Integrated Heat and Actinic Radiation Array for Planarization Throughput
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Solution Overview
Problem
Existing ink-jet Adaptive Planarization (IAP) processes face challenges in heating polymerizable compositions during exposure while maintaining acceptable throughput as microelectronic components shrink, requiring a system that allows for simultaneous heating and actinic radiation without separate stations.
Innovation Solution
A system incorporating an array of heat sources and actinic radiation sources that emit at different peak wavelengths, allowing flexible timing and operation of heating and exposure operations, with heat sources and radiation sources that can be activated independently or simultaneously, and including thermal isolation and cooling mechanisms to maintain temperature control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If separate stations are used for heating and exposure operations, then temperature control is improved, but system complexity and throughput are worsened
Solution Approach 1:
The patent combines heating sources and actinic radiation sources into a single integrated station, allowing both functions to be performed simultaneously on the polymerizable composition. This merging eliminates the need for separate heating and exposure stations, reducing system complexity while maintaining temperature control through coordinated operation of both sources within the same chamber.
Solution Approach 2:
The integrated station serves multiple functions: it can heat the polymerizable composition using heating sources, expose it using actinic radiation sources, or perform both operations simultaneously. This multi-functionality allows a single station to replace what would traditionally require separate specialized stations, improving throughput while maintaining the temperature control benefits of dedicated heating capability.
2Temperature
If separate stations are used for heating and exposure operations, then temperature control is improved, but productivity is worsened
Solution Approach 1:
The integrated station enables continuous processing by allowing heating and exposure operations to occur simultaneously without requiring the substrate to be transferred between separate stations. The polymerizable composition receives both thermal energy and actinic radiation in a single continuous operation, eliminating idle transfer time and improving overall throughput while maintaining the temperature control necessary for proper curing.
3Productivity
If heat sources and actinic radiation sources operate simultaneously, then throughput is improved, but temperature control difficulty increases
Solution Approach 1:
The system incorporates temperature sensors that continuously monitor the temperature of the polymerizable composition during simultaneous heating and exposure operations. This feedback is used by the control system to adjust the power output of the heating sources in real-time, ensuring that the temperature remains within the desired range even while both heating and actinic radiation sources are operating simultaneously, thus maintaining temperature control while achieving improved throughput.
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
Enables efficient formation of photocured planarization layers with improved throughput by allowing simultaneous heating and exposure, reducing the need for separate stations and maintaining temperature control, thus enhancing the IAP process.
Implementation Method 1
an array of heat sources adapted to emit heat at a peak heating wavelength and heat a stack including a superstrate, a substrate, and a polymerizable composition
Implementation Method 2
at least one actinic radiation source adapted to emit actinic radiation at a peak actinic radiation wavelength and at least photocure the polymerizable composition
Implementation Method 3
a first thermal isolation member disposed between the stage and the at least one heat source
Data Source
AI summary
A system can include an array of at least one heat source adapted to heat a stack including a superstrate, a substrate, and a polymerizable composition between the superstrate and the substrate, and at least one actinic radiation source adapted to at least photocure the polymerizable composition to form a photocured planarization layer. Implementations of the system can allow more flexibility regarding heating and exposure operations and may allow a system to occupy less area. Separate stations for heating a pre-cured layer of a polymerizable composition and exposing the pre-cured layer is not required. The array of actinic radiation sources and heat sources allow greater flexibility with respect to timing for heating and exposing to actinic radiation the pre-cured layer. The system can be used in a method that forms a photocurable planarization layer from a pre-cured layer of a polymerizable composition.