Mask Assembly Support Stick Nesting for Display Deposition
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Solution Overview
Problem
The existing mask assemblies in display apparatus manufacturing suffer from a shadow phenomenon, which leads to uneven deposition of materials and reduced deposition quality.
Innovation Solution
A mask assembly design that includes a mask frame with an opening area, a mask sheet covering the opening, and a support stick extending between the mask frame and the mask sheet. The support stick has openings to accommodate connection sticks between submasks, ensuring proper alignment and preventing shadowing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If connection sticks are used to connect submasks in the existing mask assembly, then the submasks can be securely connected, but the connection sticks cause a shadow phenomenon that leads to uneven deposition
Solution Approach 1:
The connection sticks are nested inside the support stick by providing openings in the support stick that accommodate the connection sticks. This nesting arrangement allows the connection sticks to be hidden within the support stick structure, eliminating the shadow phenomenon caused by exposed connection sticks while maintaining the secure connection between submasks.
Solution Approach 2:
The support stick acts as an intermediary structure that mediates between the connection sticks and the external environment. By providing openings in the support stick, the connection sticks are shielded from causing shadow effects on the deposition process, while still fulfilling their function of connecting submasks.
2Ease of manufacture
If the mask assembly structure is simplified, then the manufacturing process becomes easier, but the shadow phenomenon cannot be prevented
Solution Approach 1:
The support stick serves multiple functions: it supports the mask sheet, provides structural stability, and contains openings to accommodate connection sticks. This multi-functionality allows the mask assembly to maintain structural integrity and prevent shadow phenomena without requiring separate components, thus keeping the manufacturing process relatively simple while improving deposition quality.
3Stability of the object's composition
If the support stick is made thicker to provide better support, then the structural stability improves, but the shadow phenomenon worsens
Solution Approach 1:
By nesting the connection sticks inside the support stick through provided openings, the support stick can be made thicker for better structural stability without the thicker portion causing external shadow effects. The connection sticks are hidden within the support stick structure, eliminating shadow phenomena while maintaining enhanced structural support.
Data Source
AI summary
A mask assembly and an apparatus for manufacturing a display apparatus are provided. The mask assembly includes a mask frame including an opening area, at least one mask sheet covering the opening area of the mask frame, and a support stick disposed between the mask frame and the at least one mask sheet, extending in a first direction to traverse the opening area, and having both ends fixed to the mask frame. The at least one mask sheet includes submasks disposed side by side in a direction intersecting the first direction in which the support stick extends, and a connection stick disposed between the submasks and connecting two adjacent submasks among the submasks. The connection stick overlaps the support stick in a plan view.