What is a wafer?
In electronics, a wafer (also called a slice or substrate) is a thin slice of semiconductor, such as a crystalline silicon (c-Si), used for the fabrication of integrated circuits and, in photovoltaics, to manufacture solar cells.
The wafer serves as the substrate for microelectronic devices built in and upon the wafer..
What is a wafer in medical terms?
(wā′fĕr) A thin envelope or disk used to enclose a medication or to separate two structures from one another. Medical Dictionary, © 2009 Farlex and Partners.
What are the ingredients in wafers?
Wafers are formed from flour and water dispersions (batter) with small amounts of fat, sugar, salt and sodium bicarbonate, which are mixed and then confined in preheated moulds3. Yeast may be used in place or in addition to sodium bicarbonate.
Why is the crystal orientation of a wafer important?
The orientation is important for the electronic properties of the wafer. Ion implantation depths depend on the orientation and it will affect the paths for transport. The different planes have different arrangements of atoms and lattices so it will affect the way the electricity travels in the circuit.
How wafers are fabricated?
Wafer fabrication is a procedure composed of many repeated sequential processes to produce complete electrical or photonic circuits on semiconductor wafers. … Wafer fabrication is used to build components with the necessary electrical structures.
What is silicon ingot?
A salami-shaped bar of silicon, which is a single crystal, technically known as a “boule.” The ingot is the first step in chip making. … See wafer, chip package and transistor. Drawing the Silicon Ingot. An ingot is being drawn from a furnace containing molten silicon.
What is the difference between wafer and waffle?
As nouns the difference between waffle and wafer is that waffle is (countable) a flat pastry pressed with a grid pattern or waffle can be (uncountable) speech or writing that is vague, pretentious or evasive while wafer is a light, thin, flat biscuit.
Why is wafer round?
They Are Circular from the Start The silicon ingots that are used to grow the wafer are circular in shape. This is due to the process of dipping a seed crystal into molten silicon and rotating and slowly extracting as the crystal grows.
How do you make a silicon wafer?
To make wafers, silicon is purified, melted, and cooled to form an ingot, which is then sliced into discs called wafers. Chips are built simultaneously in a grid formation on the wafer surface in a fabrication facility or “fab.”