One-Piece RF Match Strap for Stable Chamber Lid Coupling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing multi-component RF coupling arrangement in SACVD processes experiences cyclical stress and impaired RF coupling due to the flexing of chamber lid straps, leading to reduced RF power transfer and potential arcing issues.
Innovation Solution
A one-piece RF match strap is introduced, which eliminates the connection between the fixed chamber lid strap and the RF match strap, providing structural rigidity and a continuous RF power transfer path from the RF match unit to the flexible chamber lid strap, ensuring constant contact and efficient RF power transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a multi-component RF coupling arrangement is used, then the system allows flexibility in assembly, but the flexing of chamber lid straps causes cyclical stress and impaired RF coupling
Solution Approach 1:
The patent combines multiple separate components (fixed chamber lid strap and RF match strap) into a single integrated one-piece RF match strap assembly. This eliminates the connection interface between components that causes cyclical stress during chamber lid flexing, thereby maintaining reliable RF coupling while preserving assembly flexibility through the unified design.
2Ease of manufacture
If separate fixed chamber lid strap and RF match strap are connected, then the system allows modular assembly, but the connection causes impaired RF power transfer
Solution Approach 1:
The invention merges the fixed chamber lid strap and RF match strap into a single continuous conductive structure. This eliminates the connection interface between separate components that causes impedance discontinuity and RF power loss, ensuring efficient RF power transfer from the RF match unit to the chamber while maintaining ease of manufacture through the integrated design.
3Reliability
If multiple connection points are used between RF match strap and chamber lid strap, then the system provides redundant connections, but the repeated opening and closing causes arcing issues
Solution Approach 1:
The patent integrates the RF match strap and chamber lid strap into a single one-piece structure, eliminating multiple connection points that would be subject to cyclical stress during chamber lid opening and closing. This unified design prevents contact separation and arcing at connection interfaces while maintaining reliable RF coupling throughout the operational cycle.
4Adaptability or versatility
If the RF match strap is flexible to accommodate chamber lid movement, then the system allows chamber operation, but the flexing causes cyclical stress and RF coupling impairment
Solution Approach 1:
The invention creates a unified one-piece RF match strap assembly that inherently accommodates chamber lid movement through its integrated design. The continuous conductive structure eliminates the need for separate flexible and rigid components, maintaining consistent RF coupling while allowing the necessary adaptability for chamber operation without cyclical stress at connection interfaces.
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 one-piece RF match strap maintains stable RF coupling, reducing RF power decay and reflected high power issues, thereby preventing product defects and arcing, even with repeated opening and closing of the process chamber lid.
Implementation Method 1
a one-piece RF match strap that has a head, a main body and a body extension. The main body of the one-piece RF match strap extends through the top electrically insulating column and the bottom electrically insulating column. A top of the one-piece RF match strap is configured to electrically contact an associated flexible chamber lid strap of the process chamber and a bottom of the one-piece RF match strap is configured to electrical connect with the RF match unit
Data Source
AI summary
A radio frequency (RF) match assembly for a chemical vapor deposition processing chamber. The assembly includes a top electrically insulating column and a bottom electrically insulating column. The assembly further includes a one-piece RF match strap that has a head, a main body and a body extension. The main body of the one-piece RF match strap is configured to extend through the top electrically insulating column and the bottom electrically insulating column. A flexible chamber lid strap connects the processing chamber to the top of the one-piece RF match strap.