Ultrasonic Device Vibrator Protection and Vibration Loss Reduction
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Solution Overview
Problem
Existing ultrasonic devices suffer from significant ultrasonic vibration loss and accuracy deterioration due to complex configurations involving multiple transmission members, which compromise the reliability and efficiency of ultrasonic wave transmission and reception.
Innovation Solution
The ultrasonic device incorporates an element substrate with a diaphragm and vibrator, a protective substrate with a second electrode, a through hole substrate, and a container, where the vibrator is positioned to overlap the through hole, surrounded by the substrates and a jointing member, with the second electrode on the opposite surface of the protective substrate, simplifying the configuration and preventing vibration-induced damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple transmission members are used to protect the vibrator, then reliability is improved, but ultrasonic vibration loss increases and accuracy deteriorates
Solution Approach 1:
The patent extracts and removes the first transmission member from the configuration, retaining only the protective substrate as a single protective element. This reduction from multiple transmission members to one protective layer directly reduces ultrasonic vibration loss while maintaining the essential protection function of the vibrator.
2Reliability
If multiple transmission members are used to protect the vibrator, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent simplifies the device configuration by extracting and removing the first transmission member, reducing the number of components from multiple transmission members to a single protective substrate. This directly reduces device complexity while preserving the core protection functionality.
3Reliability
If the second electrode is provided on the jointing surface side, then electrical coupling is achieved, but vibration-induced damage occurs
Solution Approach 1:
The patent inverts the conventional arrangement by placing the second electrode on the opposite surface of the protective substrate from the jointing surface, rather than on the jointing surface side. This positional inversion protects the electrode from vibration-induced damage while maintaining electrical coupling functionality through the protective substrate.
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 design enhances the reliability and accuracy of ultrasonic wave transmission and reception by protecting the vibrator, reducing vibration-induced errors, and simplifying the device configuration while maintaining efficient ultrasonic wave transmission and reception.
Implementation Method 1
a vibrator provided at the diaphragm... transmits ultrasonic vibrations transmitted from the first transmission member
Data Source
AI summary
An ultrasonic device including: an element substrate including a diaphragm, a vibrator provided at the diaphragm, and a first electrode electrically coupled to the vibrator; a protective substrate that is provided at a position facing the element substrate and that includes a second electrode coupled to the first electrode at a position facing the first electrode; a through hole substrate that has a through hole and that faces the element substrate; and a container including a mounting surface on which the protective substrate is disposed, in which the vibrator is provided at a position overlapping the through hole when viewed from a facing direction in which the element substrate and the protective substrate face each other, and is surrounded by the element substrate, the protective substrate, and a jointing member, and the second electrode is provided at an opposite-side surface of the protective substrate from a jointing surface jointed with the mounting surface.