n-type silicon

(redirected from N-type)
Also found in: Dictionary, Wikipedia.
Related to N-type: n-type semiconductor

n-type silicon

The use of n-type and p-type silicon is a foundation concept in the design of transistors. Pure silicon is not conductive. However, it can be made conductive by adding other elements to its crystalline structure, which then become known as "n-type" or "p-type" silicon.

The interaction of n-type and p-type silicon to electric fields and to each other is used to make areas in a transistor change from conductive to non-conductive and vice versa (see crystalline semiconductor). See FET, MOSFET, bipolar transistor and doping.

N-Type (Negative)
N-type silicon is silicon that has been chemically combined (doped) with phosphorus gas to make it conductive. A silicon atom has four electrons in its outer shell and bonds tightly with four surrounding silicon atoms creating a crystal matrix with eight electrons in the outer shells. However, phosphorus has five electrons, and when combined, the fifth electron becomes a "free" electron that moves easily within the crystal when a voltage is applied. Because the charge carriers are electrons, n-type refers to a negative charge.

P-Type (Positive)
In contrast, p-type silicon is silicon doped with boron gas that turns it into a conductive material that readily accepts electrons when voltage is applied. Boron has only three electrons in its outer shell and can bond with only three of the four surrounding silicon atoms. This leaves one silicon atom with a vacant location in its outer shell, called a "hole," that readily accepts an electron. Because the charge carriers are holes, p-type silicon is said to have a positive charge.

N-Type and P-Type
This is a very conceptual illustration of the atomic structure of n-type and p-type silicon. (Image courtesy of TechBites Interactive, www.techbites.com)
References in periodicals archive ?
This N-type PERT module was made from independently developed N-Type high efficiency cell technology, highly reliable materials, advanced equipment and fully automated manufacturing procedure.
In addition, N-type PERT mono-crystalline silicon solar module has passed the full mechanical load test of 10800Pa, reaching the highest load level of the industry which is tested and certified by CSA, an international third party authoritative institution.
In the present work, three new designs for p-n junctions were formed with p-and n-type polyacrylamide hydrogels (PAAm) doped with positive ([Na.
8220;Our new lines of N-Type and SMA test cables using our PE-P141 coax are a great addition to our growing range of test and measurement products,” says Gerry Camacho, VP of Technical Marketing at Pasternack Enterprises, Inc.
With the recent acquisition of Argonne's low temperature diamond technology, AKHAN plans to fabricate thin film n-type NCD devices on-Fused Silica (Glass) 4" wafers at CMOS compatible thermal budget.
With regard to an OPV cell that serves as a low-cost and flexible power-generating device after coating, in particular, almost all manufacturers have decided to adopt Fullerene as the standard material for n-type semiconductor.
For decades, each logic element in a computer chip has consisted of complementary n-type and p-type transistors whose clever arrangement drastically reduces the chip's power consumption.
Conceivable Recipe Options POP OR DUAL PRINT SELECTIVE EMITTER REAR SIDE PASSIVATION P-Type Yes Yes Yes n-Type Yes Yes Yes MWT Yes Yes Yes EWT No No Yes
However, HT-SAAE is one of the few module manufacturers who will make a commitment to the market in the field of the new technological product -- N-type Pert bifacial dual glass module.
This has been achieved by way of the world's first shallow n-type diamond material over silicon.
Then, all that is required is printing of the two different metallizations; silver for the n-type and aluminum for the p-type.
A newly identified toxin from the American Funnel Web spider acts on T-type and N-type calcium channels, researchers have discovered.