Planarization Curing Layout Without UV Transmission Through the Chuck
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Solution Overview
Problem
Existing planarization systems face non-uniform UV light transmission issues due to geometric features in the superstrate chuck, leading to unsatisfactory curing performance in semiconductor fabrication.
Innovation Solution
A method and system where a light source is positioned between the superstrate chuck and the multilayer structure, allowing direct exposure of the formable material film to UV light, avoiding transmission through the superstrate chuck and thus ensuring uniform curing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UV light is transmitted through the transparent superstrate chuck for curing, then the curing process can be performed, but non-uniform transmission of UV light occurs due to geometric features (recesses, lands, channels) causing unsatisfactory curing performance
Solution Approach 1:
The patent extracts the light source from the traditional configuration where UV light passes through the superstrate chuck. Instead, the light source is positioned between the superstrate chuck and the multilayer structure, allowing direct exposure of the formable material film to UV light without transmission through the chuck's geometric features, thereby eliminating non-uniform transmission
Solution Approach 2:
The patent introduces a positioning system as an intermediary mechanism that precisely positions the light source in the space between the superstrate chuck and the multilayer structure. This intermediary positioning system enables optimal light exposure geometry without the light path being obstructed or distorted by the superstrate chuck's geometric features
2Manufacturing precision
If the light source is positioned between the superstrate chuck and the multilayer structure, then uniform curing is achieved, but additional positioning systems and space requirements are needed
Solution Approach 1:
The positioning system is designed to perform multiple functions: it positions the superstrate during planarization and also positions the light source for curing. This multi-functional approach reduces overall system complexity despite adding the light source positioning capability
Solution Approach 2:
The patent utilizes the vertical dimension (space between superstrate chuck and multilayer structure) to position the light source, rather than trying to position it laterally. This dimensional approach simplifies the positioning mechanism by using vertical spacing already present in the planarization system
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
This approach ensures uniform curing of the formable material, improving the planarization process by eliminating non-uniformity and enhancing the quality of semiconductor substrates.
Implementation Method 1
providing a space between the superstrate chuck and the multilayer structure after the releasing, positioning a light source into the provided space between the superstrate chuck and the multilayer structure, and curing the film of the multilayer structure by exposing the film to light emitted from the light source
Implementation Method 2
A planarization technique sometimes referred to as inkjet-based adaptive planarization (IAP) involves dispensing a variable drop pattern of polymerizable material between the substrate and a superstrate
Data Source
AI summary
A method of planarizing a substrate comprises dispensing formable material onto a substrate, contacting a superstrate held by a superstrate chuck with the formable material on the substrate, thereby forming a multilayer structure including the superstrate, a film of the formable material, and the substrate, releasing the multilayer structure from the superstrate chuck, providing a space between the superstrate chuck and the multilayer structure after the releasing, positioning a light source into the provided space between the superstrate chuck and the multilayer structure, and curing the film of the multilayer structure by exposing the film to light emitted from the light source.