Electrostatic Sensor Dielectric Layer for Real-Time Monitoring
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Solution Overview
Problem
Conventional electrostatic sensors are ineffective in real-time monitoring and are prone to malfunction due to high static electricity interference during the manufacturing of slim and miniaturized electronic products, leading to production yield and quality degradation.
Innovation Solution
An electrostatic detecting device comprising a substrate, a sensing electrode, a dielectric layer with a dielectric constant greater than 1, and a ground electrode, where the dielectric layer is strategically positioned between or below the sensing electrode to control the electric field and enhance detection sensitivity and dynamic range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If conventional electrostatic sensors are used for handheld or fixed-point measurements, then device simplicity is maintained, but real-time monitoring capability is lost
Solution Approach 1:
The patent integrates the electrostatic sensing function directly into the manufacturing equipment structure by combining the sensing electrode with the equipment's existing components (such as the substrate or support structure). This merging eliminates the need for separate handheld sensors while enabling continuous real-time monitoring during the manufacturing process, thus improving automation without proportionally increasing complexity.
Solution Approach 2:
The sensing electrode is designed to serve multiple functions: it acts as both a structural component of the manufacturing equipment and an electrostatic sensing element. This multi-functionality allows the same component to perform mechanical support and electrical sensing simultaneously, thereby enabling real-time monitoring while minimizing additional device complexity.
2Measurement precision
If short-distance detection is performed to improve measurement precision, then detection accuracy increases, but element sensitivity fails due to high static electricity peaks
Solution Approach 1:
The dielectric layer is introduced as an intermediary component between the sensing electrode and the object being detected. This dielectric layer with controlled permittivity moderates the electric field interaction, allowing the sensor to maintain accurate detection at short distances without being overwhelmed by high static electricity peaks. The dielectric constant of the layer is specifically selected to balance field enhancement with element protection.
Solution Approach 2:
The patent modifies the electrical parameters of the detection system by introducing a dielectric layer with specific permittivity values. This parameter change alters the electric field distribution and capacitance characteristics, enabling the sensing electrode to operate reliably at short distances while maintaining element sensitivity stability. The dielectric layer effectively transforms the electrical interaction parameters to achieve both precision and reliability.
3Measurement precision
If the sensing electrode is positioned close to the object for better detection, then measurement precision improves, but oversaturation of detection elements occurs
Solution Approach 1:
The dielectric layer serves as a mediator that allows close positioning of the sensing electrode to the object while preventing direct electrical breakdown or oversaturation. The layer's dielectric properties create an optimized electric field distribution that enhances detection sensitivity at short distances without causing harmful oversaturation effects on the detection elements.
Solution Approach 2:
The dielectric layer provides beforehand cushioning protection to the detection elements by absorbing and distributing excessive electric field energy before it can cause oversaturation. This protective layer is positioned in advance between the sensing electrode and the object, cushioning the detection elements against potential harmful electrical effects while maintaining close-proximity detection capability.
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 device effectively reduces oversaturation of detection elements, improves sensitivity, and adjusts the dynamic range for short-distance electrostatic charge detection, preventing malfunctions and enhancing the detection performance in high-static environments.
Implementation Method 1
The dielectric layer is disposed on the second surface and has a dielectric constant greater than 1. The ground electrode is disposed apart from the sensing electrode by a spacing. The dielectric layer is disposed between the sensing electrode and the ground electrode.
Implementation Method 2
The sensing electrode is disposed on the first surface and has a sensing surface. The sensing surface faces away from the first surface and configured to face the object.
Data Source
AI summary
An electrostatic detecting device adapted to an object. The electrostatic detecting device includes a substrate, a sensing electrode, a dielectric layer and a ground electrode. The substrate has a first surface and a second surface opposite to the first surface. The sensing electrode is disposed on the first surface and has a sensing surface. The sensing surface faces away from the first surface and configured to face the object. The dielectric layer having a dielectric constant greater than 1 is disposed on the second surface. The ground electrode is disposed apart from the sensing electrode by a spacing. The dielectric layer is disposed between the sensing electrode and the ground electrode.