Inline Metrology for Adaptive Lithographic Wiring Alignment
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Solution Overview
Problem
Existing microlithography systems face challenges in accurately placing wiring between components due to misalignment during processing, leading to out-of-specification or non-functional components, which affects the economic viability of the lithography process.
Innovation Solution
A method for determining altered electrical connections based on offsets between designed and actual component placements, using in-situ scanning and photoresist development to form and adjust wiring templates, and detecting misaligned regions before depositing wiring material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If static wiring placement is used based on designed component positions, then wiring alignment is simplified, but misalignment occurs when components are displaced during processing
Solution Approach 1:
The patent transitions from static wiring placement to dynamic adaptive wiring placement. The system scans component positions after assembly, detects misalignments, and adjusts wiring paths in real-time to connect to actual component locations. This dynamic adaptation resolves the contradiction by making wiring placement responsive to actual component positions rather than relying on predetermined static paths.
Solution Approach 2:
The patent implements a feedback loop where component positions are scanned and measured after assembly, compared against designed positions, and used to generate corrected wiring paths. The system continuously monitors and adjusts wiring placement based on detected misalignments, ensuring accurate connections despite component displacement during processing.
2Manufacturing precision
If strict alignment specifications are enforced, then wiring connection accuracy is improved, but processing yield decreases due to rejection of slightly misaligned components
Solution Approach 1:
The patent changes the parameter of wiring path geometry from fixed to variable. Instead of enforcing strict alignment specifications that reject misaligned components, the system adapts wiring paths to accommodate actual component positions within tolerance ranges. This parameter change allows slightly misaligned components to be processed successfully, maintaining both accuracy and throughput.
Solution Approach 2:
The system dynamically adjusts wiring paths based on detected component positions, allowing flexible accommodation of misaligned components. Rather than using rigid alignment specifications, the adaptive wiring approach maintains connection accuracy while accepting a broader range of component positions, thereby improving processing yield without sacrificing quality.
3Manufacturing precision
If in-situ scanning and adaptive wiring adjustment are implemented, then wiring accuracy despite misalignment is improved, but processing time and system complexity increase
Solution Approach 1:
The patent performs component position scanning and wiring path calculation as preliminary actions before actual wiring deposition. By detecting misalignments and computing corrected paths in advance, the system prepares all adjustment data beforehand, allowing the actual wiring process to proceed efficiently without time-consuming adjustments during deposition.
Solution Approach 2:
The patent replaces physical trial-and-error alignment adjustments with computational modeling and digital path optimization. The system uses software algorithms to calculate corrected wiring paths based on scanned component positions, substituting mechanical adjustment iterations with rapid computational processing that reduces overall cycle time.
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
Enables accurate and adaptive wiring connections, reducing defects and increasing throughput by allowing systems to adapt to slight deviations in component placement, thus improving the overall efficiency and quality of the lithography process.
Implementation Method 1
a pattern generator exposes selected areas of the light-sensitive photoresist as part of a pattern with light to cause chemical changes to the photoresist
Data Source
AI summary
Aspects of disclosure provide a method for processing an apparatus. The method includes determining one or more altered electrical connections based on an offset between a designed component and an altered component disposed on a substrate. The method includes depositing a photoresist over the substrate and developing the photoresist to form one or more developed regions and one or more undeveloped regions. One of the one or more developed regions or the one or more undeveloped regions of the photoresist are removed to form an altered electrical connection template. The altered component and the altered electrical connection template are scanned to identify one or more misaligned regions of the altered electrical connection template. At least a portion of the altered electrical connections template is removed.