Flexible Chamber Seal Element for Misalignment Compensation

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Solution Overview

Problem

Substrate processing chambers experience misalignment issues between the substrate support and the showerhead, leading to uneven processing and compromised seals, which result in gas leakage and contamination.

Innovation Solution

Incorporation of flexible elements in the substrate processing chamber that allow for adjustment of the seal plate position relative to other chamber components, ensuring a secure seal despite misalignment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a rigid seal plate is used to form a seal with chamber components, then the seal integrity is improved, but the misalignment between the substrate support and showerhead causes the seal to be compromised

Engineering Contradiction:

Improveseal integrityVSAvoidalignment precision

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The seal plate is designed with flexible segments that can dynamically adjust their position and orientation to accommodate misalignment between the substrate support and showerhead. This dynamic capability allows the seal plate to maintain reliable sealing contact despite manufacturing or positioning variations, resolving the contradiction between seal integrity and alignment precision.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The seal plate incorporates flexible segments with varying degrees of compliance in different directions. By changing the physical parameters of the seal plate (flexibility, stiffness, conformability), it can adapt to misalignment conditions while maintaining effective sealing, thus resolving the contradiction between reliable sealing and alignment precision.

Inventive Principle:

Principle #35Parameter changes

2Ease of operation

If the substrate support is moved vertically between lowered and raised positions, then the ease of operation is improved, but misalignment occurs between the substrate and showerhead during processing

Engineering Contradiction:

Improvesubstrate transfer capabilityVSAvoidsubstrate-showerhead alignment

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The flexible seal plate segments can dynamically adjust during the vertical movement cycle to compensate for misalignment that occurs during substrate transfer and positioning. This maintains both the ease of operation for substrate handling and the alignment precision needed for uniform processing.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The flexible seal plate has self-adjusting capability through its segmented flexible structure, automatically compensating for misalignment without requiring external intervention or complex control systems. This maintains alignment precision while preserving the simplicity of vertical substrate support movement.

Inventive Principle:

Principle #25Self-service

3Productivity

If processing is performed with misalignment between seal plate and chamber components, then the productivity is maintained, but gas leakage and contamination occur

Engineering Contradiction:

Improveprocessing throughputVSAvoidgas leakage and contamination

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The flexible seal plate segments can dynamically adapt during processing to maintain gas-tight sealing even when misalignment occurs, allowing continuous productivity without compromising the processing environment. This resolves the contradiction between maintaining productivity and preventing gas leakage.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

By changing the physical state and flexibility parameters of the seal plate, it can conform to misaligned surfaces and maintain effective sealing, preventing gas leakage and contamination while allowing processing to continue at normal productivity levels.

Inventive Principle:

Principle #35Parameter changes

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 flexible elements maintain a seal between the seal plate and chamber components, preventing gas leakage and contamination, thereby ensuring consistent and high-quality substrate processing.

Implementation Method 1

The intermediate portion is impermeable, and is configured to flex to allow adjustment of a position of the first portion relative to the second portion

Methodology Applied

Scientific EffectFlexibility: Elasticity

Data Source

PatentUS20260062809A1Flexible element for a substrate processing chamber

Publication Date: 2026.03.05 APPLIED MATERIALS INC

AI summary

A flexible element is configured to form a seal between a seal plate and another component in a substrate processing chamber. The flexible element includes a first portion engaged with a first interface surface of the seal plate, and a second portion facing a second interface surface of the component in the processing chamber. An intermediate portion spans from the first portion to the second portion. The intermediate portion is configured to flex to accommodate a misalignment between the first interface surface and the second interface surface by allowing relative movement between the first and second portions.