Functional Polymer Composition for Selective Sub-30 Nm Patterning
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Solution Overview
Problem
Conventional lithography methods face technical difficulties in forming fine patterns with line widths less than 30 nm due to optical limitations, necessitating a more precise and selective method for microfabrication in semiconductor devices.
Innovation Solution
A composition comprising a polymer with specific functional groups and a solvent is applied to a base material, allowing for the formation of a chemically modified film that is regionally selective and wet detachable, providing superior blocking performance against metal oxide formation during ALD or CVD processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional lithography methods are used, then manufacturing process is simple, but manufacturing precision deteriorates for line widths less than 30 nm
Solution Approach 1:
The patent introduces a polymer composition as an intermediary material that selectively modifies metal regions on the substrate. This polymer layer acts as a mediator between the substrate and subsequent processing steps, enabling precise pattern formation without requiring complex lithography equipment. The polymer selectively adsorbs to metal regions and provides a foundation for controlled metal oxide formation, achieving sub-30nm precision through chemical selectivity rather than optical resolution.
Solution Approach 2:
The invention changes the fundamental parameter from optical resolution (lithography wavelength and numerical aperture) to chemical selectivity (polymer-metal interaction). By transforming the patterning mechanism from physical/optical to chemical, the system achieves higher precision at smaller dimensions. The polymer composition parameters (functional groups, molecular weight, solvent selection) are optimized to control selectivity and pattern fidelity.
2Manufacturing precision
If selective modification method is used, then manufacturing precision improves, but ease of operation deteriorates
Solution Approach 1:
The patent extracts the selective modification function into a standalone polymer composition that can be independently optimized and applied. Rather than integrating selectivity control into complex lithography tools, the selective modification capability is separated into a discrete material system. This extracted polymer layer can be applied using simple coating techniques and removed selectively, simplifying the overall operational workflow while maintaining high precision.
Solution Approach 2:
The polymer composition functions as a temporary, disposable layer that is applied, serves its selective modification purpose, and then removed. This disposable nature eliminates the need for complex equipment and complex removal processes - the polymer is designed to be easily deposited and easily removed after serving its function, greatly improving ease of operation while maintaining pattern precision.
3Manufacturing precision
If polymer with specific functional groups is used, then manufacturing precision improves through selective modification, but loss of substance increases due to wet detachment requirement
Solution Approach 1:
The patent employs local quality by designing the polymer with specific functional groups (carboxyl, hydroxyl, or amine groups) that provide selective affinity only for metal regions. This localized chemical functionality ensures the polymer modifies only where needed (metal regions) while being easily removable from non-metal regions. The selective local interaction minimizes overall material loss by concentrating the polymer's action only where modification is required, rather than requiring complete coverage and removal.
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 the formation of a film that is regionally selective and wet detachable, enhancing microfabrication capabilities in semiconductor devices by improving the selectivity and blocking performance against metal oxide formation.
Implementation Method 1
a composition includes a polymer and a solvent. The polymer includes a group (X) which is at least one selected from the group consisting of: a group including at least two cyano groups; a group including —B(OR)2; a group including —PO(OR)2; and a group including —P(OR)2
Implementation Method 2
applying a composition directly or indirectly on a base material to form a coating film, and heating the coating film
Data Source
AI summary
A composition includes a polymer and a solvent. The polymer includes a group (X) which is at least one selected from the group consisting of: a group including at least two cyano groups; a group including —B(OR)2; a group including —PO(OR)2; and a group including —P(OR)2. Each R independently represents a hydrogen atom or a monovalent hydrocarbon group having 1 to 10 carbon atoms. The polymer preferably includes the group (X) at an end of a main chain thereof or at an end of a side chain thereof.