Mask Assembly Alignment via Evaporation Marks
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Solution Overview
Problem
The alignment accuracy of mask assemblies in display panel production is compromised due to misalignment of holes, leading to deformation and position deviations during the evaporation process, affecting the precision and quality of the evaporation process.
Innovation Solution
A preparation method for a mask assembly involving the fixation of a blocking on a frame, followed by the opening of stretching and evaporation align holes and marks using laser cutting, and the subsequent alignment and fixation of a mask sheet without an align mask, ensuring accurate positioning and minimizing deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If align holes are provided on components constituting the mask assembly, then assembly alignment is facilitated, but misalignment of these holes causes low alignment accuracy between substrate and mask assembly
Solution Approach 1:
The patent removes the additional align mask component entirely, extracting the alignment function from a separate element and integrating it into the mask sheet itself. This eliminates the source of misalignment between separate components while maintaining the alignment facilitation function through evaporation align marks directly on the mask sheet.
Solution Approach 2:
The patent merges the alignment function with the mask sheet by providing evaporation align marks directly on it. This combines the mask function and alignment reference function into a single component, ensuring that the align marks cannot be misaligned relative to the mask pattern, thereby resolving the contradiction between ease of alignment and alignment accuracy.
2Manufacturing precision
If an additional align mask is used to achieve alignment, then alignment between components is improved, but the assembly process becomes more complex
Solution Approach 1:
The patent extracts and eliminates the additional align mask from the assembly, removing the complexity it introduces while preserving the essential alignment function through evaporation align marks integrated into the mask sheet.
Solution Approach 2:
The mask sheet is given multiple functions: it serves both as the evaporation mask and as the alignment reference carrier through its evaporation align marks. This multi-functionality eliminates the need for a separate align mask, simplifying the assembly process while maintaining alignment accuracy.
3Manufacturing precision
If holes are opened in components before assembly, then alignment marks are available, but deformation and position deviations occur affecting evaporation quality
Solution Approach 1:
The patent applies preliminary action by forming evaporation align marks on the mask sheet before assembly, but these marks are designed to be stable and resistant to deformation during the assembly process. The marks are positioned and formed in advance on the correct component (mask sheet) rather than on separate components that may shift during assembly.
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 enhances the alignment accuracy and evaporation quality by maintaining the original shape and position of align marks, reducing the likelihood of deformation and position deviations, and simplifies the assembly process by omitting the align mask.
Implementation Method 1
opening at least one stretching align hole and at least one evaporation align mark in the fixed blocking and frame; opening at least one evaporation align mark in the fixed mask sheet
Data Source
AI summary
An embodiment of the present application provides a preparation method of a mask assembly, including: fixing, after stretching and aligning a blocking, the blocking on a side of a frame; opening at least one stretching align hole and at least one evaporation align mark in the fixed blocking and frame; fixing, after stretching and aligning a mask sheet, the mask sheet on a side of the blocking away from the frame according to the stretching align hole; and opening at least one evaporation align mark in the fixed mask sheet to obtain the mask assembly.