ESD Protection Device with Conductive Supporting Electrode
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Solution Overview
Problem
Existing ESD protection devices face challenges in achieving consistent and adjustable ESD responsivity due to variations in the space between discharge electrodes, limiting their effectiveness in protecting electronic circuits from electro-static discharge.
Innovation Solution
Incorporating a supporting electrode with a conductive material coated by an inorganic material into the ceramic multilayer substrate, which allows for precise adjustment of discharge starting voltage and improved adhesiveness, reducing the likelihood of short circuits and detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the space between discharge electrodes is adjusted to achieve desired ESD responsivity, then the ESD characteristics can be optimized, but the manufacturing precision and stability deteriorate due to variations in the space between electrodes
Solution Approach 1:
The invention changes the parameter being adjusted from the physical space between electrodes to the resistance value of the supporting electrode. By controlling the resistance of the supporting electrode (which connects the discharge electrodes), the ESD discharge starting voltage can be precisely adjusted without needing to vary the electrode spacing, thereby maintaining manufacturing precision while achieving desired ESD responsivity.
2Adaptability or versatility
If the area between discharge electrodes is increased to adjust ESD responsivity, then the discharge characteristics improve, but the product size increases
Solution Approach 1:
The invention enables adjustment of ESD responsivity through resistance value control of the supporting electrode rather than through geometric changes. This allows the discharge characteristics to be optimized by electrical parameter adjustment (resistance) instead of increasing the physical area between electrodes, thus maintaining compact product dimensions while achieving desired ESD performance.
3Adaptability or versatility
If conductive material is added to adjust discharge starting voltage, then ESD characteristics improve, but short circuits between discharge electrodes may occur
Solution Approach 1:
The invention applies local quality by creating a spatially differentiated conductive structure. The supporting electrode has higher conductivity in regions away from the discharge gap to provide stable electrical connection and voltage division, while maintaining lower conductivity near the discharge gap to prevent short circuits. This localized variation in conductivity allows discharge starting voltage adjustment without compromising reliability.
Solution Approach 2:
The supporting electrode acts as an intermediary element between the discharge electrodes. Instead of directly modifying the discharge gap or adding conductive material between the electrodes (which could cause short circuits), the supporting electrode provides indirect control of the discharge characteristics through resistance-based voltage division, thereby adjusting discharge starting voltage while preventing short circuits.
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 the stability and adjustability of ESD characteristics, ensuring efficient discharge and preventing short circuits, thereby effectively protecting electronic circuits from electro-static discharge.
Implementation Method 1
Since the ESD protection device includes the supporting electrode with a conductive material dispersed therein in that region, electrons easily move and discharge is efficiently generated.
Implementation Method 2
a supporting electrode disposed in a region that connects the pair of discharge electrodes, the supporting electrode being obtained by dispersing a conductive material coated with an inorganic material having no conductivity
Implementation Method 3
When a breakdown voltage is applied between the discharge electrodes 6, discharge is caused between the discharge electrodes 6 in the cavity 5, which leads an excessive voltage to the ground.
Data Source
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AI summary
An ESD protection device whose ESD characteristics are easily adjusted and stabilized is provided. An ESD protection device 10 includes (a) a ceramic multilayer substrate 12, (b) at least a pair of discharge electrodes 16 and 18 formed in the ceramic multilayer substrate 12 and facing each other with a space 15 disposed therebetween, and (c) external electrodes formed on a surface of the ceramic multilayer substrate 12 and connected to the discharge electrodes 16 and 18. The ESD protection device 10 includes a supporting electrode 14 disposed in a region that connects the pair of discharge electrodes 16 and 18. The supporting electrode 14 is obtained by dispersing a conductive material 34 coated with an inorganic material having no conductivity.