, a third electrode layer, a fourth electrode layer, a second piezoelectric material layer, and an insulation layer is provided. The first piezoelectric material layer is disposed between the first electrode layer and the second electrode layer. The second electrode layer is disposed between the first piezoelectric material layer and the third electrode layer. The second piezoelectric material layer is disposed between the third electrode layer and the fourth electrode layer. The insulation layer is disposed between the second electrode layer and the third electrode layer.
Claims18
An ultrasonic transducer module, comprising:
- a first electrode layer;
- a second electrode layer;
- a first piezoelectric material layer, disposed between the first electrode layer and the second electrode layer;
- a third electrode layer, wherein the second electrode layer is disposed between the first piezoelectric material layer and the third electrode layer;
- a fourth electrode layer;
- a second piezoelectric material layer, disposed between the third electrode layer and the fourth electrode layer;
- and
- an insulation layer, disposed between the second electrode layer and the third electrode layer,
- wherein, a wavelength of a sound wave corresponding to frequency corresponding to a thickness of the first piezoelectric material layer in the second piezoelectric material layer is 21, a thickness of the second piezoelectric material layer is T1, and ((2N−1)/4−⅛)×λ1<T1<((2N−1)/4+⅛)×λ1, where N is a positive integer,
- wherein a wavelength of a sound wave corresponding to the frequency corresponding to the thickness of the first piezoelectric material layer in the insulation layer is λ4, and a thickness of the insulation layer is less than one tenth of λ4.
An ultrasonic transducer module, comprising:
- a first electrode layer;
- a second electrode layer;
- a first piezoelectric material layer, disposed between the first electrode layer and the second electrode layer;
- a third electrode layer, wherein the second electrode layer is disposed between the first piezoelectric material layer and the third electrode layer;
- a fourth electrode layer;
- a second piezoelectric material layer, disposed between the third electrode layer and the fourth electrode layer;
- and
- an insulation layer, disposed between the second electrode layer and the third electrode layer,
- wherein an absolute value of a difference between a thickness of the first piezoelectric material layer and a thickness of the second piezoelectric material layer is less than 10% of the thickness of the first piezoelectric material layer, a width of the first piezoelectric material layer is d, a width of the second piezoelectric material layer is D, and d<4D/5,
- wherein a wavelength of a sound wave in the insulation layer corresponding to frequency corresponding to the thickness of the first piezoelectric material layer is λ4, and a thickness of the insulation layer is less than one tenth of λ4.
An ultrasonic transducer module, comprising:
- a first electrode layer;
- a second electrode layer;
- a first piezoelectric material layer, disposed between the first electrode layer and the second electrode layer;
- a third electrode layer, wherein the second electrode layer is disposed between the first piezoelectric material layer and the third electrode layer;
- a fourth electrode layer;
- a second piezoelectric material layer, disposed between the third electrode layer and the fourth electrode layer;
- and
- an insulation layer, disposed between the second electrode layer and the third electrode layer,
- wherein, an absolute value of a difference between a thickness of the first piezoelectric material layer and a thickness of the second piezoelectric material layer is less than 10% of the thickness of the first piezoelectric material layer, and a width of the first piezoelectric material layer is different from a width of the second piezoelectric material layer,
- wherein a wavelength of a sound wave corresponding to frequency corresponding to the thickness of the first piezoelectric material layer in the insulation layer is λ4, and a thickness of the insulation layer is less than one tenth of λ4.
Dependencies are inferred from the claim text.