Planarizing Film Formation Using Electromagnetic Heating
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Solution Overview
Problem
Current film forming techniques face challenges in achieving precise planarization of substrates with narrow depth of focus, particularly in photolithography for semiconductor devices, where the existing methods lack effective heating mechanisms for the planarizing layer during contact with a flat surface.
Innovation Solution
A film forming apparatus that includes a driver for contact and separation, a heater using electromagnetic waves to reduce viscosity and conform the curable composition to a flat surface, and a curing device for ultraviolet curing, allowing for efficient planarization of substrates with improved three-dimensional accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the contact time between the flat surface and planarizing layer is increased to improve planarization, then surface flatness is enhanced, but the process time and productivity are reduced
Solution Approach 1:
The patent changes the temperature parameter during the contact process to reduce material viscosity, which accelerates the planarization kinetics. This allows sufficient planarization to be achieved in shorter contact times, thereby maintaining surface flatness while improving productivity and process efficiency
Solution Approach 2:
The patent employs periodic action through controlled heating cycles and contact/separation movements. The planarizing layer is heated to optimal temperature, contacted with the substrate for a controlled duration, then separated and cured. This periodic process optimizes the balance between planarization quality and processing speed
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 enables the formation of a planarized film with enhanced three-dimensional accuracy, suitable for high-resolution photolithography, by heating the curable composition to reduce viscosity and promote planarization, ensuring the film conforms to the substrate's surface profile, thereby addressing the limitations of existing techniques.
Implementation Method 1
a heater that heats the curable composition arranged on the substrate with electromagnetic waves
Implementation Method 2
a curing device that forms a film made of a cured product of the curable composition by curing the curable composition
Data Source
Figure 1
Figure 2A~2C
Figure 3A~3C
AI summary
A film forming apparatus for forming a film on a substrate includes a driver configured to bring a curable composition arranged on the substrate and a flat surface into contact with each other, a heater configured to heat the curable composition by electromagnetic waves to reduce the viscosity of the curable composition and make the curable composition conform to the flat surface, and a curing device configured to form a film made of a cured product of the curable composition by curing the curable composition in a state in which the curable composition conforms to the flat surface.