Mask Orientation for Substrate Patterning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The complexity of masks used in substrate patterning increases processing costs and reduces throughput, particularly when forming patterns at non-standard angles.
Innovation Solution
A method involving the positioning of multiple masks in a specific layout over a substrate, where the masks have edges aligned with standard angles, and energy is directed through these masks to form patterned features that align with standard angles, reducing the need for complex and costly mask fabrication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If masks are used to transfer patterns to substrates with complex pattern orientations, then pattern formation accuracy is improved, but mask complexity and production costs increase
Solution Approach 1:
The patent divides the substrate into multiple discrete areas, each with its own mask and pattern orientation. This segmentation allows each mask to be simpler while collectively covering complex pattern requirements across the substrate. The plurality of masks are positioned at different locations and orientations to form patterns in different areas independently.
Solution Approach 2:
The patent applies different mask orientations and configurations to different areas of the substrate based on local pattern requirements. Each area receives customized patterning optimized for its specific feature set, rather than using a single complex mask for the entire substrate. This local optimization reduces individual mask complexity while maintaining overall pattern accuracy.
2Manufacturing precision
If complex masks with many features are used, then pattern formation capability is improved, but processing throughput decreases
Solution Approach 1:
The patent segments the patterning process into multiple independent mask applications, each handling specific areas. This allows parallel or sequential processing of different substrate regions with simpler masks, improving throughput compared to using a single complex mask that would require more sophisticated alignment and exposure procedures.
Solution Approach 2:
The patent applies patterning to multiple discrete areas rather than attempting to pattern the entire substrate in a single step. This partial action approach allows each mask to be optimized for its specific area, reducing complexity and enabling faster processing while collectively achieving comprehensive substrate patterning.
3Adaptability or versatility
If patterns are formed at nonstandard angles relative to alignment features, then design flexibility is improved, but mask fabrication complexity increases
Solution Approach 1:
The patent deliberately uses asymmetric mask orientations at various angles (0°, 45°, 90°, 135°) relative to substrate alignment features. This asymmetric arrangement provides design flexibility for forming patterns at different orientations while keeping each individual mask fabricationally simple, as each mask maintains standard geometric features aligned with its local coordinate system.
Solution Approach 2:
The patent changes the orientation parameter of masks across different areas of the substrate. By varying mask angles and positions according to local pattern requirements, the system achieves design flexibility without requiring any single mask to be fabricated at complex nonstandard angles. Each mask uses standard fabrication angles relative to its own orientation.
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 approach significantly reduces the cost of mask production by allowing fewer, larger electron beam exposure shots, thereby enhancing throughput and reducing processing costs.
Implementation Method 1
photolithography can be used to transfer patterns in the masks to a photoresist disposed on the substrate
Implementation Method 2
a lower number of larger electron beam exposure shots can be used to form patterns in masks
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3
AI summary
A method of forming patterned features on a substrate is provided. The method includes positioning a plurality of masks arranged in a mask layout over a substrate. The substrate is positioned in a first plane and the plurality of masks are positioned in a second plane, the plurality of masks in the mask layout have edges that each extend parallel to the first plane and parallel or perpendicular to an alignment feature on the substrate, the substrate includes a plurality of areas configured to be patterned by energy directed through the masks arranged in the mask layout. The method further includes directing energy towards the plurality of areas through the plurality of masks arranged in the mask layout over the substrate to form a plurality of patterned features in each of the plurality of areas.