Deposition Mask Picker Layout for Flat Loading and Welding
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Solution Overview
Problem
Defects occur in display devices due to improper loading of deposition masks, where the masks are not loaded flatly on the frame, causing components to be formed at incorrect positions.
Innovation Solution
A loading apparatus for a deposition mask featuring a clamper with a picker that includes a first and second adsorption part to adsorb both ends and a central portion of the mask, ensuring it is transferred and loaded in a flat state, using vacuum or magnetic force, and a clamper with grooves to maintain flatness during clamping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the mask is transferred using a simple picker without multiple adsorption parts, then the device complexity is reduced, but the manufacturing precision deteriorates because the mask cannot be maintained in a flat state during transfer
Solution Approach 1:
The picker is divided into multiple adsorption parts (first adsorption part and second adsorption part) that can independently adsorb different regions of the mask. This segmentation allows each adsorption part to apply force at specific locations, thereby maintaining the mask in a flat state during transfer while avoiding the need for a complex overall structure
2Manufacturing precision
If the clamper applies strong clamping force to ensure the mask is held flat, then the manufacturing precision is improved, but the mask may deform or damage due to excessive force
Solution Approach 1:
The clamper applies clamping force locally at specific positions rather than uniformly across the entire mask. By concentrating clamping force only at necessary locations, the mask is held flat during welding without subjecting the entire mask to excessive force that could cause deformation or damage
3Manufacturing precision
If the picker adsorbs only the ends of the mask, then the adsorption structure is simplified, but the mask sags in the middle portion causing loss of flatness
Solution Approach 1:
The adsorption function is segmented into multiple adsorption parts positioned at different locations on the mask. The first adsorption part adsorbs one end, the second adsorption part adsorbs the other end, and a third adsorption part adsorbs the middle portion. This segmentation prevents sagging in the middle while maintaining a relatively simple overall structure
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 ensures the mask is welded to the frame in a flat state, enhancing the reliability of the deposition mask loading process and preventing defects in the display device.
Implementation Method 1
The first adsorption part may adsorb the mask using vacuum
Implementation Method 2
The second adsorption part may adsorb the mask using vacuum or magnetic force
Data Source
AI summary
A loading apparatus for a deposition mask includes a clamper that clamps the mask extending in a direction, a first adsorption part, a second adsorption part, and a connection part connected to the first adsorption part and the second adsorption part, and includes a picker that transfers the mask. In case that the picker transfers the mask, the first adsorption part adsorbs ends of the mask, the second adsorption unit adsorbs a portion between the ends of the mask, and the clamper clamps the mask between the first adsorption part and the second adsorption part.