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Microelectronics Materials and Devices

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  1. Introduction
    3 Topics
  2. Crystal Structure
    17 Topics
  3. Energy Bands
  4. Dielectrics and Other Non-semiconductor Materials
  5. Semiconductors
  6. P-N Junctions
  7. MOS Capacitors
  8. Metal Semiconductor Contacts

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Microelectronics Materials and Devices Crystal Structure Crystal Structure and Ordering
Lesson 2, Topic 3
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Crystal Structure and Ordering

Abdulaziz July 26, 2020
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Types of Solids
Solids are ordered according to 3 types: amorphous, polycrystalline, and single crystal.

Amorphous
Polycrystalline
Crystalline

some short range order, no long range order in the positioning of atoms

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Example:

  • Amorphous Si thin film transistors used as switching devices in LCDs
  • Polycrystalline Si used as gatein MOSFETs
  • Actual active region of MOSFET is fabricated in crystalline Si

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