Diffusion Controlled Oxidation Growth Parameters and Types
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Questions and Answers

Which type of oxidation process uses high-purity oxygen gas to oxidize silicon?

  • Steam oxidation
  • Rapid Thermal Process (RTP)
  • Wet oxidation
  • Dry oxidation (correct)
  • What is a characteristic of dry oxidation compared to wet oxidation?

  • Fast growth of oxide
  • Less quality oxide
  • Low breakdown voltage
  • Slow growth of oxide (correct)
  • In which oxidation process does the oxidizing element consist of one hydrogen atom and one oxygen molecule?

  • Wet oxidation (correct)
  • Rapid Thermal Process (RTP)
  • Dry oxidation
  • Steam oxidation
  • What does the wet oxidation process involve at high temperatures?

    <p>Steam</p> Signup and view all the answers

    Which type of oxidation process results in oxide layers of usually higher quality?

    <p>Dry oxidation</p> Signup and view all the answers

    What temperature range is used in the Rapid Thermal Process (RTP) for oxidizing silicon?

    <p>400-1300°C</p> Signup and view all the answers

    What is the purpose of the oxidation stage in semiconductor device manufacturing?

    <p>To generate a protective layer of silicon dioxide on the wafer's surface</p> Signup and view all the answers

    How are wafers cleaned before the oxidation process?

    <p>Via wet chemistry with a two-stage RCA clean</p> Signup and view all the answers

    What is the industry standard method for cleaning wafer surfaces?

    <p>Wet Chemistry - RCA Clean</p> Signup and view all the answers

    What does inspection failure for oxidized wafers refer to?

    <p>Overgrown oxide layers and uneven oxidation</p> Signup and view all the answers

    Which method is utilized primarily for creating a protective layer of silicon dioxide on a wafer's surface?

    <p>Dry Oxidation</p> Signup and view all the answers

    How are oxidized wafers inspected for various properties after the oxidation process?

    <p>Optical inspection for defects</p> Signup and view all the answers

    What is the purpose of using a mixture of hydrochloric acid, hydrogen peroxide, and deionized (DI) water in wafer cleaning?

    <p>To remove metals from the wafer surface</p> Signup and view all the answers

    During thermal oxidation of a silicon wafer, what is the temperature range typically used for growing a layer of silicon dioxide?

    <p>900°C to 1200°C</p> Signup and view all the answers

    Which process involves the reaction of oxygen gas with the silicon surface to produce a protective layer of silicon dioxide on the wafer?

    <p>Dry oxidation</p> Signup and view all the answers

    What method is commonly used for rinsing a silicon wafer after cleaning processes are completed?

    <p>Spray rinse</p> Signup and view all the answers

    Which tool is used for scrubbing the wafer surface with a brush or high pressure arm as part of the cleaning process?

    <p>Wafer Scrubber</p> Signup and view all the answers

    What mechanism is primarily used in wet oxidation for removing particles and organic materials during wafer cleaning?

    <p>Electric Repulsion</p> Signup and view all the answers

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