Industry Directory | Manufacturer
Shenzhen Huancheng Automation equipment Co.,ltd (referred to as the "HC"), a High-speed developing enterprise specializing in High Precision Automatic Solder Paste Printer research and development.
Technical Library | 2020-10-27 02:07:31.0
For companies that choose to take the Pb-free exemption under the European Union's RoHS Directive and continue to manufacture tin-lead (Sn-Pb) electronic products, there is a growing concern about the lack of Sn-Pb ball grid array (BGA) components. Many companies are compelled to use the Pb-free Sn-Ag-Cu (SAC) BGA components in a Sn-Pb process, for which the assembly process and solder joint reliability have not yet been fully characterized. A careful experimental investigation was undertaken to evaluate the reliability of solder joints of SAC BGA components formed using Sn-Pb solder paste. This evaluation specifically looked at the impact of package size, solder ball volume, printed circuit board (PCB) surface finish, time above liquidus and peak temperature on reliability. Four different BGA package sizes (ranging from 8 to 45 mm2) were selected with ball-to-ball pitch size ranging from 0.5mm to 1.27mm. Two different PCB finishes were used: electroless nickel immersion gold (ENIG) and organic solderability preservative (OSP) on copper. Four different profiles were developed with the maximum peak temperatures of 210oC and 215oC and time above liquidus ranging from 60 to 120 seconds using Sn-Pb paste. One profile was generated for a lead-free control. A total of 60 boards were assembled. Some of the boards were subjected to an as assembled analysis while others were subjected to an accelerated thermal cycling (ATC) test in the temperature range of -40oC to 125oC for a maximum of 3500 cycles in accordance with IPC 9701A standard. Weibull plots were created and failure analysis performed. Analysis of as-assembled solder joints revealed that for a time above liquidus of 120 seconds and below, the degree of mixing between the BGA SAC ball alloy and the Sn-Pb solder paste was less than 100 percent for packages with a ball pitch of 0.8mm or greater. Depending on package size, the peak reflow temperature was observed to have a significant impact on the solder joint microstructural homogeneity. The influence of reflow process parameters on solder joint reliability was clearly manifested in the Weibull plots. This paper provides a discussion of the impact of various profiles' characteristics on the extent of mixing between SAC and Sn-Pb solder alloys and the associated thermal cyclic fatigue performance.
Industry Directory | Distributor / Manufacturer / Manufacturer's Representative / Standards Setting / Certification / Training Provider
PB Technik supplies SMT equipment and materials to the Polish market. JUKI ERSA EKRA BRADY MARANTZ
Industry News | 2009-03-27 10:06:36.0
San Diego � March 2009 � KIC, the leader of thermal process development and control products, and winner of multiple industry awards, announces that it will feature KIC's new RPI, Reflow Process Inspection.
Industry News | 2009-01-30 16:42:42.0
San Diego � January 2009 � KIC, the leader of thermal process development and control products, and winner of multiple industry awards, announces that it will feature KIC's new RPI, Reflow Process Inspection. KIC also will be showing the KIC Explorer Dual model that may be used as a datalogger or as a real-time profiler using radio frequency technology. KIC will be in representative Mectronics Marketing Services' booth, located in Hall #18 in booth #406, at the Componex/Nepcon India 2009, scheduled to take place February 24-26, 2009 in New Delhi.
New Equipment | Rework & Repair Equipment
FINEPLACER® pico rs is an enhanced hot air rework station for assembly and rework of all types of SMD components. The system is a best seller for professional mobile device rework in high density environments. A high level of process modularity allo
New Equipment | Selective Soldering
The L-CAT NEO can be designed for either a stand alone or in-line soldering process. This next generation soldering robot will communicate with computer and smart devices for easy management. This is the next generation robot which has all the funct
Industry Directory | Consultant / Service Provider / Manufacturer
Contract manufacturer, complete service for assembled boards.
K2 Profile Setter with Mobile Viewer App A compact and robust profiler with apps for viewing profile data on Android and Apple devices.
Industry News | 2011-05-10 19:11:40.0
MARTIN will showcase its Mini-Oven 04 Reball/Prebump unit at the upcoming Space Coast Expo and Tech Forum, scheduled to take place June 9, 2011 at the Melbourne Auditorium in Melbourne, FL.
