Resist Composition with Acid-Activated Resin for Exposure Margin
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Solution Overview
Problem
Conventional resist compositions fail to consistently meet exposure margins when producing resist patterns, leading to suboptimal results.
Innovation Solution
A resist composition comprising a resin with specific structural units and an acid generator, applied to a substrate, dried, exposed, heated, and developed to form a pattern, where the resin is insoluble in alkali aqueous solutions unless activated by acid, allowing for precise pattern formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional resist composition is used, then the resist pattern can be formed, but the exposure margin is not satisfied
Solution Approach 1:
The patent modifies the chemical structure of the resin by introducing specific structural units (formulas I and II) with particular functional groups and molecular architectures. This changes the chemical parameters of the resist composition to achieve both satisfactory exposure margin and reliable pattern formation, resolving the contradiction between precision and reliability
Solution Approach 2:
The patent creates a composite resist composition containing multiple resins with different structural units (formulas I and II) combined with an acid generator. This composite material approach allows the resist to exhibit both improved exposure margin and consistent pattern formation by leveraging the synergistic effects of different molecular components
2Ease of operation
If the resin is made soluble in alkali aqueous solution, then easy development is achieved, but dry etching resistance deteriorates
Solution Approach 1:
The patent employs a chemically active resin that dynamically changes its solubility properties. The resin is initially insoluble in alkali aqueous solution providing dry etching resistance, but becomes soluble upon acid activation during development, enabling easy pattern formation. This dynamic property resolution resolves the contradiction between development ease and etching resistance
Solution Approach 2:
The patent introduces resins with specific structural units that provide different local properties: some units confer acid-lability for controlled solubility change during development, while other units maintain hydrophobicity and structural integrity for dry etching resistance. This local quality differentiation allows the single resin to satisfy both contradictory 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 composition ensures improved solubility in alkali solutions upon acid activation, enhancing the resolution and dry etching resistance of the resist patterns, thereby addressing the exposure margin issues in conventional methods.
Implementation Method 1
an acid generator having a structural unit represented by the formula (II)... the resin is insoluble in alkali aqueous solutions unless activated by acid
Implementation Method 2
the resin... becoming soluble in an alkali aqueous solution by the action of an acid... heating the exposed composition layer
Data Source
AI summary
A resist composition having a resin having a structural unit represented by the formula (I), a resin being insoluble or poorly soluble in alkali aqueous solution, but becoming soluble in an alkali aqueous solution by the action of an acid and not including the structural unit represented by the formula (I), and an acid generator,wherein R1, A1, A13, A14, X12, Rb1, Rb2, Lb1, ring Wb1, Rb3, Rb4, m and Z1+ are defined in the specification.