Directional Plasma Treatment for Substrate Feature Density
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current photolithographic techniques have limitations in feature size reduction due to minimum pitch constraints, requiring additional processing steps like self-aligned double patterning (SADP) which increases costs and risks of misprocessing.
Innovation Solution
A plasma treatment process that selectively modifies substrate surfaces using directional delivery of energetic particle beams in a sub-atmospheric pressure environment, allowing for preferential removal or retention of treated regions during subsequent processing steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If photolithographic techniques are used to pattern features, then features can be formed on substrate, but minimum pitch constraints limit feature size reduction
Solution Approach 1:
The patent replaces photolithographic patterning (optical system) with direct particle beam writing (particle beam system). The particle beam system uses a focused beam of ions or electrons to directly deposit or remove material, eliminating the diffraction-limited resolution of optical systems. This substitution enables feature sizes below the photolithographic minimum pitch while reducing the number of processing steps required.
Solution Approach 2:
The patent changes the fundamental processing parameters by transitioning from optical wavelength-based patterning to particle beam energy-based patterning. By controlling particle beam energy, focus, and scanning parameters, the system achieves higher resolution and smaller minimum pitch features without requiring multiple lithography steps or complex patterning sequences.
2Manufacturing precision
If self-aligned double patterning (SADP) is used to extend photolithography capabilities, then pitch can be reduced, but the number of processing steps increases
Solution Approach 1:
The patent extracts and eliminates the intermediate patterning steps inherent in SADP by using direct particle beam writing. Instead of forming sacrificial mandrels, depositing spacers, and performing multiple etching steps, the particle beam system directly patterns the final features in a single step, removing the complexity of the multi-step SADP process while achieving the same pitch reduction.
Solution Approach 2:
The particle beam system performs preliminary material deposition or removal directly at the final feature locations, eliminating the need for subsequent spacer formation and pattern transfer steps. This preliminary action achieves the final pattern in one step rather than requiring the sequential operations of SADP.
3Quantity of substance
If multiple lithography steps are used to achieve high density features, then feature density increases, but processing cost and misprocessing risk increase
Solution Approach 1:
The patent replaces the complex sequence of multiple lithography and etching steps with a single particle beam writing step. This substitution maintains high feature density capability while dramatically reducing processing cost by eliminating redundant steps, reducing material consumption, and minimizing the risk of misprocessing that accumulates with each additional step.
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 reduces the number of lithographic steps needed, enhancing feature density and reducing processing costs while improving etch selectivity and minimizing misprocessing risks.
Implementation Method 1
A process of plasma modifying a surface of a substrate generally includes the directional delivery of various elemental species to an exposed surface of the substrate by use of an energetic particle beam
Implementation Method 2
the directional delivery of various elemental species to an exposed surface of the substrate by use of an energetic particle beam
Data Source
AI summary
Embodiments of the disclosure include apparatus and methods for modifying a surface of a substrate using a surface modification process. The process of modifying a surface of a substrate generally includes the alteration of a physical or chemical property and/or redistribution of a portion of an exposed material on the surface of the substrate by use of one or more energetic particle beams while the substrate is disposed within a particle beam modification apparatus. Embodiments of the disclosure also provide a surface modification process that includes one or more pre-modification processing steps and/or one or more post-modification processing steps that are all performed within one processing system.