Crossword clues for semiconductor
Longman Dictionary of Contemporary English
Douglas Harper's Etymology Dictionary
n. (context physics English) A substance with electrical properties intermediate between a good conductor and a good insulator.
n. a substance as germanium or silicon whose electrical conductivity is intermediate between that of a metal and an insulator; its conductivity increases with temperature and in the presence of impurities [syn: semiconducting material]
Semiconductors are crystalline or amorphous solids with distinct electrical characteristics. They are of high resistance — higher than typical resistance materials, but still of much lower resistance than insulators. Their resistance decreases as their temperature increases, which is behavior opposite to that of a metal. Finally, their conducting properties may be altered in useful ways by the deliberate, controlled introduction of impurities (" doping") into the crystal structure, which lowers its resistance but also permits the creation of semiconductor junctions between differently-doped regions of the extrinsic semiconductor crystal. The behavior of charge carriers which include electrons, ions and electron holes at these junctions is the basis of diodes, transistors and all modern electronics.
Semiconductor devices can display a range of useful properties such as passing current more easily in one direction than the other, showing variable resistance, and sensitivity to light or heat. Because the electrical properties of a semiconductor material can be modified by doping, or by the application of electrical fields or light, devices made from semiconductors can be used for amplification, switching, and energy conversion.
The modern understanding of the properties of a semiconductor relies on quantum physics to explain the movement of charge carriers in a crystal lattice. Doping greatly increases the number of charge carriers within the crystal. When a doped semiconductor contains mostly free holes it is called " p-type", and when it contains mostly free electrons it is known as " n-type". The semiconductor materials used in electronic devices are doped under precise conditions to control the concentration and regions of p- and n-type dopants. A single semiconductor crystal can have many p- and n-type regions; the p–n junctions between these regions are responsible for the useful electronic behavior.
Although some pure elements and many compounds display semiconductor properties, silicon, germanium, and compounds of gallium are the most widely used in electronic devices. Elements near the so-called " metalloid staircase", where the metalloids are located on the periodic table, are usually used as semiconductors.
Some of the properties of semiconductor materials were observed throughout the mid 19th and first decades of the 20th century. The first practical application of semiconductors in electronics was the 1904 development of the Cat's-whisker detector, a primitive semiconductor diode widely used in early radio receivers. Developments in quantum physics in turn allowed the development of the transistor in 1947 and the integrated circuit in 1958.
Semiconductor (also Semiconductor Films) are British artist duo Ruth Jarman and Joe Gerhardt producing computer animation.
A semiconductor is a material with electrical conductivity due to electron flow intermediate in magnitude between that of a conductor and an insulator.
Semiconductor or semi-conductor may also refer to:
- Semiconductor device, an electronic component that exploits the electronic properties of semiconductor materials
- Semi-Conductor (album), a compilation album by Larry Fast
- Semiconductor (artists), also known as Semiconductor Films, names used by British art duo Ruth Jarman and Joe Gerhardt
Usage examples of "semiconductor".
The electron microscopy and X-ray data in the government report led him to the conclusion that there were pseudorandom semiconductor and unlike metal junctions.
The electron microscopy and X ray data in the government report led him to the conclusion that there were pseudorandom semiconductor and unlike metal junctions.
Several groups have also looked at the photoreduction of metal ions out of solution onto a semiconductor surface.
The metallorganics that fuse DNA with semiconductor and comprise his brain have few nerves of their own.
By the way, using semiconductors for the photocatalytic destruction of water pollutants has also been a huge research focus over the last couple of decades.
What humans call light and microwaves are only different regions in the electromagnetic spectrum, so resize and recalibrate new semiconductor structures to emit microwaves.
Analysis showed it to be made of various semimetal materials, such as were unknown to us, created from what we could have called artificial atoms, where semiconductor dots contained thousands of electrons.
Using patent data in the semiconductor industry, Song and his coworkers show how Korean and Taiwanese semiconductor firms were able to catch up to the leading-edge U.
We can compare the quantitative predictions of quantum theory with the measured wavelengths of spectral lines of the chemical elements, the behaviour of semiconductors and liquid helium, microprocessors, which kinds of molecules form from their constituent atoms, the existence and properties of white dwarf stars, what happens in masers and lasers, and which materials are susceptible to which kinds of magnetism.
Here is a miniboom of look-alike public housing, the pickup-crowded parking lots of Fairchild Semiconductor, the bustle of the oil and gas industry, the beginnings of a tourist industry.
Reverend Jim Jones, a Jim Jones for the high-tech age, Jim Jones with a silicon heart and tightly packed semiconductors between the ears.
Rattlesnakes and doped semiconductors detect infrared radiation perfectly well.
From the rear window panel of the van, the invisible beam of the device's near-infrared semiconductor laser diode had been aimed at a ninety-degree angle through the back windshield at the Fiat's rearview mirror.
They combine P3HT, a semiconductor polymer, with carefully sized microclusters of cadmium selenide.
Built around nanotechnologies, the microelectromechanical systems combined computers with tiny semiconductor chips.