ESD Protection Device Cavity Electrode Configuration
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Solution Overview
Problem
Existing ESD protection devices experience an increase in discharge start voltage or fail to discharge when static electricity is applied, especially after repeated use, due to electrode tip protrusion into cavities and lack of effective insulation maintenance.
Innovation Solution
The ESD protection device features a ceramic multilayer substrate with discharge electrodes positioned at the edges of a cavity, an auxiliary electrode with metal particles coated in inorganic material, and sealing layers with higher sintering temperatures to prevent electrode peeling and maintain insulation, ensuring consistent discharge performance even after repeated use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the electrode tips are positioned at the cavity edges to prevent peeling, then the insulation integrity is maintained, but the discharge capability may be reduced
Solution Approach 1:
The patent positions electrode tips at the edges of the cavity rather than protruding into the cavity space. This dimensional repositioning maintains insulation integrity by preventing peeling while preserving discharge capability through the optimized gap configuration between opposing electrode tips, allowing discharge to occur effectively without compromising structural stability.
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 significantly reduces the likelihood of increased discharge start voltage and electrode peeling, ensuring reliable static electricity protection for a longer duration by maintaining effective discharge and insulation integrity.
Implementation Method 1
creeping discharge and aerial discharge between the first and second discharge electrodes 104 and 105, which face into the cavity 103, are utilized
Implementation Method 2
conductive particles 106a coated with an inorganic material having no electric conductivity are dispersed in a ceramic material
Implementation Method 3
a sealing layer including a ceramic having a sintering temperature that is higher than that of a material constituting the ceramic multilayer substrate is provided
Data Source
AI summary
A highly reliable ESD protection device that prevents failure of discharge and variation of a discharge start voltage even when protection from static electricity is repeatedly performed includes a cavity provided in a ceramic multilayer substrate. First and second discharge electrodes are provided in the ceramic multilayer substrate and face each other across a gap. A tip of the first discharge electrode and a tip of the second discharge electrode are positioned at edges of the cavity or at positions receded from the edges.