Multi-Zone Injector Block for Uniform CVD Gas Distribution

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing chemical vapor deposition (CVD) processes face challenges in predictability of reactant gas distribution across growth surfaces and efficiency, leading to significant amounts of unused reactant gases being vented, which increases production costs.

Innovation Solution

The implementation of a gas distribution device with partitioned reactant gas outlets into zones, such as a first and second zone, to improve predictability and efficiency by optimizing the distribution of reactant gases within the CVD reactor.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If reactant gases are introduced into the chamber from a gas distribution device, then the deposition process can be carried out, but the distribution uniformity of reactant gases across the growth surface is poor and a significant amount of unused reactant gases are vented

Engineering Contradiction:

Improvedeposition uniformityVSAvoidunused reactant gases vented

Core Design Contradiction:

Manufacturing precisionVSLoss of substance

Solution Approach 1:

The gas distribution device is divided into multiple zones (first zone and second zone) with different outlet configurations. The first zone has outlets oriented at a first angle relative to the wafer surface, while the second zone has outlets oriented at a second angle. This segmentation allows different regions of the chamber to receive reactant gases at optimized angles for their specific locations, improving distribution uniformity across the entire growth surface while reducing waste.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different zones of the gas distribution device are designed with locally optimized outlet angles tailored to their specific spatial relationships with the wafer. The first zone outlets are oriented at a first angle appropriate for its location, while the second zone outlets are oriented at a second angle appropriate for its location. This local optimization ensures that reactant gases are distributed uniformly across different regions of the growth surface, improving deposition uniformity while minimizing unused gas venting.

Inventive Principle:

Principle #3Local quality

2Reliability

If a single gas distribution device is used, then the device complexity is low, but the predictability of reactant gas distribution across growth surfaces is poor

Engineering Contradiction:

Improvepredictability of reactant gas distributionVSAvoidgas distribution device structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The gas distribution device is segmented into multiple zones with distinct outlet orientations. The first zone contains outlets oriented at a first angle, and the second zone contains outlets oriented at a second angle. This segmentation improves the predictability of reactant gas distribution by ensuring that each zone delivers gases at the optimal angle for its location, while the overall device remains a single integrated component with manageable complexity.

Inventive Principle:

Principle #1Segmentation

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 enhances reactant gas distribution uniformity, reduces waste, and lowers operational costs by minimizing the amount of unused gases vented from the process chamber.

Implementation Method 1

The injector block can include a plurality of first reactant gas distribution channels between one or more first reactant gas inlets and a plurality of first reactant gas distribution outlets to deliver a first reactant gas into the reactor

Methodology Applied

Scientific EffectGas distribution through channels:

Implementation Method 2

In MOCVD, reactant gases are introduced into a sealed reactor chamber within a controlled environment that enables the reactor gas to be deposited on a substrate (commonly referred to as a wafer) to grow thin epitaxial layers

Methodology Applied

Scientific EffectChemical vapor deposition: Chemical Vapour Deposition

Implementation Method 3

The heated stage can be configured to heat a wafer placed thereon to a process temperature

Methodology Applied

Scientific EffectThermal heating: Heating

Data Source

PatentUS12584223B2Chemical vapor deposition apparatus with multi-zone injection block

Publication Date: 2026.03.24 VEECO INSTRUMENTS INC

AI summary

An injector block for supplying one or more reactant gases into a chemical vapor deposition reactor. The injector block including a plurality of first reactant gas distribution channels between one or more first reactant gas inlets and a plurality of first reactant gas distribution outlets to deliver a first reactant gas into the reactor, and a plurality of second reactant gas distribution channels between one or more second reactant gas inlets and a plurality of second reactant gas distribution outlets to deliver a second reactant gas into the reactor, the plurality of second reactant gas distribution outlets partitioned into at least a second reactant gas first zone and a second reactant gas second zone, the second reactant gas second zone at least partially surrounding the second reactant gas first zone.