Vibrator Device Protrusion Stops Substrate Gap Variation
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Solution Overview
Problem
Existing vibrator devices face challenges in maintaining consistent capacitance between electrode lines on a relay substrate and wiring lines due to variations in adhesive thickness, making it difficult to design for these capacitances.
Innovation Solution
The vibrator device incorporates protrusions on the vibrating body that extend beyond the coupling electrodes, contacting the package surface, which acts as a stopper to maintain a constant distance between the substrate and the package, thereby stabilizing capacitances between electrodes and wiring lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If adhesive is used to fix the relay substrate to the package, then the substrate can be mounted, but the distance between the substrate and package varies due to adhesive thickness variation, causing capacitance variations
Solution Approach 1:
The patent applies preliminary action by forming protrusions on the relay substrate before mounting that extend beyond the coupling electrodes. These protrusions make contact with the package surface first during assembly, establishing a predetermined reference position that prevents the substrate from moving closer to the package than the designed distance, thereby compensating for adhesive thickness variations.
Solution Approach 2:
The protrusions act as an intermediary element between the relay substrate and the package. They provide a mechanical reference interface that mediates the positioning relationship, ensuring consistent spacing despite variations in the adhesive layer thickness.
2Adaptability or versatility
If adhesive thickness varies during installation, then mounting is flexible, but capacitances between electrode lines and wiring lines vary, making design difficult
Solution Approach 1:
The protrusions are formed in advance on the relay substrate to establish a mechanical stop that defines the minimum distance to the package. This preliminary structural feature ensures that regardless of adhesive thickness variations, the capacitance-critical distance remains within design specifications.
Solution Approach 2:
The patent changes the physical configuration of the substrate by adding protrusions that extend beyond the coupling electrodes. This structural parameter change creates a new reference surface for positioning that is independent of adhesive thickness, thereby stabilizing the electrical parameters (capacitances) between electrodes and wiring lines.
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 ensures consistent capacitances, facilitating design considerations and reducing variations, thereby improving the reliability and performance of the vibrator device.
Implementation Method 1
a bonding material electrically coupling the coupling electrode and the first coupling line to each other
Data Source
AI summary
A vibrator device includes a vibrating body having a first surface, a package having a second surface opposed to the first surface of the vibrating body, a circuit board provided to the package so as to be opposed to the first surface of the vibrating body, a plurality of coupling electrodes provided to the first surface of the vibrating body, a first coupling line provided to the second surface of the package, a second coupling line provided to the circuit board, and a bonding material electrically coupling the coupling electrode and the first coupling line to each other, wherein the vibrating body has a protrusion protruding toward the package farther than the coupling electrode at the first surface side, and the protrusion has contact with the second surface of the package.