Electrostatic Discharge Protection Using Porous Active-Layer Heat Spreading
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Solution Overview
Problem
Existing electrostatic discharge protection devices fail to effectively dissipate heat generated in active layers, leading to heat concentration, reduced breakdown voltage, and reliability issues in display devices.
Innovation Solution
An electrostatic discharge protection device with a high-mobility oxide semiconductor active layer featuring heat spreading patterns and holes to dissipate heat, formed through the same process as transistors, preventing heat concentration and improving breakdown voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrostatic discharge protection device is used, then reliability of display device is improved, but heat concentration occurs in active layer reducing breakdown voltage
Solution Approach 1:
The active layer is segmented by forming holes (first holes and second holes) throughout its structure, dividing the continuous active layer into discrete regions. This segmentation creates multiple heat dissipation pathways, preventing heat concentration in any single area while maintaining the protective function against electrostatic discharge.
Solution Approach 2:
The active layer is designed with a porous structure containing multiple holes distributed within its volume. This porous configuration increases the surface area for heat dissipation and creates channels for heat to escape, effectively reducing heat concentration while preserving the electrical protective function of the active layer.
2Productivity
If wide channel transistor is used, then productivity is improved, but conductive diffusion increases causing threshold voltage sensitivity
Solution Approach 1:
The channel region of the wide channel transistor is segmented by forming holes within the active layer. This segmentation divides the continuous conductive path into discrete sections, reducing the extent of conductive diffusion while maintaining the wide channel configuration needed for high productivity. The holes act as barriers that limit diffusion without significantly increasing threshold voltage sensitivity.
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
Enhances heat dissipation, increases breakdown voltage, and improves reliability and durability of display devices by stabilizing signal input and minimizing channel length margin, allowing operation at low power with high device stability.
Implementation Method 1
capable of spreading heat generated from an active layer and easily dissipating heat to the outside
Data Source
AI summary
An electrostatic discharge protection device can include a first electrode extending in a first direction, an active layer, and a second electrode. The active layer has a first width in the first direction, and overlaps the first electrode. The active layer includes at least one hole in an overlapping region, and is disposed longer outwardly than one or more sides of the first electrode in a second direction intersecting the first direction. The second electrode is disposed side by side with the first electrode and includes a first connection portion to one side of the active layer.