Batch Curing Chamber with Zoned Heating for Uniform Dielectric Cure
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Solution Overview
Problem
The challenge in semiconductor fabrication is filling high aspect ratio gaps with dielectric material without encountering pinch-off, which leads to voids or weak spots in the structure. Current techniques for hardening and densifying flowable dielectric films are time-consuming.
Innovation Solution
A batch processing chamber is designed to simultaneously cure multiple substrates, featuring multiple sub-processing regions, a loading opening with a cover plate having slotted openings, and a system for independent temperature control of each sub-processing region. This setup allows for efficient curing of dielectric materials on substrates with high aspect ratio features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If flowable precursor materials are deposited to fill high aspect ratio gaps, then the gaps can be filled without voids or weak spots, but the subsequent hardening process becomes time-consuming
Solution Approach 1:
The batch processing chamber divides the processing space into multiple independently controllable zones (first and second sub-processing regions), each capable of handling substrates separately. This segmentation allows parallel processing of multiple substrates through different curing stages, significantly reducing total hardening time while maintaining quality.
Solution Approach 2:
The system performs preliminary heating in the first sub-processing region before substrates enter the second region for final curing. This staged approach prepares materials in advance, allowing continuous throughput and reducing overall process time while ensuring proper curing conditions are met.
2Productivity
If multiple substrates are processed simultaneously in a batch chamber, then productivity increases, but substrate-to-substrate variation in curing uniformity may worsen
Solution Approach 1:
Each sub-processing region is equipped with independent temperature control systems, allowing different zones to be optimized for specific curing requirements. The first region can be maintained at lower temperatures for preliminary heating while the second region provides higher temperatures for final curing, ensuring uniform results across all substrates processed simultaneously.
Solution Approach 2:
The system employs dynamic temperature control where each sub-processing region can independently adjust its temperature profile. Heating elements and gas delivery systems are controlled separately for each zone, enabling real-time optimization of curing conditions to maintain uniformity across multiple substrates throughout the batch processing cycle.
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 batch processing chamber effectively minimizes substrate-to-substrate variation in the curing process, allowing for the simultaneous curing of multiple substrates while maintaining uniformity and efficiency, thus overcoming the limitations of existing hardening and densifying processes.
Implementation Method 1
reduce the free area of the loading opening when the loading opening is open
Implementation Method 2
the hardening process includes a heat treatment to remove volatile components from the deposited material
Implementation Method 3
remove volatile components from the deposited material that are necessary to make the initially deposited film flowable
Data Source
AI summary
Embodiments of the present disclosure generally relate to a batch processing chamber that is adapted to simultaneously cure multiple substrates at one time. The batch processing chamber includes multiple processing sub-regions that are each independently temperature controlled. The batch processing chamber may include a first and a second sub-processing region that are each serviced by a substrate transport device external to the batch processing chamber. In addition, a slotted cover mounted on the loading opening of the batch curing chamber reduces the effect of ambient air entering the chamber during loading and unloading.