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Rock's law or Moore's second law, named for Arthur Rock or Gordon Moore, says that the cost of a semiconductor chip fabrication plant doubles every four years.〔"(FAQs )", ''India Electronics & Semiconductor Association''.〕 As of 2015, the price had already reached about 14 billion US dollars.〔http://www.tomshardware.com/news/samsung-14-billion-chip-plant,29058.html〕 Rock's law can be seen as the economic flip side to Moore's law; the latter is a direct consequence of the ongoing growth of the capital-intensive semiconductor industry—innovative and popular products mean more profits, meaning more capital available to invest in ever higher levels of large-scale integration, which in turn leads to creation of even more innovative products. The semiconductor industry has always been extremely capital-intensive, with ever-dropping manufacturing unit costs. Thus, the ultimate limits to growth of the industry will constrain the maximum amount of capital that can be invested in new products; at some point, Rock's Law will collide with Moore's Law.〔.〕〔.〕〔Tremblay, Jean-François (2006). (Riding On Flat Panels )", ''CEN.ACS.org''.〕 It has been suggested that fabrication plant costs have not increased as quickly as predicted by Rock's law – indeed plateauing in the late 1990s〔Ross, Philip E. (2003). "(5 Commandments )", ''Spectrum.IEEE.org''.〕 – and also that the fabrication plant cost ''per transistor'' (which has shown a pronounced downward trend〔) may be more relevant as a constraint on Moore's Law. ==See also== *Semiconductor device fabrication *Fabless manufacturing *Semiconductor consolidation 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Rock's law」の詳細全文を読む スポンサード リンク
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