** Mako: ** as a metal conductor, for containing a large number of electrons can move freely, it is convenient to use as a conductor; and rubber and clouds
Mother like an insulator, electrons can not move because it is almost, is an excellent insulating material
material. In contrast, semiconductor, although ambiguous, but it happens extremely important in electronic circuits, this is why?
** Doc:. ** state conductors and insulators are stable, either through current can be very smoothly,
Either they pass almost no current, it is "entirely different" is. However, resistivity of the semiconductor will vary with the outer
Changes in industry conditions change, is unstable. From the point of view of electrical characteristics, which can be generated artificially
Kind of instability is indeed very useful.
** Mako: ** Oh, what does this mean ah!?
** Doc:. ** We can draw an analogy to illustrate these issues. There is a road, located on the road
Set some stakes, pedestrians on the road can be compared to electrons. If the stakes are fixed in position, then the people
It does not bother can easily pass through. This is equivalent to the conductor. However, if the road has a large
The amount of the stakes, and the display was disorganized and want to pass would be struggling. This is equivalent to an insulator.
As for the semiconductor, stakes a bit like setting position according to the wishes of our road. Therefore, if excessive increase in stakes, the road will be difficult to pass, while reducing the number of stakes it can make the passage easier. Stakes number and placement of conductors and insulators are different, although it is in an unstable state, but just press
People intent stakes configuration, it is possible to control the degree of difficulty of access.
For conductors and insulators, because they can not determine the physical characteristics to achieve such control.
However, for a germanium (Ge) and silicon ( Si ) element of such cable manufacturing diodes and transistors, however, it may be fine processing according to our wishes. That's why semiconductor shine.
** Doc:. ** So, specifically, how should I do to make it a good transistor and a diode, and now it will make the idea of diodes and transistors and other devices through a simple flow chart form, tell us about?.
In the production of semiconductor devices such as transistors and diodes, we referred to as a first p-type semiconductor and making n
The so-called semiconductor type semiconductor material. The semiconductor is a significant change in the electrical characteristics would latter incorporating a small amount of impurity-sensitive material. Thus, when a person needs to intentionally doped with n-type impurity is made from outside or p-type semiconductor
, the advance must be made of a high purity semiconductor crystal. Such a semiconductor is called a high-purity intrinsic semiconductor.
The single crystal structure of the silicon intrinsic semiconductor. When viewed in a structure in which each atom, the electron will be found (called valence electrons) in combination with other atoms by covalent very stable on its outermost track.
If a small amount of arsenic (As) or boron to such an intrinsic semiconductor ([B] element, the former will be made
n-type semiconductor, which will be made of p-type semiconductor. Due to the incorporation of these "impurities", covalently bound to a silicon atom are disrupted, even if the excess free electrons in the n-type semiconductor, p is type semiconductor due to lack of free electrons and holes generated excess.
Like intentionally incorporated in the intrinsic semiconductor impurity to produce n-type semiconductor and p-type semiconductor, and then joined by the n-type semiconductor and p-type semiconductor, the electronic device can be fabricated as transistors and diodes.