Opaque Side Blocks for Uniform Gas Activation in Processing Chambers
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Solution Overview
Problem
Existing semiconductor processing chambers face challenges in achieving uniform deposition of materials on substrates due to difficulties in adjusting gas flow rates and pressures, substrate rotation, and non-uniform activation of processing gases, which can lead to non-uniform processing and cleaning complications.
Innovation Solution
The introduction of a processing chamber with a flow guide block and a second flow guide block, each with opaque outer surfaces, to control gas flow and enhance deposition uniformity, combined with a method of using purge gases to prevent contamination and improve cleaning efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If gas flow rates and pressures are adjusted to improve deposition uniformity, then deposition uniformity is improved, but the complexity of controlling process parameters increases
Solution Approach 1:
Flow guide blocks are introduced as intermediary components between the gas inlet and the substrate. These blocks with specific geometries (flow channels, angles, shapes) act as mediators to shape and direct the gas flow, transforming the complex control problem into a structural solution that passively achieves uniform deposition without requiring complex real-time adjustment of flow rates and pressures
2Manufacturing precision
If substrate rotation is used to improve deposition uniformity, then deposition uniformity is improved, but the difficulty of adjusting process parameters increases
Solution Approach 1:
The flow guide blocks serve as static intermediaries that compensate for substrate rotation effects. By designing the gas flow path to account for rotational movement, the blocks create a flow pattern that maintains uniformity across the substrate surface even when rotation is applied, eliminating the need for complex coordination between rotation speed and process parameters
3Manufacturing precision
If high pressures and low flow rates are used to improve deposition uniformity, then deposition uniformity is improved, but the difficulty of cleaning components increases
Solution Approach 1:
The processing chamber is segmented into distinct functional zones with dedicated flow paths. The flow guide blocks create separate channels for deposition and cleaning operations, allowing high pressure/low flow rate conditions to be applied during deposition without compromising cleaning efficiency. This segmentation enables independent optimization of deposition and cleaning processes
4Productivity
If processing gases are activated to improve processing, then processing is improved, but the non-uniformity of gas activation causes non-uniform processing
Solution Approach 1:
The flow guide blocks are designed with locally varied geometries (different channel cross-sections, angles, and shapes) that create corresponding local variations in gas flow characteristics. This local quality differentiation ensures that gas activation occurs uniformly across different regions of the substrate by matching the flow patterns to the specific processing requirements of each zone
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 solution facilitates uniform deposition and cleaning processes by controlling gas flow and pressure, reducing the effects of substrate rotation, and enhancing the uniformity of material layers on substrates, while also improving the efficiency of cleaning operations.
Implementation Method 1
The first flow guide block and the second flow guide block respectively include one or more opaque outer surfaces
Implementation Method 2
one or more heat sources operable to heat the internal volume
Data Source
AI summary
Embodiments of the present invention relate to blocks for gas activation, related substrate processing chambers, process kits, and methods. In some embodiments, a processing chamber applicable for use in semiconductor manufacturing includes a chamber body at least partially defining an internal volume, one or more heat sources operable to heat the internal volume, and a substrate support disposed in the internal volume. The processing chamber further includes one or more inlet openings configured to direct a gas across a gas flow path over the substrate support and to one or more exhaust outlets and a process kit disposed in the internal volume. The process kit includes a first flow guide block and a second flow guide block disposed opposite the first flow guide block with respect to the gas flow path. The first flow guide block and the second flow guide block respectively include one or more opaque outer surfaces.