Vanadium Precursor Composition for Stable, Low-Impurity Thin Film Deposition
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Solution Overview
Problem
Conventional vanadium precursor compounds lack thermal stability and high vapor pressure, leading to impurities and non-uniform thin films in semiconductor devices, making it difficult to form high-quality vanadium thin films suitable for next-generation electronics.
Innovation Solution
A vanadium precursor compound with an asymmetric cyclopentadiene ligand substituted with alkyl groups, allowing it to exist in a liquid state at room temperature and maintain high vapor pressure, facilitating deposition processes like MOCVD and ALD, resulting in a thin film with reduced impurities and uniform properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional vanadium precursor compounds are used, then the deposition process can be performed, but the thermal stability is insufficient and high impurity content occurs
Solution Approach 1:
The patent changes the molecular structure parameters of the vanadium precursor compound by introducing specific ligand configurations and substituents. This structural parameter change results in improved thermal stability while maintaining appropriate vapor pressure for deposition, thereby reducing impurity formation during the deposition process
Solution Approach 2:
The patent creates a composite molecular structure combining vanadium center with specifically designed organic ligands containing heterocyclic rings and aromatic groups. This composite structure provides both thermal stability and controlled volatility, solving the contradiction between stability and deposition capability
2Manufacturing precision
If conventional vanadium precursor compounds are used, then deposition can proceed, but the vapor pressure is insufficient leading to poor film quality
Solution Approach 1:
The patent optimizes the vapor pressure parameter by carefully selecting ligand types and substituents. The balanced molecular weight and intermolecular forces achieved through this design provide sufficient vapor pressure for effective deposition while maintaining film uniformity through stable precursor behavior
3Ease of manufacture
If conventional vanadium precursor compounds are used, then the process can be completed, but carbon impurities are introduced into the thin film
Solution Approach 1:
The patent introduces specific functional groups and heteroatoms (such as oxygen-containing groups) at specific positions in the ligand structure. These localized structural modifications reduce carbon impurity generation during decomposition while maintaining the overall processability and deposition characteristics of the precursor compound
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 vanadium precursor compound ensures high thermal stability and vapor pressure, enabling the formation of high-quality, uniform thin films with low carbon impurity content, suitable for semiconductor applications.
Implementation Method 1
the vanadium precursor compound according to an embodiment of the present disclosure has an advantage of having a high vapor pressure and excellent thermal stability
Implementation Method 2
depositing the thin film on a substrate through a metal organic chemical vapor deposition (MOCVD) process or an atomic layer deposition (ALD) process
Data Source
AI summary
An embodiment of the present disclosure provides a vanadium precursor compound represented by Chemical Formula 1 or 2.(In Chemical Formula 1, R1, R2, R3 and R4 are each independently selected from hydrogen, a linear alkyl group having 1 to 6 carbon atoms and a branched alkyl group having 3 to 4 carbon atoms, and in Chemical Formula 2, n is an integer of 0 to 4, a ring including a vanadium element is a heterocycloalkyl group or a heterocycloalkene group, and R1, R2, R3, R4, R5 and R6 are each independently selected from hydrogen, a linear alkyl group having 1 to 6 carbon atoms and a branched alkyl group having 3 to 6 carbon atoms.)