Business

One more huge chip deal in 2020; AMD buys Xilinx for $35B

Advanced Micro Devices is buying Xilinx for $35 billion in an all-stock deal that will combine the two Silicon Valley chip makers and accelerate an already rapid-fire pace of mergers and buyouts in the industry.

US restricts technology sales to Chinese semiconductor giant

Washington has ordered US companies to seek permission before selling their technologies to Chinese semiconductor giant SMIC, its latest salvo in the battle for technological dominance over Beijing, the Wall Street Journal ...

Business

Chinese chipmaker denies military ties as US steps up feud

China's leading maker of semiconductors has denied it has any links to the military following reports Washington is considering stepping up its feud with Beijing over technology and security by imposing export controls that ...

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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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