Mask Assembly Alignment Mark Patterns for Display Panel Deposition
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge in manufacturing display panels is accurately aligning the substrate with the mask during the deposition process to prevent process errors, which can lead to increased manufacturing costs and reduced reliability of the display panel.
Innovation Solution
A mask assembly with mark patterns and recess portions is used, allowing for precise alignment by forming test thin films and adjusting the position of the mask assembly based on the test films' positions, enabling accurate deposition of light emitting patterns across different areas of the substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the substrate is misaligned with the mask during the deposition process, then process errors occur, but manufacturing cost increases and reliability decreases
Solution Approach 1:
The patent applies preliminary action by forming test thin films on the substrate before the actual deposition process. These test films serve as alignment references that enable precise positioning of the mask assembly relative to the substrate. By preparing alignment markers in advance, the system achieves accurate alignment without requiring complex real-time adjustment mechanisms, thereby improving both manufacturing precision and reliability.
2Manufacturing precision
If different masks are used for different light emitting patterns, then alignment accuracy improves, but manufacturing cost increases
Solution Approach 1:
The patent implements universality by designing a single mask assembly that can be used for depositing multiple different light emitting patterns. The key enabling feature is the set of mark patterns on the substrate that serve as universal alignment references regardless of the specific pattern being deposited. This allows one mask assembly to function universally across different deposition tasks, eliminating the need for multiple specialized masks and thereby reducing manufacturing costs while maintaining alignment accuracy.
Solution Approach 2:
The patent applies copying by using mark patterns that are replicated across the substrate. These mark patterns serve as copyable alignment references that can be used repeatedly with the same mask assembly for different light emitting patterns. The mark patterns act as a master template that enables consistent alignment without requiring custom masks for each pattern type, thus reducing manufacturing complexity and cost.
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 method improves the alignment accuracy and reliability of the display panel manufacturing process, reducing manufacturing costs by allowing the same mask to be used for different light emitting patterns and simplifying the mask manufacturing process.
Implementation Method 1
a plurality of mark patterns at the peripheral area. Each of the mark patterns includes at least one recess portion, and has a point-symmetrical shape with respect to a corresponding symmetry point
Implementation Method 2
The light emitting pattern is patterned by a deposition process using a mask
Data Source
AI summary
A mask includes: a body portion including a cell area, and a peripheral area surrounding the cell area, the body portion having a plurality of cell openings defined therein; and a plurality of mark patterns at the peripheral area. The cell area includes: a first area; and a second area adjacent to the first area, and the plurality of cell openings includes: first cell openings defined at the first area, and spaced from each other; and second cell openings defined at the second area, and spaced from each other. Each of the mark patterns includes at least one recess portion, and has a point-symmetrical shape with respect to a corresponding symmetry point.