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For Wire Bonding (Ball Bonding)
Yincae’s SMT 158 Capillary Underfill is a combination of capillary flow and no-flow underfills, rapid curing, fast flowing and easy reworking liquid epoxy that can be used as an underfill for chip scale packages, ball grid array devices, PoP (package
Electronics Forum | Tue Jan 31 13:55:56 EST 2006 | samir
Anyone know what the general rules / requirements are for micro-BGA's and CSP's as to when capillary underfill is required? (ie size of bump/ball, package thickness, PCB/CSP thickness ratios, etc).
Electronics Forum | Tue Sep 25 14:08:59 EDT 2001 | davef
Oooo, the solder on the pad and PGA ball is flowing during reflow down the via to the secondary side? Why didn�t you say so?? ;-) Why would you expect that gravity and capillary action wouldn�t force solder to flow down the solder plated via to the
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The miniaturization of microchips is always driving force for revolution and innovation in the electronic industry. When the pitch of bumps is getting smaller and smaller the ball size has to be gradually reduced. However, the reliability of smaller ball size is getting weaker and weaker, so some traditional methods such as capillary underfilling, corner bonding and edge bonding process have been being implemented in board level assembly process to enhance drop and thermal cycling performance. These traditional processes have been increasingly considered to be bottleneck for further miniaturization because the completion of these processes demands more space. So the interest of eliminating these processes has been increased. To meet this demand, YINCAE has developed solder joint encapsulant adhesives for ball bumping applications to enhance solder joint strength resulting in improving drop and thermal cycling performance to eliminate underfilling, edge bonding or corner bonding process in the board level assembly process. In this paper we will discuss the ball bumping process, the reliability such as strength of solder joints, drop test performance and thermal cycling performance.
SMTnet Express, April 5, 2018, Subscribers: 30,982, Companies: 10,916, Users: 24,587 High Reliability and High Throughput Ball Bumping Process Solution – Solder Joint Encapsulant Adhesives Dr. Mary Liu and Dr. Wusheng Yin; YINCAE Advanced
ASYMTEK Products | Nordson Electronics Solutions | https://www.nordson.com/en/divisions/asymtek/your-process/fluid-types/underfill
(two unlike materials). In capillary underfill applications, a precise volume of underfill material is dispensed along the side of a chip or package to flow underneath through capillary action, filling air gaps around
GPD Global | https://www.gpd-global.com/fluiddispense-prod-ncm5000.php
. An uneven surface does not impact the process. Process rates up to 50,000 DPH can be achieved. Jetting on uneven surface. Easy Setup & Cleaning Consisting of only 3 primary parts, the NCM5000 jetting pump has a main body, a flexible diaphragm with ball, and a nozzle plate, all of which are easy to install, disassemble, and clean
