MANUFACTURING PROCESS FOR PIEZOELECTRIC LAMINATE
DE602021045038T2Active Publication Date: 2025-12-24SUMITOMO CHEM CO LTD
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Patent Information
- Application Number
- DE602021045038
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2020-04-06
- Filing Date
- 2021-02-24
- Publication Date
- 2025-12-24
- Estimated Expiration
- 2041-02-24
AI Technical Summary
Technical Problem
Existing piezoelectric materials in ultrasonic sensors do not achieve optimal performance, necessitating a method to enhance the sensitivity and accuracy of ultrasonic sensors.
Method used
A piezoelectric stack is manufactured using a specific configuration of layers, including a substrate, bottom and top electrode films, and output and input piezoelectric films, with preferential crystal orientations and metal doping to improve piezoelectric constants and dielectric properties, and a protective film to prevent degradation.
Benefits of technology
The method results in a high-performance ultrasonic sensor with increased sensitivity and accuracy by optimizing the piezoelectric properties and reducing interference between output and input parts.
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