Resist Composition Acid-Generating Unit for Lithography Roughness
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Solution Overview
Problem
Existing resist compositions struggle to achieve high sensitivity and satisfactory roughness reducing properties in forming fine patterns for semiconductor elements and liquid crystal display elements.
Innovation Solution
A resist composition that generates an acid upon light exposure, with a resin component containing a constitutional unit derived from a specific compound, enhancing the solubility change in a developing solution due to the acid action.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a chemically amplified resist composition containing a resin with multiple constitutional units is used, then lithography characteristics such as sensitivity and resolution are improved, but both sensitivity and roughness reducing property are not sufficiently achieved
Solution Approach 1:
The patent applies local quality by introducing a specific constitutional unit (a01) with particular functional groups into the resin structure. This unit contains a cyclic group where -O-C(=O)- forms part of the ring skeleton, creating localized regions with enhanced acid generation and solubility modification properties. The specific structure with R01 as hydrogen or alkyl group, and L01 as divalent linking group, provides targeted improvement in both sensitivity and roughness reducing property without requiring changes to the overall resist composition architecture.
Solution Approach 2:
The patent employs parameter changes by modifying the chemical structure of the resin's constitutional units. The introduction of the cyclic group containing -O-C(=O)- as part of the ring skeleton changes the physical and chemical parameters of the resist material, including its acid response characteristics and solubility behavior in developing solutions. This structural parameter change enables simultaneous improvement of sensitivity and roughness reducing property.
2Manufacturing precision
If the wavelength of exposure light source is shortened to achieve pattern miniaturization, then resolution for reproducing minute patterns is improved, but sensitivity requirements become more stringent
Solution Approach 1:
The patent applies preliminary action by incorporating an acid generator component into the resist composition that pre-configures the system to generate acid upon light exposure. The specific resin structure with constitutional unit (a01) is designed to work synergistically with the acid generator, so that when exposure occurs, the acid generation and solubility modification happen rapidly and efficiently. This preliminary structural arrangement ensures high sensitivity even when using shorter wavelength light sources for higher resolution.
Solution Approach 2:
The patent uses composite materials by combining a resin with specific constitutional units (including unit a01 with the cyclic -O-C(=O)- group) with an acid generator component. This composite resist composition creates synergistic effects where the resin structure enhances acid generation efficiency and the acid generator provides the necessary chemical amplification. The composite structure enables the resist to maintain high sensitivity while achieving the resolution required for pattern miniaturization with shorter wavelength light sources.
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 resist composition achieves high sensitivity and improved roughness reducing properties, enabling the formation of fine patterns with enhanced lithography characteristics.
Implementation Method 1
a chemically amplified resist composition containing a base material component whose solubility in a developing solution is changed due to an action of an acid and an acid generator component that generates an acid upon light exposure
Data Source
AI summary
A resist composition including a resin component having a constitutional unit derived from a compound represented by General Formula (a0-1), in which R01 represents a hydrogen atom, L01 represents a divalent linking group, Ra01 and Ra02 each independently represent a hydrocarbon group which may have a substituent, Ar01 represents an aryl group in which some or all hydrogen atoms are substituted with iodine atoms, and the aryl group may have a substituent other than the iodine atoms