Vibrator Device Frequency Adjustment Terminal Placement
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Solution Overview
Problem
Existing vibrator devices require frequency adjustment of the vibrator element after it is disposed in a package, leading to increased manufacturing costs when the resonance frequency is out of standard, as both the IC chip and package become useless.
Innovation Solution
A vibrator device configuration that includes a base, a circuit element with a terminal for frequency adjustment positioned outside the vibrator element, and a relay substrate to minimize stress on the vibrator element, allowing for frequency adjustment before packaging, and protection from moisture and impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If frequency adjustment is performed after the vibrator element is disposed in the package, then the vibrator element can be adjusted, but both the IC chip and package become useless when the resonance frequency is out of standard, leading to increased manufacturing costs
Solution Approach 1:
The patent applies preliminary action by providing a frequency adjustment terminal on the circuit element that allows frequency adjustment of the vibrator element to be performed before the vibrator element is disposed in the package. This enables frequency verification and adjustment at an earlier stage, preventing waste of the package and IC chip when frequency specifications are not met.
2Area of stationary object
If the terminal for frequency adjustment is positioned inside the vibrator element region, then the structure is compact, but it is difficult to press a probe against the terminal for frequency adjustment
Solution Approach 1:
The patent positions the frequency adjustment terminal in a region that does not overlap with the vibrator element when viewed in plan view, effectively utilizing the third dimension (vertical stacking) to resolve the spatial conflict. This allows the terminal to be electrically connected to the vibrator element while being physically accessible from the side, enabling easy probe contact without increasing the package footprint.
3Device complexity
If the vibrator element is directly attached to the base, then the structure is simple, but stress is transmitted to the vibrator element, degrading vibration characteristics
Solution Approach 1:
The patent introduces a relay substrate as an intermediary component between the base and the vibrator element. The relay substrate includes beam portions that connect different layers, creating a mechanical isolation path that prevents stress from the base from being transmitted to the vibrator element, thereby preserving vibration characteristics while maintaining structural integrity.
Data Source
AI summary
A vibrator device includes abase, a circuit element that is attached to the base, and a vibrator element that is arranged at an active surface of the circuit element and is attached to the circuit element, and the circuit element includes a terminal for frequency adjustment that is used for frequency adjustment of the vibrator element and is disposed in a region that does not overlap the vibrator element when viewed in a plan view of the active surface.