Fluid Dispenser Drop Patterns for Substrate Planarization
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Solution Overview
Problem
Existing nano-fabrication techniques face challenges in achieving larger production yields with increased circuits per unit area while maintaining process control and reducing feature dimensions, and planarization techniques struggle to address substrate height variations, affecting the ability to add further layers and impacting critical dimensions and depth of focus in lithographic processes.
Innovation Solution
The method involves specifying nozzle or fluid-dispense port groups for fluid dispensers, determining combined coverage heights and ranges, and selecting scanning patterns based on these groups and ranges to optimize drop placement, using shift values and pass combinations to ensure comprehensive coverage and minimize defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional planarization techniques are used to address substrate height variations, then substrate flatness is improved, but manufacturing complexity and process time increase
Solution Approach 1:
The patent replaces mechanical planarization methods with a fluid dispensing system that deposits material in controlled drop patterns. This substitution eliminates complex mechanical planarization equipment while achieving the same substrate flatness improvement through precise fluid placement and curing
Solution Approach 2:
The patent changes the approach from mechanical removal to material addition by controlling drop size, spacing, and distribution parameters. By adjusting these fluid dispensing parameters, the system achieves planarization with simpler equipment while maintaining manufacturing precision
2Ease of manufacture
If substrate height variations are not addressed, then process simplicity is maintained, but critical dimension control and depth of focus deteriorate
Solution Approach 1:
The patent applies preliminary planarization treatment before subsequent lithographic processes. By pre-flattening the substrate surface through controlled fluid dispensing and curing, the system ensures optimal critical dimension control and depth of focus in later steps without adding complexity to those subsequent processes
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 enhances the ability to planarize substrates, improving critical dimension control, feature placement, and depth of focus, thereby enabling more efficient fabrication of integrated circuits and meta optical elements with reduced feature dimensions.
Implementation Method 1
specifying nozzles of a fluid dispenser that are usable to eject fluid
Implementation Method 2
the material is polymerized on the substrate
Data Source
AI summary
Some devices, systems, and methods specify nozzles of a fluid dispenser that are usable to eject fluid and nozzles of the fluid dispenser that are not usable to eject fluid; specify contiguous nozzle groups of the nozzles that are usable to eject fluid; specify a coverage height of a largest contiguous nozzle group of the contiguous nozzle groups; determine, for one or more pass combinations, a respective combined coverage height, wherein each pass combination respectively includes two or more passes, of the fluid dispenser, that are shifted relative to each other by a shift value; and select, as a selected basis of a scanning pattern, the largest contiguous nozzle group or, alternatively, one of the one or more pass combinations based on the coverage height of the largest contiguous nozzle group and on the respective combined coverage height of each of the one or more pass combinations.