vb.net barcode reader code Part II in Software

Encoding Quick Response Code in Software Part II

Part II
Quick Response Code Scanner In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
Encoding QR-Code In None
Using Barcode creator for Software Control to generate, create QR Code ISO/IEC18004 image in Software applications.
Electronics
QR Code JIS X 0510 Decoder In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
QR Code ISO/IEC18004 Creation In Visual C#.NET
Using Barcode drawer for Visual Studio .NET Control to generate, create QR Code ISO/IEC18004 image in .NET framework applications.
right, in the sketch of Figure 82 This phenomenon becomes relevant when an external electric eld is applied to the material It is important to point out here that the mobility that is, the ease with which charge carriers move across the lattice differs greatly for the two types of carriers Free electrons can move far more easily around the lattice than holes To appreciate this, consider the fact that a free electron has already broken the covalent bond, whereas for a hole to travel through the structure, an electron must overcome the covalent bond each time the hole jumps to a new position According to this relatively simpli ed view of semiconductor materials, we can envision a semiconductor as having two types of charge carriers holes and free electrons which travel in opposite directions when the semiconductor is subjected to an external electric eld, giving rise to a net ow of current in the direction of the electric eld Figure 83 illustrates the concept An additional phenomenon, called recombination, reduces the number of charge carriers in a semiconductor Occasionally, a free electron traveling in the immediate neighborhood of a hole will recombine with the hole, to form a covalent bond Whenever this phenomenon takes place, two charge carriers are lost However, in spite of recombination, the net balance is such that a number of free electrons always exist at a given temperature These electrons are therefore available for conduction The number of free electrons available for a given material is called the intrinsic concentration, ni For example, at room temperature, silicon has ni = 15 1016 electrons/m3 (81)
QR Code ISO/IEC18004 Printer In VS .NET
Using Barcode creator for ASP.NET Control to generate, create Denso QR Bar Code image in ASP.NET applications.
QR Code JIS X 0510 Printer In Visual Studio .NET
Using Barcode creator for Visual Studio .NET Control to generate, create QR Code JIS X 0510 image in VS .NET applications.
Electric field + + + + Net current flow
Encoding QR In VB.NET
Using Barcode generator for VS .NET Control to generate, create QR image in Visual Studio .NET applications.
Print Code39 In None
Using Barcode encoder for Software Control to generate, create Code 39 Full ASCII image in Software applications.
Note that there must be an equivalent number of holes present as well Semiconductor technology rarely employs pure, or intrinsic, semiconductors To control the number of charge carriers in a semiconductor, the process of doping is usually employed Doping consists of adding impurities to the crystalline structure of the semiconductor The amount of these impurities is controlled, and the impurities can be of one of two types If the dopant is an element from the fth column of the periodic table (eg, arsenic), the end result is that wherever an impurity is present, an additional free electron is available for conduction Figure 84 illustrates the concept The elements providing the impurities are called donors in the case of group V elements, since they donate an additional free electron to the lattice structure An equivalent situation arises when group III elements (eg, indium) are used to dope silicon In this case, however, an additional hole is created by the doping element, which is called an acceptor, since it accepts a free electron from the structure and generates a hole in doing so Semiconductors doped with donor elements conduct current predominantly by means of free electrons and are therefore called n-type semiconductors When an acceptor element is used as the dopant, holes constitute the most common carrier, and the resulting semiconductor is said to be a p-type semiconductor Doping usually takes place at such levels that the concentration of carriers due to the dopant is signi cantly greater than the intrinsic concentration of the original semiconductor If n is the total number of free electrons and p that of holes, then in an n-type doped semiconductor, we have n and p pi (83) ni (82)
Drawing Data Matrix In None
Using Barcode generation for Software Control to generate, create DataMatrix image in Software applications.
Code 128A Generation In None
Using Barcode creator for Software Control to generate, create Code 128 image in Software applications.
; ;;
Barcode Generator In None
Using Barcode drawer for Software Control to generate, create barcode image in Software applications.
UPC-A Supplement 2 Generation In None
Using Barcode printer for Software Control to generate, create UPC-A image in Software applications.
An external electric field forces holes to migrate to the left and free electrons to the right The net current flow is to the left An additional free electron is created when Si is doped with a group V element Si Si _ Si _ As Si Si As Si Si
ISSN - 10 Drawer In None
Using Barcode printer for Software Control to generate, create International Standard Serial Number image in Software applications.
Printing Barcode In .NET
Using Barcode generation for Reporting Service Control to generate, create bar code image in Reporting Service applications.
UPC Code Encoder In None
Using Barcode maker for Online Control to generate, create UPC A image in Online applications.
Drawing UPC Symbol In Java
Using Barcode creation for Java Control to generate, create Universal Product Code version A image in Java applications.
Barcode Reader In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
Recognize Code 128 Code Set B In Visual Basic .NET
Using Barcode scanner for Visual Studio .NET Control to read, scan read, scan image in .NET applications.
Data Matrix Maker In Java
Using Barcode drawer for BIRT reports Control to generate, create Data Matrix image in Eclipse BIRT applications.
UCC - 12 Decoder In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
Copyright © OnBarcode.com . All rights reserved.