Metrology of DNA arrays by super-resolution microscopy

Area of Science:

• Nanotechnology
• Biophysics
• Materials Science

Background:

• DNA self-assembly offers potential for nanoscale patterning in semiconductor manufacturing.
• Super-resolution microscopy is advancing for DNA imaging and inline metrology.
• Existing methods lack precise characterization of DNA array quality.

Purpose of the Study:

• To introduce crystal-PAINT as a novel metrology approach for DNA arrays.
• To demonstrate optical imaging and characterization of DNA nanostructures.
• To enable defect detection and quantitative analysis of DNA self-assembled arrays.

Main Methods:

• Combining DNA tile assembly with state-dependent super-resolution microscopy (crystal-PAINT).
• Optical imaging and characterization of DNA arrays.
• Analysis of crystal-PAINT images for array properties and defect identification.

Main Results:

• Demonstrated optical imaging and characterization of DNA arrays using crystal-PAINT.
• Revealed grain boundaries and temperature-dependent array quality.
• Provided quantitative information on finite DNA array properties, enabling defect detection and classification.

Conclusions:

• Crystal-PAINT is a powerful metrology tool for DNA nanostructures.
• This approach facilitates statistical analysis and quality control of self-assembled DNA arrays.
• Enables advancements in DNA-based lithography for semiconductor device patterning.