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Recently, three dimensional integration circuits technology has received much attention since the demands of functionality and performance in microelectronic packaging for electronic products are rapidly increasing. For high-performance 3D chip stacking, high density interconnections are required. In the current types of interconnects, solder micro bumps have been widely adopted. For fine pitch solder...
New solder anisotropic conductive films (ACFs) consist of a thermosetting polymer resin and fine solder balls instead of the conventional metal particles or metal-coated polymer particles. These solder balls have lower melting temperature than conventional metal conductive particles, which enable them to be melted during ultrasonic (US) bonding, and form intermetallic alloy joints with metal pads...
The reliability of BGA assembly packages were evaluated by rapid fatigue life test. Three-point bend fatigue life test method has been developed for Sn-Ag-Cu 305 and rare-earth addition Sn-Ag-Cu-Ce solder joints. In this study, BGA assembly with Ni/Au surface finish was tested under cyclic bending load at room temperature. The bending fatigue life of Sn-Ag-Cu 305 solder joint was compared with rare-earth...
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