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Scrap Silicon Wafer



Making Microchips: Policy, Globalization, and Economic Restructuring in the Semiconductor Industry by Jan Mazurek,

Making Microchips: Policy, Globalization, and Economic Restructuring in the Semiconductor Industry by Jan Mazurek,
In "Making Microchips, Jan Mazurek examines the environmental and economic implications of the computer microchip industry's exodus from California's Silicon Valley to New Mexico, Virginia, Ireland, and Taiwan. Globalization, economic restructuring, and changing manufacturing processes in this rapidly growing industry present difficult new questions for environmental policy. Mazurek challenges the assumptions of U.S. policies designed to promote the competitiveness of domestic microchip makers. She argues that, although these initiatives focus on the economic effects of environmental regulation, they fail to acknowledge how economic and organizational changes within the industry collide with and often confound efforts to monitor and manage pollution from chemicals used in microchip manufacturing.Despite its reputation as a clean industry, microchip manufacturing is fraught with hazards. More than sixty dangerous acids, solvents, caustics, and gases are used to make microchips, and some of them are suspected to be carcinogens and/or reproductive toxins. Mazurek describes the environmental by-products of chipmaking, including soil contamination, air and water pollution, and damage to human health. Applying insights from economic geography to questions of how and where companies organize production, she shows how Silicon Valley played a pivotal role in the development of the microchip. Pairing federal environmental data with structural and geographic information on the six firms that continue to build wafer fabrication plants in the United States, she demonstrates how reorganization and relocation of manufacturing facilities divert attention from trends in toxic emissions and how theycomplicate public and private efforts to improve the industry's environmental performance. In the concluding chapter, Mazurek marshals her findings in a broader analysis of the expansion of global manufacturing and the resultant environmental problems.
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Third Generation Photovoltaics: Advanced Solar Conversions
Third Generation Photovoltaics: Advanced Solar Conversions
Photovoltaics, the direct conversion of sunlight to electricity, is now the fastest growing technology for electricity generation. Present "first generation" products use the same silicon wafers as in microelectronics. "Second generation" thin-films, now entering the market, have the potential to greatly improve the economics by eliminating material costs. Martin Green, one of the worlds foremost photovoltaic researchers, argues in this book that "second generation" photovoltaics will eventually reach its own material cost constraints, engendering a "third generation" of high performance thin-films. The book explores, self-consistently, the energy conversion potential of advanced approaches for improving photovoltaic performance and outlines possible implementation paths.
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Silicon on sapphire - Silicon on sapphire (SOS) is a hetero-epitaxial process for integrated circuit manufacturing that consists of a thin layer of silicon grown on a sapphire (Al2O3) wafer. SOS is part of the Silicon on Insulator (SOI) family of CMOS technologies.

Wafer-scale integration - Wafer-scale integration, WSI for short, is a yet-unused system of building very-large integrated circuit networks that use an entire silicon wafer to produce a single "super-chip". Through a combination of large size and reduced packaging, WSI could lead to dramatically reduced costs for some systems, notably massively parallel supercomputers.

Wafer (electronics) - In microelectronics, a wafer is a thin slice of semiconducting material, such as a silicon crystal, upon which microcircuits are constructed by doping (for example, diffusion or ion implantation), etching, and deposition of various materials. Wafers are thus of key importance in the fabrication of semiconductor devices such as integrated circuits.

Stepper - A stepper is a device, similar to a slide projector or a photographic enlarger, that is used in photolithography to transfer patterns that will become part of an integrated circuit (IC) onto the surface of a silicon wafer. This is done by exposing photosensitive material on the wafer to light passing through a pattern on a transparent plate called a reticle.



scrapsiliconwafer

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