Mask Frame Assembly With Heat Dissipation Plate for Pixel Accuracy
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Solution Overview
Problem
Mask frames used in display device manufacturing deform due to heat during deposition processes, leading to inaccuracies in pixel position and deposition of organic materials.
Innovation Solution
A mask frame design incorporating a support substrate with inner side surfaces and a heat dissipation plate, where fixing portions with adhesive properties are placed between the substrate and the heat dissipation plate to reduce heat transfer, using materials like Ag, Al, Cu, Cr, and Sn with low emissivity, and spaced apart to prevent deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the mask frame is used during deposition processes, then organic materials can be deposited on the substrate through the mask openings, but the mask frame deforms due to heat leading to pixel position errors
Solution Approach 1:
The mask frame is divided into multiple components: a support substrate, a heat dissipation plate, and multiple fixing portions. This segmentation allows the heat dissipation plate to be separated from the support substrate by the fixing portions, reducing heat transfer to the support substrate and preventing deformation that would cause pixel position errors
Solution Approach 2:
The fixing portions act as intermediary elements between the heat dissipation plate and the support substrate. These fixing portions with adhesive portions attach the heat dissipation plate to the support substrate while maintaining a spaced-apart relationship, serving as a mediator that reduces direct heat transfer while still providing structural support
2Strength
If the heat dissipation plate is attached directly to the support substrate, then structural support is improved, but heat transfer increases causing deformation
Solution Approach 1:
The fixing portions are locally positioned between the heat dissipation plate and support substrate at specific adhesive portions. This local attachment provides structural support only where needed while maintaining spacing in other areas, allowing selective heat blockage without compromising overall structural integrity
Solution Approach 2:
The fixing portions serve as intermediary elements that provide both mechanical attachment and thermal isolation. The adhesive portions create localized bonding points for structural support while the spaced-apart configuration of the fixing portions interrupts direct heat conduction paths
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 solution effectively reduces heat-induced deformation of the mask frame, enhancing deposition accuracy and maintaining pixel position precision during the manufacturing process.
Implementation Method 1
a plurality of adhesive portions attaching the support substrate to the heat dissipation plate
Implementation Method 2
A heat dissipation plate is disposed on the plurality of inner side surfaces
Data Source
AI summary
A mask frame includes a support substrate including a plurality of inner side surfaces. The plurality of inner side surfaces defines a first opening through the support substrate. A heat dissipation plate is disposed on the plurality of inner side surfaces. A plurality of fixing portions is disposed between the support substrate and the heat dissipation plate. The plurality of fixing portions includes a plurality of adhesive portions attaching the support substrate to the heat dissipation plate.