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.
Isothermal aging effects on lead-free solders have been extensively investigated in recent studies. Researches show that aging effects significantly degrade the mechanical properties of lead-free solders. However, limited work has been done on the effects of aging on the board-level dynamic performance of lead-free solder joints, especially for large flip-chip ball grid array (FCBGA) packages. Due...
The intermetallic growth in the Sn-Ag-Cu (SAC) solder joints fabricated on Cu or Cu-Zn solder wetting layer and its effect on the drop impact reliability have been studied. The drop test specimens were fabricated by connecting two printed circuit boards by reflowing SASC 405 solder balls on Cu or Cu-Zn wetting layers. And the drop test specimens were aged at 150degC up to 500 hrs. The well known bi-layer...
Cu pillar bump with eutectic SnPb was annealed and the micro structures were observed by scanning electron microscopy. Both of Cu6Sn5 and Cu3Sn grew following parabolic rate law at 120 and 150degC. At 165degC, Cu6Sn5 growth was stagnated while Cu3Sn growth rate was increased after 160 hour when all Sn was consumed. Kirkendall void was formed because of different diffusivities of Cu and Sn. The activation...
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.