Segmented Showerhead for Multi-Temperature Precursor Delivery
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Solution Overview
Problem
In organic vapor deposition processes, co-depositing cooler and warmer materials can lead to dissociation and condensation issues due to purity and contamination concerns, particularly when using a carrier gas, and existing technologies struggle to manage thermal cross-talk and pressure drops in multi-material deposition.
Innovation Solution
A showerhead assembly with fluidly isolated gas delivery portions, each with a wedge-shaped body and plenum, allows for simultaneous heating of multiple materials to different temperatures, preventing thermal cross-talk and ensuring uniform deposition on a substrate, while maintaining thermal isolation and reducing pressure drops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple materials are co-deposited using a conventional showerhead, then deposition efficiency is improved, but thermal cross-talk causes dissociation and condensation issues
Solution Approach 1:
The showerhead is divided into multiple independently controlled gas delivery portions, each capable of delivering a different material at a different temperature. This segmentation prevents thermal cross-talk between materials while maintaining the ability to deposit multiple materials simultaneously, thus resolving the contradiction between deposition efficiency and material stability.
2Manufacturing precision
If different temperatures are applied to different gas delivery portions, then material-specific deposition conditions are achieved, but pressure drops increase
Solution Approach 1:
By segmenting the showerhead into separate gas delivery portions with independent temperature control, the system can apply different temperatures to different materials without causing thermal cross-talk. This segmentation allows precise control of deposition conditions for each material while managing pressure drops through independent flow control for each segment.
3Ease of operation
If carrier gas is used in organic vapor deposition, then deposition process is simplified, but purity and contamination concerns arise
Solution Approach 1:
The showerhead is segmented into separate gas delivery portions for different materials, eliminating the need for a carrier gas that would cause contamination. Each material can be delivered independently through its own segment, maintaining process simplicity while ensuring material purity and preventing contamination.
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 solution enables the efficient and contamination-free co-deposition of multiple materials at varying temperatures, preventing unwanted reactions and condensation, thereby improving the purity and uniformity of deposited films in semiconductor and optical device manufacturing.
Implementation Method 1
heating a first gas delivery portion to a first temperature; and simultaneously heating a second gas delivery portion to a second temperature different than the first temperature
Data Source
AI summary
Methods of introducing precursors through a segmented showerhead are provided herein. In some embodiments, a method of introducing precursors through a segmented showerhead having a plurality of gas delivery portions that are fluidly isolated includes heating a first gas delivery portion to a first temperature; and simultaneously heating a second gas delivery portion to a second temperature different than the first temperature, wherein each of the first and second gas delivery portions (i) have a wedge shaped body that defines a plenum, (ii) are coplanar, and (iii) together form a showerhead having a circular shape.