Imprint Template Peripheral Quality Assessment
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Solution Overview
Problem
The uniformity of nanoimprint patterns becomes a key issue when scaling up nanoimprint lithography, as it is challenging to monitor and detect the quality of nanometer-scale patterns due to their miniaturization, especially in the range of nanometer line widths.
Innovation Solution
An imprint template with a first region for imprinting a film layer pattern and a second region for imprinting a peripheral film layer pattern is used, where the second pattern's shape data is measured to assess the completion degree and quality of the first pattern, allowing for indirect evaluation without damaging the product pattern.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the pattern size is reduced to nanometer scale to achieve higher resolution, then the manufacturing precision is improved, but the difficulty of detecting and measuring the pattern quality increases
Solution Approach 1:
The patent introduces a second film layer pattern as an intermediary object for detection. This second pattern serves as a mediator that indirectly reflects the imprint quality of the first pattern, allowing measurement without directly measuring the nanometer-scale product pattern itself. The second pattern acts as a proxy that translates hard-to-measure nanometer features into more measurable forms.
Solution Approach 2:
The patent creates a copy (second film layer pattern) that replicates the imprinting process results. Instead of measuring the original product pattern directly, a copied pattern is formed that can be measured to infer the quality of the original. This copying approach allows indirect assessment of imprint quality through a replicated structure.
2Measurement precision
If the second film layer pattern is used for measurement, then the measurement capability is improved, but the device complexity increases
Solution Approach 1:
The patent merges two functions into a single imprint template: the first imprint structure for product pattern formation and the second imprint structure for quality indication. By combining these functions in one template, the system avoids needing separate measurement devices, reducing overall system complexity despite the added template features.
Solution Approach 2:
The imprint template is designed with multi-functionality, serving both as a product manufacturing tool (first imprint structure) and a quality assessment tool (second imprint structure). This universal design eliminates the need for separate measurement equipment, as the same template performs both fabrication and quality indication functions.
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 method enables effective assessment of imprint quality at the nanometer scale without affecting the substrate product, ensuring high-quality substrates and facilitating the detection of hyperfine nanometer-scale patterns by using a second film layer pattern with a larger size for measurement.
Implementation Method 1
who imprinted and copied nanometer patterns onto a silicon substrate coated with a polymer material with a mechanical force (high temperature, high pressure) by using a template having the nanometer patterns
Implementation Method 2
measuring shape data of the second film layer pattern on the target substrate; determining a completion degree of imprinting the second film layer pattern based on the measured shape data
Data Source
AI summary
An imprint template includes a first region and a second region located in the periphery of the first region. The first region is provided with a first imprint structure configured to imprint a first film layer pattern into a base material in a product region of a target substrate. The second region is provided with a second imprint structure configured to imprint a second film layer pattern into the base material in the periphery of the product region of the target substrate. And the second film layer pattern is used for assessing imprint quality of the first film layer pattern.