Metal Oxide Dispersion Composition for Gap-Fill Film Coating
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Solution Overview
Problem
Existing metal oxide films struggle with gap-fill characteristics when applied to substrates with irregularities such as holes or trenches, necessitating improved filling capabilities.
Innovation Solution
A metal oxide dispersion comprising carboxylic acids with 9 or more carbon atoms or boiling points of 250°C or higher, surface-treated nanoparticles, and a solvent, combined with a heating step at 165°C or higher, enhances gap-fill characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional metal oxide dispersion is used for coating substrates with irregularities, then the coating process is simple, but the gap-fill characteristics are poor
Solution Approach 1:
The patent changes the chemical composition parameters of the dispersion by introducing carboxylic acids with 9 or more carbon atoms (having high boiling points of 250°C or more). These specific carboxylic acid components modify the dispersion's rheological properties, enabling it to fill gaps and irregularities on substrates effectively while maintaining coating uniformity.
Solution Approach 2:
The patent creates a composite dispersion system combining metal oxide nanoparticles, capping agents, solvents, and specifically selected carboxylic acids (with 9+ carbon atoms). This composite formulation synergistically improves gap-fill characteristics by combining the surface treatment effects of capping agents with the high-boiling-point carboxylic acids that provide excellent filling behavior.
2Manufacturing precision
If heating temperature is increased to improve film formation, then film quality improves, but energy consumption increases
Solution Approach 1:
The patent optimizes the heating temperature parameter to 165°C or higher, which is sufficient to achieve complete solvent removal and film formation. The specific carboxylic acid composition (with boiling points ≥250°C) allows effective film formation at this temperature, balancing film quality with energy efficiency by avoiding excessive heating.
Solution Approach 2:
The patent replaces the need for high-energy mechanical mixing or extended drying processes with a controlled thermal treatment at 165°C. The specific dispersion composition enables effective film formation through this moderate heating step, substituting more energy-intensive methods with an optimized thermal process.
Data Source
AI summary
Provided is a metal oxide dispersion having excellent gap-fill performance, and a method of manufacturing a metal oxide film using the same. A metal oxide dispersion according to a first aspect of the present invention contains carboxylic acid having 9 or more carbon atoms, metal oxide nanoparticles surface-treated with a capping agent, and a solvent. A metal oxide dispersion according to a second aspect of the present invention contains carboxylic acid having a boiling point of 250° C. or higher at an atmospheric pressure, metal oxide nanoparticles surface-treated with a capping agent, and a solvent. A method of manufacturing a metal oxide film according to a third aspect of the present invention comprises: a step for forming a coating film formed of the metal oxide dispersion described above; and a step for heating the coating film at a temperature of 165° C. or higher.