Mask Assembly Rib Segmentation for Display Deposition Precision
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing mask assemblies face challenges in achieving precise arrangement of the mask sheet on the mask frame, which affects the deposition accuracy in display apparatus manufacturing.
Innovation Solution
The proposed mask assembly features a mask frame with a plurality of ribs and receiving portions, where the mask sheet is accurately disposed to cover the opening area, and gas is sprayed into the receiving portions to reduce friction and enhance precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the mask sheet is fixed to the mask frame using conventional methods, then the mask assembly can be manufactured, but the arrangement precision of the mask sheet on the mask frame is insufficient
Solution Approach 1:
The mask frame is segmented into multiple ribs (first rib, second rib, third rib, fourth rib) that are spaced apart from each other. These ribs are divided into multiple segments along their lengths, with each segment containing receiving portions. This segmentation allows the mask sheet to be positioned and fixed at multiple discrete points, improving arrangement precision while maintaining manufacturing feasibility.
Solution Approach 2:
Receiving portions are introduced as intermediary structures on the ribs. These receiving portions receive and hold the mask sheet at specific positions, acting as mediators between the rib structure and the mask sheet. This intermediary mechanism enables precise positioning without requiring complex direct fixation methods.
2Ease of operation
If gas is sprayed from the mask stage to lift the mask frame, then friction between the mask stage and mask frame is reduced, but the positioning accuracy may be compromised
Solution Approach 1:
The mask sheet is fixed to the mask frame at multiple predetermined positions through the receiving portions before the deposition process begins. This preliminary fixation ensures that even when gas is sprayed to reduce friction during subsequent operations, the mask sheet maintains its precise position relative to the mask frame, preventing positioning drift.
Solution Approach 2:
The receiving portions are distributed at different locations (first, second, and third ribs at different positions) along the mask frame. This local distribution of fixation points ensures that the mask sheet is securely held at multiple critical positions, maintaining overall positioning accuracy while allowing gas spraying for friction reduction during movement.
3Manufacturing precision
If multiple ribs with receiving portions are used to improve mask sheet positioning, then arrangement precision is enhanced, but the device complexity increases
Solution Approach 1:
The ribs serve multiple functions: they provide structural support for the mask frame, define the opening area through their arrangement, and contain receiving portions for mask sheet positioning. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity while achieving improved positioning precision.
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 configuration ensures accurate positioning of the mask sheet, improves the flatness of the mask frame, and enhances the precision of the deposition process in display apparatus manufacturing.
Implementation Method 1
gas may be sprayed from the mask stage to lift the mask frame and reduce friction between the mask stage and the mask frame
Data Source
AI summary
A mask assembly includes a mask frame including a plurality of ribs including a first rib extending in a first direction, the plurality of ribs defining an opening area, and a mask sheet disposed on a first surface of the first rib and covering the opening area, where the mask frame further includes a plurality of receiving portions disposed on a second surface of the first rib, and spaced apart from each other in a longitudinal direction of the first rib, the second surface being opposite to the first surface.