Resonant Beam Support Layout for High-Pressure Stability
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Solution Overview
Problem
Existing resonant transducers face challenges in maintaining stable resonance under high-pressure environments due to buckling of the resonant beam, and existing solutions either have limitations in tension improvement or increase manufacturing costs and complexity.
Innovation Solution
The design includes a resonant beam with support beams connected at predetermined angles, a first electrode connected via these support beams, and conductors between the support beams and second electrodes, allowing for controlled pressure strain and reduced electrostatic attraction, thereby stabilizing the resonant beam's operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the resonant beam is used in a high-pressure environment, then the resonant transducer can operate under high pressure, but the resonant beam will buckle due to compressive strain
Solution Approach 1:
The patent applies preliminary anti-action by introducing a pretensioning mechanism through the support beam structure. The support beam is configured to apply a preliminary tensile force to the resonant beam before high-pressure conditions occur, creating a pre-stressed state that counteracts the compressive strain that will occur during high-pressure operation, thereby preventing buckling
Solution Approach 2:
The patent segments the support structure into multiple components: the resonant beam, support beams, and electrodes are separated into distinct functional elements. The support beams are positioned at specific intervals and angles to provide distributed structural support rather than a single continuous support, allowing independent optimization of each segment's mechanical properties
2Reliability
If impurities are diffused in the resonant beam to apply high tension, then the resonant beam can resist buckling under high pressure, but the manufacturing process becomes laborious and cost increases
Solution Approach 1:
The patent replaces the chemical/thermal process of impurity diffusion with a mechanical pretensioning system. Instead of using thermal diffusion to create internal stress through material composition changes, the invention uses mechanically adjustable support beams that can be configured to apply the required tensile force, converting a complex materials science process into a simpler mechanical assembly process
Solution Approach 2:
The patent changes the approach from modifying material parameters (impurity concentration through diffusion) to adjusting geometric and mechanical parameters (support beam position, angle, and stiffness). This allows the same functional outcome of applying tension to the resonant beam but through controllable mechanical parameters that are easier to adjust and optimize during manufacturing
3Reliability
If support beams extend from the end parts of the resonant beam to both sides in an arrow shape, then the influence of compressive strain is eliminated, but the peripheral region is spread out and electrostatic attraction causes fluctuation in resonance
Solution Approach 1:
The patent introduces conductors as intermediary elements between the support beams and the resonant beam. These conductors serve as mediators that provide the necessary electrical connection and electrostatic actuation while being positioned to minimize direct mechanical interference with the resonant beam's vibration mode, thus reducing the spread of the peripheral region and minimizing electrostatic attraction fluctuations
Solution Approach 2:
The patent uses a simplified support beam configuration that copies the essential function of the arrow-shaped support structure (providing lateral stability) without replicating its complex geometry. The support beams are positioned at optimized angles and locations that provide the necessary structural support while maintaining a more compact footprint and reducing the spread of peripheral regions
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 enables the resonant transducer to detect stress with high precision and prevent buckling, even in high-pressure environments, by minimizing force interactions between support beams and electrodes, ensuring stable resonance and improved pressure sensitivity.
Implementation Method 1
the resonant beam may not be excited by an electrostatic force
Implementation Method 2
a fine resonant beam (a resonator) which is disposed inside the vacuum chamber, and a resonant detector for detecting the resonance of the resonant beam
Data Source
AI summary
A resonant transducer includes a resonant beam which is formed on a semiconductor substrate, a support beam of which one end is connected to a part of the resonant beam at a predetermined angle, a first electrode which is connected to the resonant beam via the support beam, a second electrode which is disposed adjacent to a center of one side surface of the resonant beam, and a conductor which is disposed between the support beam and the second electrode, the conductor being connected to the first electrode.