Electronics & Semiconductors

US firms have only few days supply of semiconductors: govt

American companies have an average of less than five days worth of semiconductors on hand, a level leaving them vulnerable to production shutdowns if supply is disrupted, the Commerce Department said Tuesday.

Business

Addressing the microchip shortage

The U.S. semiconductor chip shortage is likely to continue well into 2022, and a Georgia Tech expert predicts that the U.S. will need to make major changes to the manufacturing and supply chain of these all-important chips ...

Electronics & Semiconductors

Taiwan chipmaker TSMC says quarterly profit $6 billion

Taiwan Semiconductor Manufacturing Co., the biggest contract manufacturer of processor chips, reported Thursday its quarterly profit rose 16.4% over a year earlier to $6 billion amid surging demand for chips for smartphones ...

Electronics & Semiconductors

Rapid preparation of CdSe thin-film solar cells

The silicon-based tandem solar cell is regarded as the most promising strategy to break the theoretical efficiency limit of single-junction Si solar cells. With Si-based tandem solar cells as the bottom cells, the optimal ...

Engineering

Semiconductors reach the quantum world

Quantum effects in superconductors could give semiconductor technology a new twist. Researchers at the Paul Scherrer Institute PSI and Cornell University in New York State have identified a composite material that could integrate ...

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Semiconductor

A semiconductor is a material that has a resistivity value between that of a conductor and an insulator. The conductivity of a semiconductor material can be varied under an external electrical field. Devices made from semiconductor materials are the foundation of modern electronics, including radio, computers, telephones, and many other devices. Semiconductor devices include the transistor, solar cells, many kinds of diodes including the light-emitting diode, the silicon controlled rectifier, and digital and analog integrated circuits. Solar photovoltaic panels are large semiconductor devices that directly convert light energy into electrical energy. In a metallic conductor, current is carried by the flow of electrons. In semiconductors, current can be carried either by the flow of electrons or by the flow of positively-charged "holes" in the electron structure of the material.

Silicon is used to create most semiconductors commercially. Dozens of other materials are used, including germanium, gallium arsenide, and silicon carbide. A pure semiconductor is often called an “intrinsic” semiconductor. The conductivity, or ability to conduct, of semiconductor material can be drastically changed by adding other elements, called “impurities” to the melted intrinsic material and then allowing the melt to solidify into a new and different crystal. This process is called "doping".

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