Mask Frame Assembly Welding Apparatus for Flexible Displays
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Solution Overview
Problem
The manufacturing of mask frame assemblies for flexible display apparatuses faces challenges in achieving precise alignment and adhesion of masks with deposition patterns onto frames, leading to defects and reduced production yield due to varying gaps and uneven contact surfaces.
Innovation Solution
A manufacturing apparatus comprising an extending unit, a gap measuring unit, a pressurizing unit, and a welding unit that measures gaps between the mask and frame, applies differential forces for precise alignment, and welds the mask onto the frame to ensure close contact and improved adhesion, thereby enhancing deposition precision and yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional manufacturing methods are used to attach masks to frames, then the manufacturing process is simple, but the alignment precision and adhesion quality are poor leading to defects
Solution Approach 1:
The manufacturing process is divided into distinct sequential steps: extending the mask, measuring gaps, applying differential pressure, and welding. Each step addresses specific alignment and adhesion requirements independently, improving overall precision without creating a monolithic complex system.
Solution Approach 2:
The mask is extended in advance before attachment to the frame. This preliminary action pre-compensates for potential gaps and ensures the mask is in its final configuration before the attachment process, thereby improving alignment precision without requiring complex real-time adjustment mechanisms.
2Manufacturing precision
If uniform pressure is applied during mask attachment, then the process is simple, but gaps between mask and frame cannot be effectively reduced
Solution Approach 1:
Different pressing portions apply different amounts of force to different regions of the mask based on local gap measurements. This localized differential pressure effectively reduces gaps in specific areas without requiring a completely complex overall system, as each pressing portion can be independently controlled.
Solution Approach 2:
A gap measuring unit measures the gaps between the mask and frame before pressurization. This measurement feedback is used to control the pressing portions to apply appropriate differential forces, creating a closed-loop system that improves gap reduction effectiveness.
3Manufacturing precision
If the mask is not precisely aligned and adhered to the frame, then the manufacturing process is faster, but deposition precision deteriorates leading to reduced yield
Solution Approach 1:
The mask is extended and precisely aligned to the frame before the deposition process begins. This preliminary alignment ensures that the deposition patterns will be accurately positioned, thereby improving deposition precision without significantly extending the overall manufacturing cycle time.
Solution Approach 2:
The alignment and adhesion process is segmented into distinct steps (extending, gap measuring, differential pressurizing, welding) that can be efficiently executed in sequence. This segmentation allows for precise alignment without creating excessive process complexity or time consumption.
4Reliability
If simple attachment methods are used, then the manufacturing apparatus is less complex, but adhesion quality is poor causing defects
Solution Approach 1:
The attachment process is divided into multiple controlled steps: extending the mask, measuring gaps, applying differential pressure through multiple pressing portions, and welding. This segmentation ensures reliable adhesion at each stage without requiring an overly complex integrated system.
Solution Approach 2:
The mask is extended and precisely positioned before attachment to ensure proper alignment. This preliminary action prevents adhesion defects that would otherwise require complex correction mechanisms, thereby improving reliability without proportionally increasing apparatus complexity.
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 apparatus effectively reduces defects and improves production yield by ensuring precise alignment and adhesion of masks to frames, enhancing the precision of deposition patterns and overall manufacturing process efficiency.
Implementation Method 1
a welding unit configured to weld the mask to affix the mask onto the frame
Implementation Method 2
a pressurizing unit configured to apply different amounts of force to the mask in response to the gap measured by the gap measuring unit
Data Source
AI summary
Exemplary embodiments provide an apparatus to manufacture a mask frame assembly, including: extending unit configured to extend both ends of a mask in a first direction and arrange the mask on a frame, the mask including a deposition pattern and the frame including an opening; a pressurizing unit including a plurality of pressing portions the plurality of pressing portions configured to independently press the mask toward the frame; and a welding unit configured to weld the mask to affix the mask onto the frame.