Single-Crystal Silicon Layer Deposition at Lower Temperature
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Solution Overview
Problem
Current semiconductor processing chambers are expensive, complex, and have low throughput, limiting their ability to efficiently form single crystalline silicon and silicon-germanium layers with optimal substrate properties for 3D DRAM applications.
Innovation Solution
A method and system for forming single crystalline silicon and silicon-germanium layers by heating substrates to 800 degrees Celsius or less, maintaining a pressure between 1.0 Torr to 8.0 Torr, and reacting silicon-containing gases to deposit layers with controlled plasma activation and gas flow, using a cluster tool with integrated chambers for efficient processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional processing chambers are used to form single crystalline layers, then substrate properties can be achieved, but processing costs and device complexity increase
Solution Approach 1:
The patent applies parameter changes by operating at lower substrate temperatures (below 800°C) and moderate pressures (1.0-8.0 Torr) compared to conventional high-temperature processes. This parameter modification enables single crystalline layer formation using simpler equipment with reduced complexity while maintaining manufacturing precision
Solution Approach 2:
The invention replaces complex mechanical heating systems and high-temperature furnaces with a simplified processing chamber that uses moderate temperature control and chemical vapor deposition mechanisms, reducing device complexity while achieving the same crystalline quality
2Manufacturing precision
If conventional processing chambers are used to form single crystalline layers, then substrate properties can be achieved, but operation time increases
Solution Approach 1:
By changing the temperature parameter to operate below 800°C and using moderate pressure (1.0-8.0 Torr), the process achieves faster deposition rates while maintaining single crystalline quality, thereby reducing overall processing time compared to conventional slow high-temperature processes
3Manufacturing precision
If conventional processing chambers are used to form single crystalline layers, then substrate properties can be achieved, but throughput decreases
Solution Approach 1:
The modified parameter set (temperature below 800°C, pressure 1.0-8.0 Torr) enables faster deposition speeds and shorter processing cycles, directly increasing throughput and productivity while preserving the quality of single crystalline structures
Solution Approach 2:
The process uses preliminary plasma activation of the substrate surface before deposition, which prepares the surface in advance to promote single crystalline growth, enabling faster processing without compromising quality and thus improving overall throughput
4Manufacturing precision
If conventional processing chambers are used to form single crystalline layers, then substrate properties can be achieved, but processing costs increase
Solution Approach 1:
By operating at lower temperatures (below 800°C) and moderate pressures, the patent reduces energy consumption and extends equipment lifespan, thereby lowering processing costs while maintaining the ability to form high-quality single crystalline structures
Solution Approach 2:
The invention uses consumable precursor gases and moderate-pressure conditions that allow for simpler, less expensive chamber designs, reducing capital equipment costs and making the manufacturing process more economically viable
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 reduces costs, complexity, and operation time while enhancing modularity and throughput, achieving substrates with reduced surface roughness and abruptness, suitable for 3D DRAM applications.
Implementation Method 1
forming a plasma in the processing volume, and activating the exposed surface of the substrate using the plasma
Implementation Method 2
heating the substrate to a substrate temperature that is within a range of 545 degrees Celsius to 555 degree Celsius
Implementation Method 3
reacting the one or more silicon-containing gases to form one or more reactants, and depositing the one or more reactants onto an exposed surface of the substrate to form one or more silicon-containing layers
Data Source
AI summary
Embodiments of the present disclosure generally relate to methods, systems, and apparatus for forming layers having single crystalline structures. In one implementation, a method of processing substrates includes positioning a substrate in a processing volume of a chamber, and heating the substrate to a substrate temperature that is 800 degrees Celsius or less. The method includes maintaining the processing volume at a pressure within a range of 1.0 Torr to 8.0 Torr, and flowing one or more silicon-containing gases and one or more diluent gases into the processing volume. The method includes reacting the one or more silicon-containing gases to form one or more reactants, and depositing the one or more reactants onto an exposed surface of the substrate to form one or more silicon-containing layers on the exposed surface. The one or more silicon-containing layers each having a single crystalline structure.