Hydrogenated Silane Composition Linear Cyclic Ratio Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Cyclic hydrogenated silane compositions used in semiconductor applications often suffer from reduced storage stability due to the presence of linear hydrogenated silane, which affects vaporization stability and film uniformity, necessitating control over the ratio of linear to cyclic silane.
Innovation Solution
A hydrogenated silane composition with a content ratio of linear silane having Si atoms of 5 or less to cyclic silane having Si atoms of 5 to 7 of 0.009 or less, primarily containing cyclohexasilane, is developed to enhance storage and vaporization stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If linear hydrogenated silane is contained in a large amount in the composition, then the vapor pressure is elevated due to hydrogen bonds, but the vaporization stability and storage stability of cyclic hydrogenated silane deteriorate
Solution Approach 1:
The patent applies parameter changes by strictly controlling the content ratio of linear hydrogenated silane to cyclic hydrogenated silane at 0.009 or less. This quantitative parameter control resolves the contradiction by limiting the amount of linear silane that causes vapor pressure elevation, thereby maintaining vaporization stability while allowing the presence of linear silane in the composition.
Solution Approach 2:
The patent converts the harmful effect of linear hydrogenated silane (elevating vapor pressure and reducing stability) into a beneficial situation by establishing a precise threshold (0.009 ratio). At this controlled level, the presence of linear silane is acceptable while its harmful effects are minimized, transforming a potential defect into a manageable composition parameter.
2Ease of manufacture
If linear hydrogenated silane is contained in a large amount, then the composition can be prepared more easily, but the storage stability of cyclic hydrogenated silane decreases
Solution Approach 1:
The patent resolves this contradiction through parameter control by setting the linear to cyclic silane content ratio at 0.009 or less. This quantitative specification balances ease of manufacture (allowing linear silane presence) with storage stability (limiting its harmful impact), providing a clear manufacturing target that satisfies both requirements.
3Speed
If linear hydrogenated silane with Si atoms of 5 or less is contained, then the vapor pressure increases due to high volatility, but the uniformity of thin films is impaired
Solution Approach 1:
The patent addresses this contradiction by controlling the content ratio of linear hydrogenated silane with 5 or fewer Si atoms to cyclic hydrogenated silane at 0.009 or less. This parameter control limits the amount of highly volatile linear silane that would otherwise cause vapor pressure fluctuations and film uniformity issues, while still permitting its presence in the composition.
Data Source
AI summary
At least one embodiment of the present disclosure provides a hydrogenated silane composition containing a cyclic hydrogenated silane having high storage stability.The at least one embodiment of the present disclosure relates to a hydrogenated silane composition, wherein a content ratio of a linear hydrogenated silane having Si atoms of 5 or less to a cyclic hydrogenated silane having Si atoms of 5 to 7 is 0.009 or less, wherein the cyclic hydrogenated silane comprises at least cyclohexasilane, and further comprises at least one cyclic hydrogenated silane having a branched silyl group selected from silylcyclopentasilane and silylcyclohexasilane, and wherein a content ratio of a total of the silylcyclopentasilane and the silylcyclohexasilane to the cyclic hydrogenated silane having Si atoms of 5 to 7 is 10 ppb or more on a mass basis.