Recess Deposition Sequence for Uniform Step Coverage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional deposition methods face challenges in achieving uniform step coverage and productivity due to variations in the adsorption of organic raw materials on substrates with residual moisture, leading to inconsistent film thickness and quality.
Innovation Solution
A deposition method involving a substrate with recesses, where an organic raw material gas is adsorbed, oxidized by an oxygen-containing gas, and then treated with a dehydrating agent to desorb moisture, ensuring consistent adsorption and improved step coverage without extending the deposition cycle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional deposition methods are used without dehydrating agent treatment, then the deposition process is simpler and faster, but the adsorption of organic raw material varies due to residual moisture, resulting in poor step coverage and non-uniform film thickness
Solution Approach 1:
The dehydrating agent is supplied before the organic raw material gas to remove residual moisture from the substrate surface in advance. This preliminary dehydration action ensures that subsequent adsorption of organic raw material is uniform across the substrate surface, including recessed areas, thereby achieving good step coverage without complicating the overall deposition process
Solution Approach 2:
The dehydrating agent acts as an intermediary substance between the substrate and the organic raw material gas. It temporarily occupies the substrate surface to remove moisture, then desorbs to allow uniform adsorption of the organic raw material. This intermediary action resolves the contradiction by enabling precise film deposition without requiring complex process modifications
2Productivity
If conventional deposition methods are used without dehydrating agent treatment, then the deposition cycle is shorter, but variations in organic raw material adsorption lead to non-uniform film thickness and reduced productivity
Solution Approach 1:
The dehydrating agent treatment is performed as a preliminary step before organic raw material adsorption. This preliminary dehydration prevents adsorption variations caused by residual moisture, ensuring uniform film thickness from the first deposition cycle. The process achieves both high productivity and film uniformity by eliminating the need for repeated deposition cycles to correct thickness variations
Solution Approach 2:
The introduction of dehydrating agent changes the surface condition parameter (moisture content) of the substrate before deposition. By controlling this parameter through dehydration, the process achieves uniform adsorption and film thickness without extending the overall deposition cycle, thereby maintaining high productivity while improving manufacturing precision
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
This method ensures good step coverage and high productivity by reducing variations in organic raw material adsorption on substrate surfaces, resulting in uniform film thickness and quality across the substrate.
Implementation Method 1
supplying an organic raw material gas to the surface to adsorb the organic raw material gas to the recess
Implementation Method 2
supplying an oxygen-containing gas to the surface to oxidize the organic raw material gas adsorbed to the recess
Implementation Method 3
supplying a first gas containing a dehydrating agent to the surface
Data Source
AI summary
A deposition method includes: (a) preparing a substrate with a recess on a surface thereof; (b) supplying an organic raw material gas to the surface to adsorb the organic raw material gas to the recess; (c) supplying an oxygen-containing gas to the surface to oxidize the organic raw material gas adsorbed to the recess; and (d) after the (c), supplying a first gas containing a dehydrating agent to the surface.