ESD Device Hollow Porous Ceramic Structure Heat Dissipation
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Solution Overview
Problem
Existing ESD protective devices face heat load issues on auxiliary discharge electrodes, leading to potential deterioration during electrostatic discharge, which can cause device failure.
Innovation Solution
The ESD protective device incorporates a hollow portion within the element assembly with inclined inner surfaces, increasing the surface area for heat dissipation, thereby reducing the heat load on the auxiliary discharge electrode and preventing its deterioration. This is achieved through the lamination of ceramic layers with strategically formed hole portions that align and overlap to form a continuous hollow space, facilitating effective heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional ESD protective device structure is used, then the device can perform electrostatic discharge function, but the auxiliary discharge electrode undergoes heat load and deterioration
Solution Approach 1:
The patent introduces a hollow portion as an intermediary heat dissipation structure between the discharge electrodes and the auxiliary discharge electrode. This hollow space acts as a thermal mediator that facilitates heat transfer away from the auxiliary discharge electrode, reducing its thermal load and preventing deterioration while maintaining the ESD protection function.
Solution Approach 2:
The hollow portion creates a porous or cavity-containing structure within the element assembly. This porous configuration increases the surface area available for heat dissipation and provides thermal pathways that reduce heat concentration on the auxiliary discharge electrode, thereby improving its durability under repeated discharge conditions.
2Temperature
If heat dissipation surface area is increased, then heat load on auxiliary discharge electrode is reduced, but device structure becomes more complex
Solution Approach 1:
The hollow portion is integrated into the existing element assembly structure, merging the heat dissipation function with the structural framework. Rather than adding separate heat dissipation components, the hollow space is formed as part of the assembly itself, increasing surface area for heat dissipation while minimizing additional structural complexity.
Solution Approach 2:
The hollow portion utilizes the vertical or depth dimension within the element assembly to create additional heat dissipation surface area. By forming cavities that extend into the thickness of the assembly, the design increases effective heat dissipation area without significantly increasing the planar footprint or overall device dimensions.
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 increased surface area within the hollow portion effectively dissipates heat from electrostatic discharge, significantly reducing the heat load on the auxiliary discharge electrode and preventing its deterioration, thus enhancing the device's reliability and longevity.
Implementation Method 1
the surface area of the inner surfaces of the hollow portion is able to be increased. Accordingly, heat occurring in electrostatic discharge is able to be satisfactorily dissipated from the inner surfaces of the hollow portion
Data Source
AI summary
An ESD protective device includes an element assembly with a hollow portion that includes inner surfaces including a first inner surface, a second inner surface, and a third inner surface inclined to a Z direction in a cross section including the Z direction. Accordingly, a surface area of the inner surfaces of the hollow portion is increased, the heat load on an auxiliary discharge electrode is reduced, and the deterioration of the auxiliary discharge electrode is significantly reduced or prevented.