Whois & Analysis for cree.com

Cree, Inc. is an American worldwide manufacturer and marketer of lighting-class LEDs, lighting products and products for power and radio frequency (RF) applications.

Most of its products are based on silicon carbide (SiC), a rare, naturally occurring mineral compound which early Cree researchers successfully synthesized in a laboratory.

SiC enables higher performance in applications which require high endurance and in semiconductor devices that operate at high temperatures or high voltages, or both.

With the establishment of a reliable source for high-quality SiC, the firm expanded into several market segments with products that provided significantly higher performance and efficiency.

Cree's product families include LED lighting systems and bulbs, blue and green LED chips, high-brightness LEDs, lighting-class power LEDs, and a portfolio of SiC-based and wide bandgap SiC-on-GaN (gallium nitride) power-switching and RF (radio frequency) devices.

Semiconductors are crystalline or amorphous solids with distinct electrical characteristics.

They are of high electrical 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.

Radio frequency (RF) is any of the electromagnetic wave frequencies that lie in the range extending from around to, which include those frequencies used for communications or radar signals.

RF usually refers to.

A light-emitting diode (LED) is a two-lead semiconductor light source.

It is a p–n junction diode, which emits light when activated.

When a suitable voltage is applied to the leads, electrons are able to recombine with electron holes within the device, releasing energy in the form of photons.

This effect is called electroluminescence, and the color of the light (corresponding to the energy of the photon) is determined by the energy band gap of the semiconductor.

LEDs are typically small (less than 1 mm2) and integrated optical components may be used to shape the radiation pattern.

Silicon carbide (SiC), also known as carborundum, is a compound of silicon and carbon with chemical formula SiC.

It occurs in nature as the extremely rare mineral moissanite.

Synthetic silicon carbide powder has been mass-produced since 1893 for use as an abrasive.

Grains of silicon carbide can be bonded together by sintering to form very hard ceramics that are widely used in applications requiring high endurance, such as car brakes, car clutches and ceramic plates in bulletproof vests.

Electronic applications of silicon carbide such as light-emitting diodes (LEDs) and detectors in early radios were first demonstrated around 1907.

SiC is used in semiconductor electronics devices that operate at high temperatures or high voltages, or both.

Large single crystals of silicon carbide can be grown by the Lely method; they can be cut into gems known as synthetic moissanite.

Silicon carbide with high surface area can be produced from SiO2 contained in plant material.