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W. Rae Young in 2006. William Rae Young, Jr. (October 30, 1915 – March 7, 2008) was one of the Bell Labs engineers that invented the cell phone. The history of cellular phone technology began on December 11, 1947 with a Bell Labs internal memo written by Douglas H. Ring describing the idea of Rae Young of the hexagonal cell concept for a cellular mobile telephone system.
A compound semiconductor is a semiconductor compound composed of chemical elements of at least two different species. These semiconductors form for example in periodic table groups 13–15 (old groups III–V), for example of elements from the Boron group (old group III, boron, aluminium, gallium, indium) and from group 15 (old group V, nitrogen, phosphorus, arsenic, antimony, bismuth).
Scrapped mobile phones. Mobile phone recycling describes the waste management of mobile phones, to retrieve materials used in their manufacture. Rapid technology change, low initial cost, and planned obsolescence have resulted in a fast-growing surplus, which contributes to the increasing amount of electronic waste around the globe.
A copper indium gallium selenide solar cell (or CIGS cell, sometimes CI(G)S or CIS cell) is a thin-film solar cell used to convert sunlight into electric power. It is manufactured by depositing a thin layer of copper indium gallium selenide solid solution on glass or plastic backing, along with electrodes on the front and back to collect current.
John Francis Mitchell (January 1, 1928 – June 9, 2009) was an American electronics engineer and president and chief operating officer of Motorola. [3] [4]Mitchell led the pioneering development and implementation of Motorola's mobile phone technology producing the first portable transistorized pager and cell phone.
Midsummer AB [2] (Swedish manufacturer of CIGS solar modules and sputtering equipment for thin-film solar cells) Sunflare [3] Sunplugged [4] Solar Cloth [5] Former companies or companies that no longer produce CIGS modules: IBM; International Solar Electric Technology; Flisom (founded in 2005 as a spin-off company of ETH Zürich, Switzerland)
Lindsay added, “So they have the ‘alpha’ which is the most successful, the best looking and then they have ‘sigma’ which is the same thing as an alpha but humbler.”
The primary application of monocrystalline silicon is in the production of discrete components and integrated circuits.Ingots made by the Czochralski method are sliced into wafers about 0.75 mm thick and polished to obtain a regular, flat substrate, onto which microelectronic devices are built through various microfabrication processes, such as doping or ion implantation, etching, deposition ...