Transistor Overview
Fab area overview
858 process flow
Fab tour - Optional
858 Process Flow
Transistor
Overview
Fab-18, Training
Basic Terms
• Atom - The smallest division of an element.
• The basic components of an atom are:
• Protons - positive charge (“+”)
• Electrons - negative charge (“-”)
• Neutrons - no charge
• An object is negatively charged when there are more electrons then protons.
• An object is positively charged when there are
Conductor - A material that has atomic structure which permit rapid movement of free electrons.
Insulators - A materials that has all his electrons are tightly held to the nucleus of the atom and present considerable resistance.
Semiconductors - With the right power control the material can be use as conductor or as isolator.
Current - Movement of electrons (from “-” to “+”).
Note - The current direction is always in the opposite to the electrons direction.
Build the wafer
• Made out from quartz which contained in send.
• In thermal process we melting and distilled the sand.
• A mono crystal seed is inserted into the melted silicon, and as the seed rotates in the melted silicon, a crystal is grows.
• The process takes few days and then it’s slowly extracted and we ending with 5 foot-long ingot of Silicon.
• Cutting the ingot to wafers.
