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Is silicon a semiconductor?
Yes,silicon and germanium are semiconductors.
The conclusion of a silicon controlled rectifier?
conclusion of silicon control rectifier
When was Silicon Valley Power created?
Silicon Valley Power was created in 1896.
How does doping effect the depletion layer in a semiconductor?
A semiconductor has an energy band (a range of energy levels) that is forbidden -- ideally void of charged particles at all temperatures. Practically, at low temperatures (T < 40 K for silicon), the probability of finding a free charge carrier outside the forbidden gap is nearly nil. When the temperature is increased, the probability of finding a free charge carrier outside the forbidden gap increases, but the net charge is still zero (negative charge exactly cancels positive charge). However, an intrinsic semiconductor (pure or undoped) is just a resistor of little importance (other materials are cheaper and better-controlled than a semiconductor). When we introduce foreign atoms into a semiconductor (the process is called doping), we change its electrical properties -- it has a lot more free charge carriers than an intrinsic semiconductor, although again, the net charge is zero. The total charge of free carriers is balanced by immobile ions of equal and opposite total charge. For example, boron and indium will be used to dope silicon p-type; phosphorus and arsenic will be doping silicon n-type. I am quoting boron, phosphorus, and silicon as examples from hereon. p-type doping is a process where a silicon atom in the lattice is replaced by a boron atom. A Boron atom has 3 electrons in the outer shell, compared with an electron occupancy of 4 for a silicon atom. So a Boron atom provides a vacancy for any free electrons to occupy with a little effort, when an electron chances to be nearby (the four boron-silicon covalent bonds needs 8 electrons to be stable, but only 7 are provided). The net charge of the material is still zero. More about from where the free electron is coming. n-type doping is using a phosphorus atom to replace a silicon atom. A phosphorus atom has 5 electrons in the outer shell. So a phosphorus atom provides an electron that can be freed with a little effort (the four phosphorus-silicon covalent bonds only need 8 electrons to be stable, each atom needing only to contribute four electrons; the 9th electron will be loosely bound). The net charge of the material is still zero. Where can the electron go? Magic happens when a p-type silicon is brought in contact with an n-type silicon to form a pn junction. The excess electron vacancies (holes) in p-Si now can exchange with the excess electrons in n-Si, but the net charge of the p-n silicon entity is still zero. However, microscopically, a depletion region is formed at the pn junction, where excess carriers can cross over to the other side. In the p-Si, excess electrons from the n-Si start filling up the holes (the lack of the 8th outer-shell electron to form the four stable boron-silicon covalent bonds) and negatively-charged boron atoms are formed. In the n-Si, excess holes from the p-Si start swallowing up the loosely-bound electrons (the 9th electron in the outer shell) of phosphorus atoms and positively-charged phosphorus atoms are formed. Once formed, and in the absence of an electric field, the depletion region now presents an energy barrier to any further carrier movement and a steady state results -- no net current in the pn junction.
Work function of poly silicon gate?
4.1 for N+ poly-silicon and 5.2 for P+ poly-silicon. That is supposedly the "classical CMOS value." These values depend on doping concentration in the poly-silicon and the specific sample. Thus, it may be best to determine them yourself if you need a more exact value. Source Silicon-on-insulator technology: materials to VLSI pg.136 By Jean-Pierre Colinge
What is the overall charge of the silicon-oxigen tetrahedron?
The overall charge of the silicon-oxygen tetrahedron (SiO₄) is -4. In this structure, silicon (Si) has a +4 charge, while each of the four oxygen (O) atoms carries a -2 charge. Therefore, the total charge from the oxygen atoms is -8, resulting in a net charge of -4 when combined with the silicon's +4 charge.
What is the nuclear charge of silicon?
The nuclear charge of silicon is 14. This means that a silicon atom contains 14 protons in its nucleus, which determines its position on the periodic table and its chemical properties.
How many electrons does silicon have at no charge?
Silicon's atomic number is 14, meaning it has 14 protons. Each of these protons carries a charge of +1, thus silicon has 14 positive charges in it. So, in order for it to have no charge, it must be balanced by 14 negative charges; therefore, neutral silicon has 14 electrons.
Is a silicon - oxygen bond polar?
A silicon-oxygen bond is considered polar due to the difference in electronegativity between silicon and oxygen. Oxygen is more electronegative than silicon, causing a partial negative charge on oxygen and a partial positive charge on silicon.
What is the total charge at the nucleus of silicon atom?
the nucleus of silicon contains neutrons and protons. neutrons are electrically neutral. The atomic no. of Si is 14, which means the Si nucleus contains 14 protons, so the charge at the nucleus of silicon atom is +14
Why does silicon-oxygen tetrahedron have a net -4 ionic charge?
The silicon-oxygen tetrahedron in minerals like quartz has a net -4 charge because each oxygen ion contributes 2 negative charges, while silicon has a 4+ charge. This results in a net charge of -4 for the tetrahedron as a whole.
What is the charge for sio2?
The charge for SiO2 is neutral overall. Silicon typically has a charge of +4, and oxygen has a charge of -2, so in SiO2, there is one silicon atom and two oxygen atoms, resulting in a neutral compound.
What is the valence number for silicon dioxide?
The valence number for silicon in silicon dioxide is +4. This means that silicon typically forms bonds where it has a charge of +4, such as in the SiO2 molecule.
How many protons do silicon have?
The number of protons in silicon is 14. The amount of protons in an element can impact its positive charge.
The charge of Silicone in SiO2?
In SiO2, silicon has a charge of +4 while oxygen has a charge of -2. This results in a neutral overall charge for the compound SiO2.
What is the net charge of a silicon atom if it gains three valence electrons?
The net charge of a silicon atom would be -3 if it gains three valence electrons. This is because each electron has a negative charge and adding three electrons would result in a total negative charge of -3. Silicon normally has 4 valence electrons, so adding 3 more would give it a total of 7 electrons, resulting in a net charge of -3.
How many electrons does silicon have when neutral?
Silicon has 14 electrons in the following orbital configuration 1s2 2s2 2p6 3s2 3p2, when neutral in charge.
