Array Substrate Pattern Layout for Planarization Flatness
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Solution Overview
Problem
Existing display technologies face challenges in achieving uniform surface flatness of underlying substrates, leading to uneven planarization and poor performance in electronic devices such as OLED and LED displays, due to the uneven distribution of patterns in functional layers which affect the luminance and luminous uniformity of light-emitting devices.
Innovation Solution
The design of an array substrate with functional patterns and supplementary patterns arranged at equal intervals, including the use of semiconductor, gate metal, and source-drain metal layers, to improve the flatness of the planarization layer by filling gap regions between patterns and ensuring uniform distribution, thereby enhancing the operating effectiveness of driving devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If functional patterns are densely arranged to improve device functionality, then device performance is improved, but surface flatness deteriorates due to uneven distribution creating gap regions
Solution Approach 1:
The patent introduces supplementary patterns specifically in gap regions between functional patterns, creating local structural adjustments. These supplementary patterns are strategically placed in areas where flatness deteriorates, providing local compensation without altering the overall functional pattern arrangement, thus resolving the contradiction between device performance and surface flatness.
Solution Approach 2:
The patent segments the functional layer into functional patterns and supplementary patterns with distinct roles. Functional patterns maintain device functionality while supplementary patterns address surface flatness issues. This segmentation allows independent optimization of both device performance and surface uniformity without compromising either aspect.
2Manufacturing precision
If supplementary patterns are added to improve surface flatness, then manufacturing precision is improved, but device complexity increases due to additional pattern elements
Solution Approach 1:
The supplementary patterns serve multiple functions: they fill gap regions to improve surface flatness, maintain uniform material distribution during planarization, and do not interfere with electrical functionality. This multi-functionality allows surface flatness improvement without proportionally increasing device complexity, as the supplementary patterns perform several beneficial roles simultaneously.
Solution Approach 2:
The supplementary patterns act as intermediary elements between the functional patterns and the planarization layer. They provide a transitional structure that facilitates uniform material deposition and achieves surface flatness without requiring fundamental changes to the functional pattern design, thereby limiting the increase in device complexity.
3Manufacturing precision
If functional patterns are uniformly distributed to improve surface flatness, then manufacturing precision is improved, but device functionality deteriorates due to reduced pattern density in critical areas
Solution Approach 1:
The patent maintains high functional pattern density in areas critical for device functionality while introducing supplementary patterns locally in gap regions. This local quality approach ensures that functional performance is preserved in critical areas while surface flatness is improved in non-critical gap regions, avoiding the need to uniformly reduce pattern density across the entire device.
Solution Approach 2:
The patent segments the pattern distribution into functional patterns for device performance and supplementary patterns for surface flatness. This segmentation allows functional patterns to maintain their optimal density for device functionality while supplementary patterns independently address surface uniformity issues, preventing the trade-off between functionality and flatness that would result from uniform distribution.
Data Source
AI summary
Provided is an array substrate, comprising a plurality of opening regions. The array substrate further comprises a substrate and at least one functional layer stacked on one side of the substrate. The functional layer comprises a plurality of functional patterns and at least one supplementary pattern, the plurality of functional patterns are configured to transmit electrical signals, and there is a gas region between the plurality of functional patterns; the at least one supplementary pattern is at least provided in at least one opening region, and the supplementary pattern is located in the gap region between the plurality of functional patterns. The plurality of functional patterns and the at least one supplementary pattern are spaced apart, and the plurality of functional patterns and the at least one supplementary pattern are arranged at substantially equal intervals.