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About Emerald www.emeraldinsight.comEmerald is a global publisher linking research and practice to the benefit of society. The company manages a portfolio of more than 290 journals and over 2,350 books and book series volumes, as well as providing an extensive range of online products and additional customer resources and services.Emerald is both COUNTER 4 and TRANSFER compliant. The organization is a partner of the Committee on Publication Ethics (COPE) and also works with Portico and the LOCKSS initiative for digital archive preservation.ABSTRACT -A case study was conducted to investigate the issues associated with the design and procurement of flip chip test die and corresponding organic substrates. Test wafers were fabricated by an IC supplier and bumped with electroplated eutectic Sn/Pb by a third party. Issues associated with transferring integrated circuit data to printed circuit design software were identified. The bare and bumped wafers were characterised to identify possible criteria for lot qualification.
Sato : Differential Dilatometric Study on the Hydrogen-Shortness of Copper. Notwithstanding their security in vacuum, some specimens of cast copper, as is generally known, change their attributes in hydrogen atomosphere by heating, due to the so-called " Hydrogen-Shortness" : i. e., when these specimens are heated in hydrogen atomosphere, the broadening of each grain boundary can been observed to take place, together with the formation of conspicuous cracks at this boundary. To study the phenomena above stated, the present writers examined the differential dilatation of each specimen during the procedure of heating. As the consequence of this examination, the abnormal dilatation of the specimens was found to occur about 650° the ;more remarkably, the more the amount of copper oxide contained in these specimens was increased. Especially, it was noticed that such a dilatation could never be detected, with deoxidated specimen free from copper oxide. Thus, this abnormal dilatation, which may be intimately associated with the aforesaid "Hydrogen-Shortness", is conceived to be due to the reduction of copper oxide by hydrogen.
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