Block Copolymer Self-Assembly for Sub-10nm Lithography
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Solution Overview
Problem
Conventional lithography techniques face limitations in achieving pattern resolutions below 22 nanometers due to technical constraints, particularly in forming patterns less than or equal to 10 nanometers, and require expensive equipment and long scanning times, while also struggling with line edge roughness and scalability in device integration.
Innovation Solution
A nano-structured block copolymer with a solubility parameter difference of at least 5 MPa1/2 between its block structural units, capable of self-assembly on a substrate, is developed, allowing for pattern resolutions of less than or equal to 10 nanometers and improved line edge roughness through solvent annealing and plasma treatment processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional optical lithography is used, then the process is simple and pattern tunability is free, but pattern resolution cannot achieve sub-22 nanometer levels
Solution Approach 1:
The patent introduces block copolymer as an intermediary self-assembly material that mediates between the lithography process and the final pattern. The block copolymer forms nanoscale domains through self-assembly, acting as a bridge to achieve sub-22nm resolution without requiring complex lithography equipment. The different blocks selforganize into periodic structures that define the final pattern dimensions.
Solution Approach 2:
The block copolymer performs self-service by automatically organizing into ordered nanoscale structures through self-assembly. The system uses the inherent thermodynamic drive for phase separation between incompatible polymer blocks to spontaneously form the desired pattern, eliminating the need for complex external guidance or expensive lithography tools.
2Manufacturing precision
If electron beam or X-ray beam lithography is used, then sub-22 nanometer patterns can be achieved, but scanning time is long and equipment cost is high
Solution Approach 1:
The block copolymer system performs self-service by automatically organizing into ordered nanoscale structures through self-assembly. The system uses the inherent thermodynamic drive for phase separation between incompatible polymer blocks to spontaneously form the desired pattern, eliminating the need for complex external guidance or expensive lithography tools.
Solution Approach 2:
The patent replaces the mechanical scanning process of electron beam or X-ray lithography with a chemical self-assembly process. Instead of physically scanning high-energy beams across the substrate, the system uses molecular-level selforganization driven by thermodynamic forces, dramatically reducing processing time and equipment requirements.
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 nano-structured block copolymer enables the formation of patterns with reduced line edge roughness and tunable morphology, overcoming the limitations of conventional lithography by achieving high-resolution patterns without the need for expensive equipment, thus enhancing device integration and performance.
Implementation Method 1
a self-assembled block copolymer disposed on a substrate
Implementation Method 2
capable of self-assembly on a substrate, is developed, allowing for pattern resolutions of less than or equal to 10 nanometers and improved line edge roughness through solvent annealing
Data Source
AI summary
A nano-structured block copolymer that includes a self-assembled block copolymer disposed on a substrate, wherein the block copolymer includes a plurality of block structural units, and at least two block structural units have a solubility parameter difference of greater than or equal to about 5 megaPascal1/2.