Maskless Photolithography and Non-Contact Printing

The video tutorial from the Southwest Center for Microsystems Education covers three main processes used in the fabrication of DNA microarrays: inkjet printing, photolithography, and maskless photolithography. Each method is explained in detail, highlighting the technology and steps involved in creating DNA microarrays. The tutorial also emphasizes the applications and significance of DNA microarrays in testing thousands of genes simultaneously.

What is a DNA microarray primarily used for?

• Testing a single gene

• Testing carbohydrates

• Testing thousands of different genes simultaneously

• Testing proteins

Which technology is used in the non-contact printing process for DNA microarrays?

• Laser printing

• 3D printing

• Screen printing

• Inkjet printing

In the non-contact printing process, what is the role of the piezoelectric crystal?

• To heat the ink

• To energize and de-energize ink flow

• To cool the ink

• To change the ink color

What is the substrate typically used in the photolithography process for DNA microarrays?

• Metal

• Plastic

• Glass

• Silicon

How are specific features exposed in the photolithography process?

• Using heat

• Using a laser

• Using a pattern mask and UV light

• Using a chemical reaction

What replaces the masks in the maskless photolithography process?

• Mechanical arms

• Chemical etching

• Digital mirror devices

• Laser beams

In the maskless process, what is the function of the digital mirror devices?

• To cool the substrate

• To heat the substrate

• To reflect light onto specific features

• To project images

What is a common step in both photolithography processes?

• Using a laser to cut the substrate

• Using a blocking agent to protect the surface

• Using a chemical to dissolve the substrate

• Using heat to bond nucleotides

Which process uses a digital mirror device instead of masks?

• Non-contact printing

• Traditional photolithography

• Chemical etching

• Maskless photolithography

What is the main advantage of using a maskless system over a traditional mask system?

• It eliminates the need for multiple masks

• It is faster

• It is cheaper

• It uses less energy