Integrated Substrate Treatment Apparatus for Dust-Free PZT Film Formation
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Solution Overview
Problem
Conventional methods for manufacturing PZT films face issues with dust and contaminant adherence during spin-coating and conveyance, limiting productivity, especially when forming thick films, as they require repeated processes and manual handling which can lead to errors and reduced efficiency.
Innovation Solution
A substrate treatment apparatus with integrated spin-coating, annealing, and conveying chambers, equipped with air-conditioning mechanisms to regulate dust and temperature, and an exhaust system to prevent contamination, along with a method that includes sequential steps of spin-coating, temporary calcination, and lamp annealing to form thick films efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual conveyance is used between spin coater and annealing apparatus, then flexibility in operation is maintained, but productivity is limited and dust contamination occurs
Solution Approach 1:
The patent combines multiple treatment chambers (spin-coating chamber, drying chamber, calcination chamber, annealing chamber) and conveyance functions into a single integrated apparatus. The substrate is conveyed automatically through connected chambers without external handling, eliminating dust contamination from manual operations while improving productivity through continuous processing.
Solution Approach 2:
The patent creates a controlled atmosphere environment within the integrated apparatus, maintaining dust-free conditions throughout the substrate treatment process. The sealed chamber system prevents external dust contamination while the automated conveyance mechanism operates within this protected environment.
2Manufacturing precision
If repeated spin-coating and calcination processes are performed to form thick films, then desired film thickness is achieved, but processing time increases and productivity decreases
Solution Approach 1:
The patent implements continuous processing by integrating spin-coating, drying, calcination, and annealing chambers in sequence. The substrate moves continuously through each treatment stage without removal or manual handling, enabling thick film formation through multiple layers to be deposited and processed in an uninterrupted workflow, thereby improving productivity while maintaining precise thickness control.
3Productivity
If integrated automated processing is implemented, then productivity is improved and dust contamination is reduced, but device complexity increases
Solution Approach 1:
The patent divides the integrated apparatus into distinct functional chambers (spin-coating chamber, drying chamber, calcination chamber, annealing chamber), each performing a specific treatment step. This segmentation allows independent optimization of each process stage while maintaining automated continuous operation, balancing the benefits of integration with manageable system complexity.
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 apparatus effectively suppresses dust adherence and enhances productivity by automating the film formation process, resulting in high-quality PZT thick films with improved hysteresis characteristics and reduced leak current densities compared to conventional methods.
Implementation Method 1
a spin-coating treatment chamber for coating a film on a substrate by spin-coating
Implementation Method 2
the amorphous PZT after having been temporarily calcined is subjected to annealing treatment by using a pressurized lamp annealing apparatus (RTA: rapidly thermal anneal) to perform PZT crystallization
Data Source
AI summary
To provide a substrate treatment apparatus capable of suppressing adherence of dust to a film coated on a substrate. As an aspect of the present invention is a substrate treatment apparatus provided with a spin-coating treatment chamber 4a for coating a film on the substrate by spin-coating, a first air-conditioning mechanism that regulates an amount of dust in the air in the spin-coating treatment chamber, an annealing treatment chamber 7a for performing lamp annealing treatment on the film coated on the substrate, a conveying chamber 2a that is connected to each of the spin-coating treatment chamber and the annealing treatment chamber and is for conveying the substrate between the spin-coating treatment chamber and the annealing treatment chamber each other, and a second air-conditioning mechanism that regulate an amount of dust in the air in the conveying chamber.