Ylide Organometallic Photoresist for Stable High-Resolution Patterning
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Solution Overview
Problem
The photolithography process for manufacturing integrated circuit devices faces challenges in maintaining process stability over time, achieving high etch resistance, and ensuring dimensional precision of patterns.
Innovation Solution
A photoresist composition is developed, comprising an organometallic compound with a central metal and organic ligands, including a ylide group, and a solvent. This composition improves process stability by suppressing changes over time and enhances etch resistance and resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional photoresist compositions are used, then the photolithography process can proceed, but process stability deteriorates due to changes over time
Solution Approach 1:
The patent changes the chemical parameters of the photoresist composition by introducing organometallic compounds with specific organic ligands (carboxylate, alkoxide, beta-diketonate) that form stable coordination complexes with central metals. This chemical parameter change suppresses degradation reactions and maintains composition stability over time, directly resolving the contradiction between process reliability and composition stability.
Solution Approach 2:
The patent creates a composite photoresist system combining central metals with organic ligands to form organometallic compounds. This composite structure leverages the stability of metal-ligand coordination bonds to prevent decomposition and maintain compositional integrity, thereby improving both process stability and resistance to changes over time.
2Reliability
If conventional photoresist compositions are used, then the photolithography process can proceed, but etch resistance is insufficient
Solution Approach 1:
The patent modifies the chemical composition parameters by incorporating organometallic compounds that form cross-linked networks upon exposure and baking. This changes the physical-chemical parameters of the cured resin, enhancing etch resistance and pattern strength simultaneously, thus resolving the contradiction between etch resistance and pattern strength.
3Manufacturing precision
If conventional photoresist compositions are used, then the photolithography process can proceed, but dimensional precision of patterns deteriorates
Solution Approach 1:
The patent optimizes chemical parameters by selecting specific organometallic compounds with controlled molecular weights and ligand structures. This enables precise control over the cross-linking density and network formation, which directly improves both dimensional precision and pattern resolution, resolving the contradiction between these two precision metrics.
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 photoresist composition effectively stabilizes the photolithography process, improves the dimensional precision of patterns, and enhances etch resistance and resolution, leading to more reliable and precise integrated circuit device manufacturing.
Implementation Method 1
an organic ligand precursor... capable of a ligand substitution reaction with at least one of the plurality of organic ligands bonded to the central metal
Implementation Method 2
inducing a desorption reaction of some of the plurality of organic ligands from the organometallic compound in the first region by bound baking
Implementation Method 3
inducing a condensation reaction of a hydroxyl (OH) functional group generated at the site where some of the plurality of organic ligands among the organometallic compounds are desorbed
Data Source
AI summary
A photoresist composition and a method of manufacturing an integrated circuit device using the photoresist composition includes an organometallic compound including a central metal and at least one organic ligand bonded to the central metal, and a solvent, wherein the at least one organic ligand included in the organometallic compound includes an ylide group including an atom with a formal charge of −1 coordinately bonded to the central metal and a hetero atom with a formal charge of +1 bonded to the atom with a formal charge of −1.