Chemically Amplified Resist Composition for Fine Pattern Formation
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Solution Overview
Problem
Existing resist compositions struggle to achieve high sensitivity, resolution, and roughness reduction simultaneously in the formation of fine resist patterns for semiconductor and liquid crystal display elements, particularly with advancements in lithography technology and miniaturization.
Innovation Solution
A resist composition containing a resin component with a specific constitutional unit and an acid generator component, which generates acid upon exposure, enhancing solubility differences in developing solutions to form precise patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional resist compositions are used for fine pattern formation, then sensitivity can be improved, but resolution and roughness deteriorate
Solution Approach 1:
The patent uses a composite resin system comprising multiple specific resin components (a01, a1, a2, a3, a4) with different functional groups and molecular structures. This composite approach allows simultaneous optimization of sensitivity (through acid generator interaction), resolution (through controlled solubility changes), and roughness (through film uniformity) that cannot be achieved with single resin systems.
Solution Approach 2:
The patent systematically adjusts critical parameters including the molecular weight distribution of resins, the ratio of different resin components, the concentration and type of acid generators, and the structural parameters of constitutional units. These parameter optimizations enable the resist to achieve high sensitivity while maintaining fine resolution and low roughness for patterns of 110nm and below.
2Use of energy by moving object
If conventional resist compositions are used for fine pattern formation, then sensitivity can be improved, but roughness deteriorates
Solution Approach 1:
The patent employs a composite resin system with specifically designed components that work synergistically to reduce roughness while maintaining sensitivity. The combination of resins with different glass transition temperatures, molecular weights, and functional groups creates a more uniform film structure that resists roughness formation during development, even as pattern dimensions shrink to 110nm and below.
Solution Approach 2:
The patent introduces resin components with specific local molecular structures and functional groups that provide localized properties beneficial for roughness control. Certain constitutional units are designed to interact specifically with acid generators in controlled zones, creating uniform solubility changes that prevent rough edge formation during development while preserving high sensitivity.
3Manufacturing precision
If pattern size is reduced for miniaturization, then resolution requirement increases, but sensitivity and roughness control become more difficult
Solution Approach 1:
The patent uses a composite resin system specifically optimized for sub-110nm patterning. The multiple resin components work together to provide the high resolution needed for miniaturized patterns while maintaining sensitivity through controlled interactions with acid generators. The composite structure allows fine-tuning of lithographic properties to achieve the required resolution for advanced semiconductor devices.
Solution Approach 2:
The patent optimizes critical parameters including resin molecular weight distribution, constitutional unit structure, acid generator concentration and type, and additive compositions. These parameter adjustments are specifically tailored to maintain sensitivity while achieving the high resolution required for pattern sizes of 110nm and below, overcoming the typical trade-offs that occur during lithography miniaturization.
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 composition achieves improved sensitivity, resolution, and reduced roughness in forming fine resist patterns, suitable for advanced lithography processes.
Implementation Method 1
an acid generator component (B) generating acid upon exposure
Implementation Method 2
a chemically amplified resist composition which contains a base material component exhibiting changed solubility in a developing solution under action of acid
Data Source
AI summary
A resist composition containing a resin component (A1) having a constitutional unit (a01) derived from a compound represented by General Formulae (a0-1) and one or more compounds selected from the group consisting of a compound (B01) represented by General Formula (b0-1) and a compound (B02) represented by General Formula (b0-2), W01 represents a polymerizable group-containing group, Ya01 represents a single bond or the like, Rx01 represents an acid dissociable group, Rb1 and Rb4 represents an aryl group having a fluorine atom, Rb2, Rb3, and Rb5 represents an aryl group or the like which may have a substituent, and X01<sup2>−</sup2> and X02<sup2>−</sup2> represents a counter anion