Silicon Definition and 199 Threads

Research-related question: What is the typical on/off ratio of a silicon transistor? This seems like basic information, but I can't find it anywhere. Also, how high does the on/off ration need to be in order for transistors (say, in a logic circuit) to function correctly? Thanks!

Is Silicon chemistry very similar to Carbon chemistry? Being in the same column with the same number of valence electrons, I assume it would be? Would I be able to use the same mechanisms I learned in my Organic Chemistry class? I ask because I'm trying to synthesize PEG-trimethoxysilane...

hi everyone... i have got a general doubt...I have heard that silicon is transparent to infrared...so does that mean that any IR wave entering silicon comes out of it without any change? Is silicon 100% transparent to IR? does the transparency depend on temperature or any other parametre...

Homework Statement I have to find the value of the Fill Factor of the silicon photocell. I graph for current, voltage and power. I got this as a value 1.6x10-2 Is this the correct answer ? I just need the real value so I can compare it with my results .. Homework Equations Pmax/Po The...

Homework Statement "A cylinder of n-doped silicon is 10mm long, has a diameter of 5 mm and is known to have a mobility \mu=0.15 m2V-1s-1. The resistance of the block measured along its length is 255 \Omega a) What is the resistivity of the silicon block? b) Estimate the electron carrier...

People should be allowed to use siliconal devices that can be used to control their own emotional sensations on demand.

Why is the Earth made up of so much silicon?

Hey there. I have a question concerning the effective masses in silicon. From what I've learned, the effective masses of electrons and holes can be determined from the curvature of the dispersion curve at the extrema. Since the effective mass is inversely proportional to the second derivative...

what lead to the discovery of silicon & how is it extracted commercially & how can it be done at home aswell?

Hi all. A little while ago I overheard my cousin chatting with a friend who works in the semicon industry about the binning process. He was specifically talking about MPU binning techniques in use nowadays and I overheard him mention something to the sound of "boutique line binning". :confused...

I 'trying to find the thermal conductivity of a silicon substrate doped with boron with known dopant concentration. Is there any way to calculate it or it has to be measured. Thanks in advance for any advice.

Homework Statement I need to find the temperature coefficient of resistivity \alpha for silicon at the temperature of T=300 Kelvin. I am supposed to assume that \tau, the mean time between collisions of charge carriers, is independent of temperature. Homework Equations Temperature...

Hi This semester my group and I are calculating the band structure of silicone (bulk and nano crystals). In bulk silicon a indirect band gap occurs, where the highest occupied valence band and the lowest unoccupied conduction band are situated at different k-values. Does anyone know why...

When considering a vibrating silicon atom. I'm just not sure how to do the conversion o.O

I've looked everywhere. Can someone tell me if there is a half cell potential for silicon? Si(0) ---> Si(4+) + 4e Every list of the galvanic series on the web that I have seen has no data for silicon.

Does anyone know what the output is like from beta-voltalics? And how much radiation is needed and how much silicon? Thank you in advance.

Interesting article I read on how the highly-conductive graphene also begins to exhibit some semiconductive properties at very narrow dimensions: http://www.technologyreview.com/Nanotech/20119/ http://physicsworld.com/cws/article/news/32539 Gee, I wonder if this could keep Moore's Law going?

What is Silicon Valley really like? Obviously, many big name tech companies are there, but what's the atmosphere like? Is it like any other city (but more expensive)? Are there tons of opportunities there? If I were to move there and work full time as an EE, would I also be able to...

As I'm interested in the simplifications of property tensors due to crystal symmetry, I have been trying to find the symmetries of silicon (i.e. the diamond structure). As silicon belongs to the m3m point group I would e.g. expect to find a mirror plane perpendicular to the [100], [010] and...

Homework Statement A silicon sample is doped with 5.0 X 10^19 donor atoms/cm^3 and 5.0 X 10^19 acceptor atmos/cm^3 a)What is its resistivity? b)Is this an insulator, conductor or semiconductor? c)Is this intrinsic material? Homework Equations No clue.. this is where I need help The...

Homework Statement I am just starting an essay on this topic and gathering info from different sources, this is the best source of info i have came across! Homework Equations Do you think it likely that life elsewhere could be silicon based? What are the similarities and...

Hello, can any tell website where i can find Permittivity,Permeability and conductivity(or resistivity) of silicon, silicon nitride and aluminum.thanks and also if anyone has worked in ELECTROMAGNETIC module of Intellisite (version 8.1)for RF MEMS Switches please do tell me i need some guide line.

Hi, is there a way to calculate the two-photon absorption coefficient of silicon? I am especially interested in the two-photon absorption coefficient of silicon for the wavelengths 1030nm, 515nm and 343nm. Thanks for any help!

When an N-type silicon and a P-type silicon are joined together electrons from the n-type diffuse into the p-type. Now the p-type becomes negatively charges and the n-type positively charged. With forward biasing electrons are forced from the n region into the p region. What is it that makes the...

I was wondering whether it is possible to use photochromatic switching effects, for photonic structures on silicon. The problem might be that silicon is not transparent for the same wavelengths as photochromic materials. So basically, I was wondering if somebody knew about applications...

why should silicon exhibit metallic luster when viewed in visible light, yet be transparent when viewed in infrared light?

My understanding is that it would be very unlikely (if not impossible) for a non-carbon based life form to exist because of carbon's incredible ability to bond (it can both get or give up 4 electrons). But silicon also shares this same property. why is organic material so much more common, and...

I have to utilize a Curve Tracing machine on a 5V Zener Diode for a lab. The curve tracer shows voltage vs. current. The lab asks me to examine the curve and determine whether it is a Silicon or Germanium diode, but I'm wondering...what would be different about the graphs of the two types? Wont...

If you missed the paper in this week's Nature, let's just say that this is an unexpected discovery. You can read a report of it in PhysicsWeb http://physicsweb.org/articles/news/10/11/19/1 Zz.

Hi, my labmates and I are trying to fabricate a functional organic semiconductor; however we are having problems indicative of surace leakage between the gate and drain, or oxide breakdown (Fowler-Nordheim or otherwise). So now we're trying to test our silicon wafer without the organic...

How does work the two-photon absorption ? Does it exist a Beer-Lambert law for this kind of process? If yes, does someone know where i could find the order of magnitude of two-photons absorption coefficient for silicon at 1500 nm ? Barth

Hello all. I am finishing up my first year of a CE/EE major. I want to go into IC design; primarily for CPU's. I was wondering what you guys think that CPU's will use photonics extensively within the next 8-10 years. If the average CPU is photonic based within the next ten years, shouldn't...

Hi all, I wonder whether anybody could help me finding the surface energy value of the interface between silicon and SiO2... Thanks in advance ! Mr. G

Hi all, I wonder whether anybody could help me finding the surface energy value of the interface between silicon and SiO2... Thanks in advance ! Mr. G

Hello all, I've been tasked with drawing the I-V characteristics of a silicon p-n junction diode and I've managed to do that fine. Now, I've been tasked with showing how this curve will vary with temperature (200-400 deg.c) and by illumination with light of photon energy greater than the...

I want to know if the orientational polarization should be included when you calculate the permittivity of the silicon oxide (both crystal and amorphous)?

I am trying to find a way to calculate the Ec for intrinsic silicon at room temperature. I can't seem to find anything in my textbook for that. I have searched on line and the closest thing I can find is E_c = E_g + \frac {\hbar^2 k^2}{2m_e} I know what Eg = 1.12 eV for intrinsic silicon at...

We know quartz,viz. crystal silicon oxide is a kind of piezoelectric solid.Does the amorphous silicon oxide present piezoelectricity also. If not,Why? -------------------------------------------------------------------------- I'm not good at English, so if there is any language errors in my...

Hey Guys I Have Assignment On Poly Crystalline Silicon Farication Process Plzzzz Tell Me About That And Tell Me The Website If U Have Any Thanks.

How are materials like Silicon Carbide or Aluminium oxide which are strong and have high melting points shaped and cut? Just wondering. Is a diamond tipped cutter used or something?

hi all, I am new here so if i break any rules please correct me er I am puzzled over an assignment and have no idea how to search for it, the question ask for the elements that was used to make semiconductor componets before it was replaced by silicon.. please help..a site help would do just...

What gives silicon that 'grey painted glass' look. No other element i can think of has such a distinctive color and surface texture.

Hey all Why does Silicon Dioxide have a Giant molecular structure, while Carbon dioxide is made of simple molecules? They both have 4 electrons on their valence shells, so why wouldn't Silicon Dioxide be a simple linear molecule? (gaseous).

Hi! Is silicon inert? i.e. can I clean it from deposited films with e.g. HNO3 and H2SO4 without etching the silicon itself? What about amorphous carbon?

i am writing a lab report into an experiment i did using a photodiode to detect alpha particles. I am curious however as to how a photodiode actually works. The alpha particles are emitted from the source, they hit the diode and then what happens? Its somehow changed into an electrical signal...

In terms of the semiconductor Silicon: N types have on more free electron added to its structure from doping an impurity on it. Such as an arsenic impurity onto a pure intrinsic silicon crystalline structure. However wouldn't it having one more electron inside of it that is bound to the...

y is silicon only is used for semiconductors y not other

Does anyone have any information about SOI. I've heard lots about it yet all i know of it, other than its benefits, is that instead of a metal on the oxide it uses a silicone. What is this silicone's structure, etc. Just some basic information about it would be great.

Its been a rough week I have posted 3 times. A digital thermometer uses pure silicon thermistor as its sensing element. When it is used to measure the temp of a sick child the element drops to 99.06% of its normal value at standard body temp of 37 degrees. What is the temp of the sick child...