Self-Assembled Nucleic Acid Templates for Low-Defect Nanostructures
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Solution Overview
Problem
Conventional lithographic processes face challenges in fabricating nanostructures with dimensions less than 50 nm due to high costs and inefficiencies, and self-assembled block copolymer materials often result in nanostructures with insufficiently low defect levels.
Innovation Solution
The use of self-assembled nucleic acids, which are designed and synthesized to form predetermined structures, are repaired using specific repair enzymes to reduce defect density, and then transferred to a substrate as nano-scale templates or masks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional lithographic processes are used to fabricate nanostructures with dimensions less than 50 nm, then manufacturing precision can be achieved, but device complexity and cost increase significantly
Solution Approach 1:
The patent employs self-assembled block copolymers that automatically organize into nanoscale patterns through spontaneous self-assembly, eliminating the need for complex lithographic equipment and processes. The block copolymers serve themselves to create the desired nanostructure patterns without external intervention at the nanoscale level
Solution Approach 2:
The patent replaces mechanical lithographic systems with chemical self-assembly processes. Instead of using physical lithography tools to pattern nanostructures, the system uses chemical interactions between block copolymer segments to spontaneously form the desired patterns
2Device complexity
If self-assembled block copolymer materials are used to fabricate nanostructures, then device complexity is reduced, but manufacturing precision deteriorates due to high defect levels
Solution Approach 1:
The patent modifies key parameters of the block copolymer system including composition ratios, molecular weights, and processing conditions to optimize self-assembly behavior and minimize defects. By carefully controlling these parameters, the system achieves both low complexity and high precision
Solution Approach 2:
The patent uses composite block copolymer materials with specifically designed segment compositions that enhance self-assembly quality and reduce defects. The composite nature of block copolymers with different functional segments enables simultaneous achievement of pattern fidelity and defect reduction
3Manufacturing precision
If conventional lithographic processes are used, then manufacturing precision is maintained, but productivity decreases due to slow fabrication speeds
Solution Approach 1:
The self-assembling block copolymers automatically form patterns without requiring slow, sequential lithographic steps. The spontaneous self-assembly process occurs rapidly and simultaneously across the entire substrate area, dramatically increasing fabrication throughput while maintaining precision
Solution Approach 2:
The block copolymers are pre-synthesized with built-in self-assembly instructions encoded in their molecular structure. This preliminary design allows them to automatically form correct patterns upon deposition, eliminating the need for slow, step-by-step lithographic patterning
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 the fabrication of nanostructures with low defect densities and dimensions less than 50 nm, facilitating the production of semiconductor devices with improved precision and efficiency.
Implementation Method 1
self-assembled block copolymer lithography
Implementation Method 2
The specificity of complementary base pairing in nucleic acids provides self-assembled nucleic acids that may be used for self-assembled nucleic acid lithography processes
Implementation Method 3
repairing defects in the self-assembled nucleic acids
Data Source
AI summary
A method of forming a structure comprises forming a pattern of self-assembled nucleic acids over a material. The pattern of self-assembled nucleic acids is exposed to at least one repair enzyme to repair defects in the pattern. The repaired pattern of self-assembled nucleic acids is transferred to the material to form features therein. A method of decreasing defect density in self-assembled nucleic acids is also disclosed. Self-assembled nucleic acids exhibiting an initial defect density are formed over at least a portion of a material and the self-assembled nucleic acids are exposed to at least one repair enzyme to repair defects in the self-assembled nucleic acids. Additional methods are also disclosed.