Technical Library | 2023-01-17 17:27:13.0
Reflow profile has significant impact on solder joint performance because it influences wetting and microstructure of the solder joint. The degree of wetting, the microstructure (in particular the intermetallic layer), and the inherent strength of the solder all factor into the reliability of the solder joint. This paper presents experimental results on the effect of reflow profile on both 63%Sn 37%Pb (SnPb) and 96.5%Sn 3.0%Ag 0.5%Cu (SAC 305) solder joint shear force. Specifically, the effect of the reflow peak temperature and time above solder liquidus temperature are studied. Nine reflow profiles for SAC 305 and nine reflow profiles for SnPb have been developed with three levels of peak temperature (230 o C, 240 o C, and 250 o C for SAC 305; and 195 o C, 205 o C, and 215 o C for SnPb) and three levels of time above solder liquidus temperature (30 sec., 60 sec., and 90 sec.). The shear force data of four different sizes of chip resistors (1206, 0805, 0603, and 0402) are compared across the different profiles. The shear force of the resistors is measured at time 0 (right after assembly). The fracture surfaces have been studied using a scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS)
Technical Library | 2023-01-17 17:19:44.0
A test program was developed to evaluate the effectiveness of vacuum reflow processing on solder joint voiding and subsequent thermal cycling performance. Area array package test vehicles were assembled using conventional reflow processing and a solder paste that generated substantial void content in the solder joints. Half of the population of test vehicles then were re-processed (reflowed) using vacuum reflow. Transmission x-ray inspection showed a significant reduction in solder voiding after vacuum processing. The solder attachment reliability of the conventional and vacuum reflowed test vehicles was characterized and compared using two different accelerated thermal cycling profiles. The thermal cycling results are discussed in terms of the general impact of voiding on solder thermal fatigue reliability, results from the open literature, and the evolving industry standards for solder voiding. Recommendations are made for further work based on other void reduction methods and additional reliability studies.
Industry News | 2016-06-27 14:59:09.0
GPD Global introduces the NEW TempView Thermal Imaging System that ensures the success of heated dispensing processes like Underfill, Encapsulations, Dam and Fill, and more. The TempView Thermal Imaging System monitors the temperature of the entire substrate for complete heat profile characterization. Regions of the product may be selected for monitoring during the heating process. Now you can accurately monitor temperature of specific devices to be sure they are up to temperature before starting a process.
Parts & Supplies | Assembly Accessories
Part Name: KIC Explorer Model: KIC Explorer Brand: KIC Accuracy: +/-0.5 Deg.C Temperature Range: Can Up To 350-400 Deg.C Size: 320*86*26（mm） SMT thermal profiler KIC explorer,Reflow oven checker kic profiler KIC Explorer * Replacement for KIC
Used SMT Equipment | Soldering - Reflow
The 1800 reflow oven models support high mix / high volume throughput… at speeds up to 32 inches (80 centimeters) per minute, while conserving valuable factory floor space. Rapid response times and precise temperature controls assure process uniformi
Parts & Supplies | Pick and Place/Feeders
label feeder for Yamaha YV,YS,SMT label feeder for logo Continuous work 72 hours without exception We have full range of SMT pick and place machine feeders, for FUJI,JUKI,SAMSUNG,YAMAHA,PANASONIC and so on,including pneumatic feeder,electric feed
Parts & Supplies | Assembly Accessories
Detailed Product Description Part Name: Stick Feeder Type: SM Type Power Supply: 24V Material: Aluminium Profile Weight: 6KG Application: All SM Model Samsung SM Stick Feeder 24V Power Supply High Quanlity SMT Vibration Feeder Detail Informat
Used SMT Equipment | Soldering - Reflow
Production Overview: The 1700 reflow soldering oven models support high mix / medium volume throughput… at speeds up to 24 inches (60 centimeters) per minute, while conserving valuable factory floor space. Rapid response times and precis
Technical Library | 2019-05-24 09:22:59.0
There is a smaller process window and a much narrower margin of error when creating and using lead-free reflow profiles for surface mount parts on printed circuit boards (PCBs). Solder balls, dewetting, tombstones, voids, and head-on-pillow problems will occur much more frequently because lead-free alloys behave differently than eutectic pastes. Problems are compounded due to the extra heat necessary for some lead-free pastes to reach their melting points.
Training Courses | | | PCB Rework and Hand Soldering Courses
The PCB rework and hand soldering courses courses cover techniques of rework and repair of PCBs, BGAs and other electronics assemblies, and teach fundamentals of soldering of electronics assemblies.
