Substrate Processing for Si-Si Bond Control in Charge Trap Films
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Solution Overview
Problem
Current semiconductor manufacturing processes face challenges in improving charge trap characteristics due to limitations in controlling the amount of Si—Si—Si bonds in films formed on substrates.
Innovation Solution
A method involving the supply of a decomposable silicon-containing process gas to form a layer with Si—Si—Si bonds on a substrate, followed by the dissociation of these bonds using a reaction gas, allowing for precise control of the Si—Si bond amount and enhancing charge trap characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a decomposable process gas containing silicon is supplied to form a layer with Si—Si—Si bonds on the substrate, then charge trap characteristics are improved, but the manufacturing process complexity increases due to the additional dissociation step
Solution Approach 1:
The manufacturing process is segmented into two distinct steps: first forming a layer containing Si—Si—Si bonds using decomposable process gas, then dissociating these bonds using reaction gas. This segmentation allows precise control over bond formation and breakdown, enabling improved charge trap characteristics while maintaining manageable process complexity through systematic breakdown of the manufacturing steps.
Solution Approach 2:
The Si—Si—Si bonds are formed in advance as intermediates during the first step, which are then dissociated in the second step to achieve the desired charge trap characteristics. This preliminary formation of specific bonds followed by controlled dissociation allows for precise tuning of film properties without requiring direct synthesis of the final structure.
2Manufacturing precision
If the amount of Si—Si—Si bonds is precisely controlled to improve charge trap characteristics, then manufacturing precision is improved, but the process time increases due to sequential gas supply steps
Solution Approach 1:
The process employs periodic action by sequentially supplying different process gases in distinct time intervals. First, decomposable process gas is supplied to form Si—Si—Si bonds, then reaction gas is supplied to dissociate these bonds. This periodic gas supply pattern enables precise control over bond amounts and charge trap characteristics while optimizing process time through structured temporal sequencing of chemical reactions.
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 approach effectively improves charge trap characteristics by regulating the Si—Si bond amount, thereby enhancing the performance of semiconductor devices.
Implementation Method 1
supplying a decomposable process gas containing silicon to the substrate to form a layer containing a Si—Si—Si bond on the substrate
Implementation Method 2
supplying a reaction gas to the substrate to dissociate the Si—Si—Si bond
Data Source
AI summary
There is provided a technique that includes: (a) supplying a decomposable process gas containing silicon to the substrate to form a layer containing a Si—Si—Si bond on the substrate; and (b) supplying a reaction gas to the substrate to dissociate the Si—Si—Si bond.