Electrostatic Device Bonding Layer Parasitic Capacitance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
MEMS devices manufactured from SOI substrates face issues with electrical characteristics due to electrification of the BOX layer, leading to malfunctions, increased driving power, and lower detection sensitivity caused by parasitic capacitance.
Innovation Solution
An electrostatic device with a conductive base material, a first conductor layer, a second conductor layer, and a bonding layer, where the bonding layer is partially supportive and minimizes the area between the base material and the conductor layers, reducing parasitic capacitance and improving device characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the BOX layer and supporting layer are used to ensure rigidity and strength, then structural stability is improved, but parasitic capacitance increases leading to lower detection sensitivity
Solution Approach 1:
The patent extracts and removes the BOX layer from the SOI substrate structure. By taking out the problematic BOX layer that causes parasitic capacitance, the invention eliminates the source of the measurement precision degradation while maintaining structural stability through alternative support mechanisms
Solution Approach 2:
The patent introduces an intermediary bonding layer that attaches the active layer directly to the supporting layer. This bonding layer serves as a mediator that provides mechanical support and electrical isolation, replacing the need for the BOX layer and thereby reducing parasitic capacitance while maintaining structural integrity
2Strength
If the BOX layer is present in the structure, then mechanical support is improved, but electrification occurs causing malfunctions
Solution Approach 1:
The patent removes the BOX layer that causes electrification issues. By extracting this problematic layer, the invention eliminates the source of malfunctions and reliability problems while compensating for mechanical support through direct bonding of the active layer to the supporting layer
Solution Approach 2:
The patent replaces the permanent BOX layer with a bonding layer that can be selectively removed or is designed to be temporary during the device lifecycle, allowing for better control over electrical characteristics and reliability
3Strength
If the bonding layer covers the entire base portion, then structural support is improved, but parasitic capacitance increases leading to higher power consumption
Solution Approach 1:
The patent segments the bonding layer into multiple discrete bonding portions rather than using a continuous layer. This segmentation reduces the total area of the bonding layer in contact with the base material, thereby reducing parasitic capacitance and power consumption while maintaining sufficient structural support at critical locations
Solution Approach 2:
The patent applies bonding layers selectively at specific locations where mechanical support is most needed, rather than covering the entire base portion. This local quality approach optimizes the balance between structural support and minimizing parasitic capacitance, reducing power consumption
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
The solution enhances device reliability, reduces power consumption, and improves detection sensitivity by minimizing the adverse effects of electrification and parasitic capacitance.
Implementation Method 1
an electrically isolative bonding layer disposed between the base material and the first and second base portions
Implementation Method 2
the signal line configures a signal input line that generates electrostatic force between the first and second electrode portions
Implementation Method 3
the signal line configures a signal output line that outputs a voltage signal corresponding to a relative distance between the first and second electrode portions
Data Source
AI summary
[Object] To provide an electrostatic device capable of improving device characteristics.[Solving Means] An electrostatic device according to an embodiment of the present technology includes an electrically conductive base material, a first conductor layer, a second conductor layer, and a bonding layer. The first conductor layer includes a first electrode portion and a first base portion and is connected to a signal line. The first base portion supports the first electrode portion and is disposed on the base material. The second conductor layer includes a second electrode portion and a second base portion and is connected to a reference potential. The second electrode portion is opposed to the first electrode portion in a first axis direction and configured to be movable relative to the first electrode portion in the first axis direction. The second base portion supports the second electrode portion and is disposed on the base material. The bonding layer is disposed between the base material and the first and second base portions and includes a plurality of first bonding portions that partially support at least the first base portion.