Phenolic Stabilizers for Cyclic Alkene Process Stability
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Solution Overview
Problem
The semiconductor industry faces challenges in maintaining the stability and purity of cyclic alkene derivatives during chemical vapor deposition processes, leading to residue formation and equipment downtime due to the instability of silicon-containing compounds like 1,3,5,7-Tetramethylcyclotetrasiloxane (TMCTS) and 2,5-Norbornadiene (NBDE), which degrade and form oligomers, causing flow issues and film quality problems.
Innovation Solution
A stabilized cyclic alkene composition is developed by incorporating a stabilizer compound of Formula (I), such as phenolic compounds like 4-methoxyphenol, in concentrations greater than 200 ppm up to 20,000 ppm, which effectively reduces residue formation and enhances the stability of cyclic alkenes during both storage and dynamic process conditions, ensuring continuous operation of deposition tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cyclic alkenes are used without stabilizers, then the process is simpler and cost更低, but the compounds degrade and form oligomers causing residue formation and equipment downtime
Solution Approach 1:
A phenolic stabilizer compound is introduced as an intermediary substance to prevent the degradation of cyclic alkene. The stabilizer acts as a mediator between the cyclic alkene and oxygen/impurities, sacrificing itself to prevent oligomerization of the main compound, thereby maintaining reliability without significantly increasing complexity
Solution Approach 2:
The phenolic stabilizer is added in advance to the cyclic alkene composition before the chemical vapor deposition process. This preliminary action prevents degradation during storage and handling, ensuring the compound remains stable and ready for use without requiring complex real-time stabilization systems
2Object-generated harmful factors
If stabilizer concentration is increased, then residue formation is reduced, but the cost and complexity of the composition increases
Solution Approach 1:
The patent optimizes the stabilizer concentration parameter to a specific range (200-20,000 ppm) where the phenolic compound effectively prevents oligomerization and residue formation. This parameter optimization achieves maximum benefit with minimal stabilizer quantity, balancing effectiveness with cost and composition simplicity
3Productivity
If equipment is operated continuously without maintenance, then productivity increases, but degradation products accumulate causing flow issues and film quality problems
Solution Approach 1:
The phenolic stabilizer provides beforehand cushioning by preventing the formation of degradation products during extended equipment operation. This protective action cushions against the accumulation of oligomers that would otherwise cause flow issues and film quality problems, enabling continuous operation without frequent maintenance interruptions
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 use of high concentrations of phenolic stabilizers significantly reduces oligomerization and residue formation, extending the shelf life and process stability of cyclic alkenes, thereby improving the reliability and efficiency of semiconductor manufacturing by minimizing equipment downtime and maintaining film quality.
Implementation Method 1
stabilized cyclic alkene compositions... one or more stabilizer compounds... reduces residue formation upon evaporation
Implementation Method 2
chemical vapor deposition (CVD)... The silicon containing compound is then chemically or physically altered (i.e., reacted with another component, or subjected to application of an energy source such as radiation, heat (thermal CVD), or plasma (PECVD), etc.) to deposit a film on the substrate
Data Source
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AI summary
A stabilized cyclic alkene composition comprising one or more cyclic alkenes, and at least one stabilizer compound having the Formula (I), Formula (I) R1,R2,R3,R4,R5(C6)OH wherein R1 through R5 can each independently be H, OH, C1-C8 linear, branched, or cyclic alkyl, C1-C8 linear, branched, or cyclic alkoxy or substituted or unsubstituted aryl, and wherein the stabilizer compound is present in an amount greater than 200 ppm. A method for forming a layer of carbon-doped silicon oxide on a substrate, which uses the stabilized alkene composition and a silicon containing compound.