Mask Frame Assembly with Recessed Support for Display Deposition
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Solution Overview
Problem
In deposition processes for display panels, the accuracy of forming light emitting patterns is compromised due to misalignment of masks within deposition apparatuses, leading to reduced positional accuracy of the patterns formed.
Innovation Solution
A mask frame assembly with support members on its front and rear portions, which includes recessed parts and support members to control deformation, ensuring accurate positioning of the mask frame and maintaining the mask's alignment during the deposition process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a large-area mask is used to improve production yield, then productivity is improved, but mask alignment accuracy deteriorates due to deformation and sagging of the mask frame
Solution Approach 1:
The mask frame is divided into multiple sections with recessed parts positioned at specific locations. Support members are inserted into these recessed parts to provide localized support, effectively segmenting the support function across multiple points rather than relying on a single support structure. This segmentation prevents overall frame deformation while maintaining the large-area mask configuration.
Solution Approach 2:
Support members act as intermediary elements between the mask frame and the deposition apparatus. These support members are inserted into recessed parts of the mask frame to provide mechanical support, preventing sagging and deformation. The support members serve as mediators that transmit structural support without interfering with the mask's deposition function.
2Area of stationary object
If the mask frame is made larger to cover more area, then the deposition coverage is improved, but the mask frame deformation increases leading to reduced positional accuracy
Solution Approach 1:
The solution addresses the large-area mask deformation problem by introducing support members in the vertical dimension (depth direction). The recessed parts extend into the mask frame structure, and support members are inserted to provide support from the opposite side. This dimensional approach allows the mask frame to maintain its large coverage area while preventing deformation through three-dimensional structural reinforcement.
Data Source
AI summary
A mask frame assembly includes a mask frame including: a first surface including a first long side part extending in a first direction, a first short side part extending in a second direction intersecting the first direction, and a first recessed part extending in the first direction or the second direction, a second surface opposite to the first surface and including a second long side part extending in the first direction, a second short side part extending in the second direction, and a second recessed part disposed in the first direction or the second direction, a third surface connected to the first surface and the second surface and defining a frame opening part; a first support member disposed in the first recessed part; and a second support member disposed in the second recessed part.