Group 5 Metal Precursors for Areal-Selective Thin-Film Formation
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Solution Overview
Problem
Existing thin film deposition methods struggle to achieve areal selective formation with high thermal stability and low growth per cycle, leading to inefficient processes and increased costs due to the need for subsequent etching and potential leakage current.
Innovation Solution
A method involving substrate preparation, precursor supply, purge steps, and thin film formation using Group 5 metal precursor compounds represented by Chemical Formula 1, optionally with a selectivity material, to selectively form thin films on specific areas, thereby omitting etching processes and minimizing deposition in non-growth areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional thin film deposition methods are used, then thin films can be formed on substrates, but the films deposit on both growth and non-growth areas requiring subsequent etching processes
Solution Approach 1:
The patent applies local quality by modifying the precursor compound structure to create different reactivity characteristics. The Group 5 metal precursor compound with specific ligand structures (Formula 1) exhibits selective reactivity toward certain substrate materials in specific areas, enabling areal-selective film formation without requiring etching processes. The ligand design (R1, R2, R3 alkyl groups and X halogen atoms) creates local chemical environment differences that drive selective deposition.
2Stability of the object's composition
If conventional precursors are used, then deposition can proceed, but thermal stability is poor and growth per cycle is high
Solution Approach 1:
The patent applies parameter changes by systematically modifying the precursor compound's chemical structure parameters. The Group 5 metal precursor compound (Formula 1) uses specific ligand combinations (alkyl groups R1-R3 and halogen atoms X) that tune the decomposition temperature and reactivity. This structural parameter optimization achieves both low GPC (controlled reaction rate) and high thermal stability (stable film formation) simultaneously.
Solution Approach 2:
The patent employs composite material principles by creating a precursor compound that combines Group 5 metal center with organic ligand structures. The composite structure of metal atom coordinated with alkyl groups and halogen atoms provides synergistic effects: the organic ligands control decomposition kinetics (low GPC) while the metal center ensures thermal stability of the resulting thin film.
3Reliability
If deposition occurs on non-growth areas, then material is wasted and leakage current increases
Solution Approach 1:
The patent applies preliminary anti-action by designing the precursor compound to inherently prevent unwanted deposition before it occurs. The Group 5 metal precursor compound (Formula 1) has selective reactivity that actively avoids bonding with non-growth area substrates. This preliminary chemical selectivity prevents material waste and leakage current generation by stopping deposition at the molecular level rather than requiring post-processing 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
The method enables high-quality, areal-selective thin film formation with improved selectivity, reducing manufacturing time and costs by suppressing unwanted deposition, and minimizing leakage current.
Implementation Method 1
a precursor supply step of supplying a metal precursor compound into the chamber and adsorbing the metal precursor compound to the substrate
Implementation Method 2
a thin film formation step of supplying a reaction material into the chamber to react with the metal precursor compound and form a thin film
Data Source
AI summary
Provided is a method for areal selective forming of a thin film according to an exemplary embodiment of the present disclosure including: a substrate preparation step of supplying and stabilizing a substrate including a growth area and a non-growth area into a chamber; a precursor supply step of supplying a metal precursor compound into the chamber and adsorbing the metal precursor compound to the substrate; a purge step of purging the inside of the chamber; and a thin film formation step of supplying a reaction material into the chamber to react with the metal precursor compound and form a thin film, in which the metal precursor compound is a Group 5 metal precursor compound represented by Chemical Formula 1 below: