# Need Help on technical question...

#### pat

##### Expert
Maybe it is because with small bump, you don't stress too much at the time and circuits can adjust and become more tolerant.

A big bump just put too much stress too fast and maybe the circuit have trouble to compensate that fast.

Think at you.. If you jump in hot water, you'll probably want to get out fast.. but if I put you in a big cauldron, and I heat it slowly, you'll be fine at Christmas meal...

#### RichPLS

##### Champion
So every time you turn off PC, you have to go through this process?

#### pat

##### Expert
No. because silicon would have been used to that now..

#### RichPLS

##### Champion
Oh, so it permanently changes the silicon?

#### pat

##### Expert
I guess.. Just like when you got a new car, you break in the engine..

#### margag_

##### Distinguished
Here is an explication..no for the newbies....prepare to suffer...

In electricity, a conductor is a material like copper or silver which readily conducts electricity, while an insulator is the opposite: A material which doesn't conduct electricity well. In other words, a conductor has a very low resistance, and an insulator has a very high resistance. A semiconductor is a material that lies somewhere in between: It will sort of conduct electricity, but has a fair amount of resistance. Although not commonly cited as a "semiconductor", carbon exhibits this property: Electricity can conduct through carbon, but carbon does have a significant resistance, and much of the electrical energy will be lost as heat energy when it passes through carbon. Not coincidentally, carbon happens to be used frequently to make resistors.

The electrical conductivity of an element is related to how many valence electrons an atom of that element has. An atom is orbited by electrons, but not all of these electrons orbit in the same place; there are different layers of space surrounding the nucleus of an atom in which electrons can exist. Each of these spaces is called a shell. Usually, electrical engineers are most interested in the outermost shell of atoms. The outermost electron shell is called the valence shell, and electrons which exist in the valence shell are called valence electrons.

Once again, it is no coincidence that the semiconductor elements all have the same number of valence electrons: Four. The common semiconductor elements are carbon (C), silicon (Si), germanium (Ge), and antimony (Sb). All of these are "Group IV" elements, meaning they have four valence electrons.

When people talk about "semiconductors" in the PC era, they are usually talking about silicon. Silicon is the most common element on planet Earth (about 28% of all matter on the planet is silicon), so it's relatively easy to come by, but for chip-making purposes, it's not as cheap as you might expect: The silicon used in chips must be super-refined.

In any case, in a basic configuration of pure silicon, the silicon atoms actually form a very tidy grid. The silicon atoms share covalent bonds, which are chemical bonds formed when two atoms share two electrons with each other (i.e. one electron from one atom enters the valence shell of the other atom, and one electron from the other atom enters the valence shell of the first atom). Each silicon atom, then, is bonded to four others: One above it, one below it, one to the left, and one to the right. Each atom has eight electrons around it (because each bond adds an additional electron to the atom's valence shell).

What makes semiconductors like silicon particularly useful is how readily their conductivity can be changed by doping. On its own, silicon is only a mediocre conductor, but the conductivity of it can be changed quite significantly by doping, which is the process of embedding a very small amount of atoms of other elements within the silicon. Typically, only about one in a million silicon atoms are replaced with atoms of some other element, but that one in a million makes a surprisingly big difference.

Even more interesting is how doped silicon responds to the application of electrical voltage. It turns out that by applying different electric charges to doped silicon, you can actually change how conductive or resistive that silicon is. It is this effect which made the invention of the transistor possible.

So yes Pat is right the silicone and semi-condutors are 'proactive and reacts to the environement.

D'ont thanK me thank goes to

http://www.geocities.com/SiliconValley/2072/index.html

#### pat

##### Expert
So yes Pat is right the silicone and semi-condutors are 'proactive and reacts to the environement.

That's something you'll become familiar with ...

#### Fastboatslowcomp

##### Distinguished
Not knowing the first thing about the various theories of why you would want to boost your voltages in small increments I ask this question: In boosting in small increments can you be testing the system for weakness without causing harm? In other words will a weakness in the circuitry show up as instability with small increases rather than damage if steps are too large?

#### margag_

##### Distinguished
Un jour je serai calif à la place du calif... (Iznogoud)

But for now i will keep an eye on you and keep on learning.... :roll:

(No problem i like silver medals you know)

:!: And the Gold goes to.... Pat :!:

#### pat

##### Expert

Where in quebec are you??

#### margag_

##### Distinguished
Look at this http://www.the12volt.com/ohm/ohmslaw.asp

The switching power supply try to keep an equilibrium defined by the ohm's law.

The temparature affects the conductivity of materials.

So if you push a 'micro tinny volt' to hard and the balance is lost you may
lock up or fry everything.... some have luck some d'ont...

#### margag_

##### Distinguished
I am from downtown Quebec but i live in Val-Bélair.

#### pat

##### Expert
J'habite pres de grand-mere..

#### margag_

##### Distinguished
La très belle rivière St-Maurice avec sont Pont suspendu.

Une très belle place, j'aimerais pouvoir en dire autant...
mais ici à val-bélair c'est la vie sauvage...le paradis du skidoo.

J'ai pas de skidoo alors..

#### pat

##### Expert
J'ai pas de skidoo alors..

Je ne veux pas faire ma langue sale, mais.. t'as pas de skidoo... est-ca parce que t'as pas de galerie?[/vieille joke plate] :twisted:

#### margag_

##### Distinguished
Yes i think so..

If you heat up the bands they will expand (not evenly) and reduce the band gap thus affecting the equilibrium and the conductivity.

#### margag_

##### Distinguished
C'est ben correct,

C'est vrai qu'a VB il y a des skidoo sur des gallerie (Oui j'ai un patio)

Attention je te donne une exclusivitée..

A VB IL Y A DES PETIT GARAGES A SKIDOO
DEVANT LES BARS DE DANSEUSES. 8O

Pour Vrai, no joke...

Le skidoo ici c'est du sérieux :!:

8O

Only in VB..

#### RichPLS

##### Champion
Thank you very much for that reply. (You too Pat!) I understand better now.

#### pat

##### Expert
Happy to have helped ...

BTW, when my tower will be up, I'll send you a picture..

#### endyen

##### Splendid
And now for the rest of the story.
A new, unused conductor is not as good as an older, well used conductor.
This is more true in direct current aplications and high voltage aplications, than in standard ac aplications. This is due to a condition known as patinaing.
In dc and hv, a large part of the current is carried on the outside of the conductor. As the current is carried, it sets up the conductor to work better on the outer edge. In copper wire, you can see this in a nice even chestnut brown color. This is known as patina.
This type of setup makes bothe the conductors on the mobo, and the pathways in the chips, better able to function.
A word of caution. While this process is called "burn-in" too much heat will destroy conductivity.

#### margag_

##### Distinguished
Happy to have helped.. and learned a few things too. :idea: