Crystal Structure and Ordering
Types of Solids
Solids are ordered according to 3 types: amorphous, polycrystalline, and single crystal.
some short range order, no long range order in the positioning of atoms
- 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