Deposition Mask Mesh Structure to Eliminate OLED Dark Lines
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Solution Overview
Problem
Existing deposition methods for organic light-emitting display devices face inefficiencies and visual defects due to the need for multiple masks and connecting members, which increase processing time and cost and result in visible dark lines on the deposition film.
Innovation Solution
A deposition mask design featuring a frame with a first opening, a first member with a second opening, and a second member with a connecting portion and mesh portion, allowing for the formation of holes without direct support from the frame, eliminating the need for connecting members and improving process efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If multiple masks and connecting members are used to support hole-forming portions, then structural stability is improved, but device complexity and process time increase
Solution Approach 1:
The patent merges the support function and hole-forming function into a single integrated mask structure. The hole-forming portion is directly formed as part of the mask body rather than being separately supported by connecting members, thereby reducing device complexity while maintaining structural stability through the unified design.
Solution Approach 2:
The patent extracts and eliminates the connecting members that were previously used to support hole-forming portions. By removing these unnecessary components, the design achieves both simplified structure and reduced process complexity while the hole-forming portion remains stable through direct integration with the mask.
2Stability of the object's composition
If connecting members are used to support hole-forming portions, then structural stability is improved, but manufacturing time and cost increase
Solution Approach 1:
The support structure and hole-forming function are merged into a single mask component, eliminating the need for separate connecting members. This integration reduces the number of manufacturing steps and assembly operations, thereby reducing manufacturing time and cost while maintaining structural stability.
Solution Approach 2:
The patent removes the connecting members from the assembly, extracting the unnecessary support structure. This elimination directly reduces manufacturing time and cost while the hole-forming portion maintains stability through its direct formation as part of the mask body.
3Stability of the object's composition
If connecting members are used to support hole-forming portions, then structural stability is improved, but visual defects appear on the deposition film
Solution Approach 1:
The patent extracts and removes the connecting members that caused visual defects on the deposition film. By eliminating these components, the harmful visual defects are removed while the hole-forming portion maintains structural stability through direct integration with the mask.
Solution Approach 2:
The support function and hole-forming function are merged into a single mask structure, eliminating the connecting members that produced visual defects. The unified design ensures structural stability while preventing harmful visual defects on the deposition film.
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 solution enhances manufacturing efficiency and prevents visual defects by forming deposition films using a single open mask, eliminating dark lines and reducing processing time and costs.
Implementation Method 1
one method thereof is a deposition method
Implementation Method 2
The second portion may be welded to the second mesh portion using a laser
Data Source
AI summary
A deposition mask for making a display device, the deposition mask includes: a frame including a first opening; a first member disposed above the first opening of the frame and including a first portion surrounding at least one second opening and a second portion disposed in the second opening and physically separated from the first portion; and a second member disposed on the first member and including a first connecting portion connected to the frame and a second mesh portion overlapping the second portion.