Ultrasonic Transducer Element Package with Segmented Substrates
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Solution Overview
Problem
Existing ultrasonic transducer element designs face challenges in narrowing the focal point of the ultrasonic beam, which requires broadening the interval between transducer elements, leading to unnecessary substrate regions that do not contribute to wave transmission or reception.
Innovation Solution
The design incorporates a first and second substrate with aligned openings, supported by a support body, allowing for the configuration of ultrasonic transducer elements in a manner that adjusts the beam width by spacing the substrates orthogonally, thereby optimizing the focal point without using unnecessary substrate material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the interval between ultrasonic transducer elements is broadened to narrow the focal point of the ultrasonic beam, then the beam width at the focal point is reduced, but a useless substrate region is created that does not contribute to transmitting or receiving ultrasonic waves
Solution Approach 1:
The substrate is divided into multiple separate substrates (first substrate, second substrate, etc.) that are arranged with spaces between them. Each substrate contains openings for transducer elements, and the segmentation allows the intervals between elements to be broadened while eliminating useless substrate regions by removing material between the separate substrates.
Solution Approach 2:
The solution transitions from a single-plane substrate arrangement to a multi-layer configuration where substrates are stacked in the thickness direction. This dimensional change allows transducer elements to be positioned with broader intervals in the scan direction while utilizing the third dimension (thickness) to accommodate multiple substrate layers, thereby eliminating wasted substrate material.
2Measurement precision
If multiple substrates are arranged with spaces between them to adjust beam width, then the focal point control is improved, but the device structure becomes more complex
Solution Approach 1:
Multiple substrates are combined and integrated onto a single support body. The support body provides a unified structure that holds multiple substrates in predetermined positions, merging the functions of multiple substrates into a coordinated assembly that achieves precise focal point control without requiring complex individual substrate structures.
Solution Approach 2:
A support body is introduced as an intermediary component that simplifies the overall structure by providing a common platform for mounting multiple substrates. The support body meditates between the multiple substrates, establishing their relative positions and reducing the complexity of inter-substrate positioning and alignment.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration allows for flexible adjustment of the ultrasonic beam's focal length, reduces substrate material usage, and enhances the signal-to-noise ratio by minimizing cross-talk through the use of an acoustic matching layer and a less rigid adhesive layer.
Implementation Method 1
generating vibration involves forming a piezoelectric body at each of the vibrating films disposed on the substrate
Implementation Method 2
Ultrasonic waves are generated in response to vibration of the vibration film at each of the ultrasonic transducer elements
Data Source
AI summary
An ultrasonic transducer element package includes a first substrate, a second substrate, a support body, and first and second ultrasonic transducers. The first substrate has first and second openings that are aligned in a first direction. The second substrate has a third and fourth openings that are aligned in the first direction. The support body supports the first and second substrates. The first and second substrates are aligned in a second direction that intersects with the first direction, with a space therebetween. The first and Second ultrasonic transducer elements are configured at the first and second openings respectively.