The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper, by using the synchrotron radiation real-time imaging, the growth of gas bubbles on solid-liquid interface during the soldering process was investigated. It was proved that the formation and growth of the bubbles was a process of heterogeneous nucleation. During the soldering heating insulation stage, the bubbles volume increased first and remained unchanged afterwards. When there were...
After many experiments in developing fluxless Ag-In joints, we realize that the success of producing a joint relates to microstructure of the Ag layer. Ag with small grains results in rapid growth of solid Ag2In intermetallic compounds through grain boundary diffusion. Thus, a joint is not obtained because of lack of molten phase, (L). To coarsen Ag grains, an annealing step is added to the Ag-plated...
A fluxless bonding process is successfully developed between silicon (Si) chips and copper (Cu) substrates using the silver-indium (Ag-In) binary system. This is a new design concept that utilizes thick Ag plated over the Cu substrate to deal with the large mismatch in coefficient of thermal expansion between semiconductors, such as Si (3 ppm/°C) and Cu (17 ppm/°C). The Ag layer actually becomes a...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.