VLSI Technology: Optical Proximity Correction
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Questions and Answers

What is the primary function of the H+ ions in the photo acid generator exposure generation process?

  • To create standing waves in the photoresist
  • To act as a catalyst for chemical amplification (correct)
  • To absorb energy in the resist layer
  • To solubilize the resin in the base

What is the purpose of using strategies to reduce reflection in the context of lithography?

  • To absorb energy in the resist layer
  • To improve the efficiency of the photo acid generator exposure
  • To prevent destructive interference of light waves (correct)
  • To create standing waves in the photoresist

What is the term for the points of maximum displacement in a standing wave pattern?

  • Wavelengths
  • Reflection points
  • Nodes
  • Antinodes (correct)

In the context of VLSI technology, what is the primary role of the protection group R?

<p>To make the resin insoluble in base (B)</p> Signup and view all the answers

What is the wavelength of the i-line used in lithography, according to Marc Heyns?

<p>248nm (B)</p> Signup and view all the answers

What is the term for the repeated interference of two waves of identical frequency moving in opposite directions along the same medium?

<p>Standing waves (B)</p> Signup and view all the answers

What is the primary advantage of using chemical amplification in the photo acid generator exposure generation process?

<p>Enhanced sensitivity of the photoresist (C)</p> Signup and view all the answers

What is the term for the points of no displacement in a standing wave pattern?

<p>Nodes (B)</p> Signup and view all the answers

What is the role of the post-exposure bake (PEB) in the photo acid generator exposure generation process?

<p>To initiate the chemical amplification reaction (D)</p> Signup and view all the answers

What is the total thickness of the standing wave pattern in the photoresist, according to the formula?

<p>λ/4n (A)</p> Signup and view all the answers

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