Multi-Channel Chuck Assembly for Uniform Planarization Separation
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Solution Overview
Problem
Current planarization methods face challenges in controlling superstrate curvature and separation from cured films, particularly when the superstrate is similar in size to the substrate, leading to non-uniform planarization and potential defects.
Innovation Solution
A chuck assembly with a plate holding member and rigid member, featuring channels and fluid conduits, is used to control superstrate curvature and facilitate consistent separation by applying vacuum and pressure to the superstrate, ensuring uniform planarization and minimizing defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single-channel chuck assembly is used to hold the plate, then the structure is simple, but the control of superstrate curvature and separation is insufficient leading to non-uniform planarization
Solution Approach 1:
The chuck assembly is divided into multiple independent channels (first channel, second channel, third channel) that can be controlled separately. Each channel has its own fluid conduit allowing independent vacuum/pressure application to different regions of the plate, enabling precise control of superstrate curvature and separation front propagation throughout the planarization process.
2Area of stationary object
If the superstrate is similar in size to the substrate, then the coverage is maximized, but the separation from cured film becomes difficult and non-uniform
Solution Approach 1:
Different regions of the plate are subjected to different vacuum/pressure conditions through the multi-channel system. The first channel applies vacuum to the central region while the second and third channels apply vacuum to peripheral regions, creating localized control zones that enable uniform separation across the entire large-area superstrate from the cured film.
3Ease of operation
If vacuum and pressure are applied uniformly across the plate, then the control is simple, but the superstrate curvature and separation front propagation cannot be controlled consistently
Solution Approach 1:
The chuck assembly enables dynamic control of vacuum and pressure conditions in different regions of the plate. By independently adjusting the vacuum/pressure in each channel, the system can adaptively control superstrate curvature during formable material spreading and adjust separation front propagation during the separation phase, providing consistent control throughout the process.
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 solution provides improved control over superstrate curvature and separation, resulting in uniform planarization and reduced non-fill defects, enhancing the quality of semiconductor fabrication processes.
Implementation Method 1
a first vacuum pressure applied to a first channel to hold a superstrate to the plate holding member, a second vacuum pressure applied to a second channel, and a third vacuum pressure applied to a third channel
Implementation Method 2
a first positive pressure applied to a first channel to separate the superstrate from the cured formable material
Data Source
AI summary
A chuck assembly for holding a plate comprises a plate holding member configured to hold the plate, the plate holding member including a central opening, a rigid member configured to hold the plate holding member, a first channel formed by the plate holding member, a second channel formed by the rigid member, a first fluid conduit in communication with the second channel, and, a second fluid conduit at least partially disposed within the second channel and in communication with the first channel.