Transistor Array Substrate Layout for Channel Protection Under High Voltage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The fabrication process of electronic devices with multiple transistors is complicated and difficult, leading to degraded device performance and challenges in designing transistors with different functions, and there is a risk of short circuits and mobility degradation due to high voltage applications.
Innovation Solution
A transistor array substrate design with a specific structure that includes a gate electrode overlapping portions of the active layer areas, separated by a gate insulating film to prevent short circuits and channel area deterioration, while maintaining appropriate channel length for mobility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the gate electrode is positioned to overlap the channel area for effective control, then the transistor switching performance is improved, but the risk of short circuit between gate electrode and active layer increases
Solution Approach 1:
A gate insulating film is introduced as an intermediary layer between the gate electrode and the active layer. This insulating film allows the gate electrode to overlap the channel area for effective electrostatic control while preventing direct electrical contact that would cause short circuits. The insulating film acts as a mediator that enables both the overlapping configuration for performance and the electrical isolation for reliability.
2Power
If high voltage is applied to the electrode connected to power supply node for driving performance, then the transistor driving capability is improved, but channel area deterioration and mobility degradation occur
Solution Approach 1:
The gate insulating film is positioned in advance to overlap the channel area, creating a protective barrier before high voltage is applied. This pre-positioned insulating structure cushions the channel area from the harmful effects of high voltage stress, preventing deterioration and mobility degradation while allowing the transistor to maintain its driving capability through proper gate control.
3Adaptability or versatility
If transistors are designed with different structures for different functions, then the functional requirements are met, but the fabrication process becomes complicated and difficult
Solution Approach 1:
The gate insulating film structure serves multiple functions simultaneously: it prevents short circuits between the gate electrode and active layer, protects the channel area from high voltage deterioration, and maintains proper electrostatic control for transistor switching. This multi-functional design allows different transistor types to be fabricated using a unified process approach, reducing fabrication complexity while maintaining functional adaptability.
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
Prevents short circuits and channel area deterioration, maintaining transistor mobility and reliability even under high voltage conditions, thereby enhancing device performance.
Implementation Method 1
a gate insulating film disposed on the first active layer
Implementation Method 2
a gate electrode of the at least transistor disposed on the gate insulating film and overlapping a portion of the channel area of the first active layer
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Provided are a transistor array substrate and an electronic device. A first active layer includes a first area, a second area spaced apart from the first area, and a channel area provided between the first area and the second area. A gate insulating film is disposed on the first active layer. A gate electrode is disposed on the gate insulating film to overlap a portion of the channel area of the first active layer. The gate electrode overlaps a portion of at least one area of the first and second areas of the first active layer. Deteriorations in the channel area are prevented.