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)
Industry News | 2020-03-19 13:12:42.0
The SMTA is pleased to announce the Best Papers from SMTA International 2019. As speakers at SMTA International, individuals make contributions to the industry by sharing their research and findings. For these exceptional achievements, a cash award and plaque are given to primary authors of all winning papers.
Industry News | 2011-01-20 13:45:14.0
IPC will introduce a cyber conference at IPC APEX EXPO in Las Vegas in 2011. The IPC APEX EXPO Cyber Conference will feature live broadcasts and post-show archives of seven of the show's thirty-five technical conference sessions on April 12–14, 2011.
Parts & Supplies | Assembly Accessories
CM101/CM202/CM20F/CM212/CM301/CM401/CM402/CM602/DT401 1.PanasonicCM402Spareparts Z-AXISbelt,NewPartNumber:N510030309AA,OldPartNumber:KXF0DWVHA00 Q-AXISbelt,NewPartNumber:N510030308AA KXFODKCAA00 KXFODKDAA00 KXFODKEAA00 KXFODKFAA00 KXFODKGAA00
New Equipment | Solder Materials
We manufacture both solder preforms and pad repair kits. Our geometries are available starting at 25um and up in SnAg, SnPb, Cu and Au, Ag and other finishes.
Technical Library | 2013-10-17 17:46:01.0
Although several commercial and experimental Pb-free solder alloys are available as replacements for Sn-Pb solders, the following families of solders are of particular interest and are the prevailing choices of industry: eutectic Sn-Ag, eutectic Sn-Cu, eutectic Sn-Zn, eutectic Bi-Sn, and Sn–In. Since the properties of the binary Pb-free solders cannot fully meet the requirements for applications in electronic packaging, additional alloying elements are added to improve the performance of these alloys. Thus, ternary and even quaternary Pb-free solders have been developed, such as Sn-Ag-Cu, Sn-Ag-Bi, and Sn-Zn-Bi solder...
New Equipment | Solder Materials
AMTECH’s Premium Bar Solder is designed to meet today’s sophisticated electronic manufacturing processes by providing a strong and reliable solder joint. All AMTECH bar solder is manufactured from a variety of high purity virgin metals that exceed th
New Equipment | Solder Materials
New Precision BGA Spheres Optimize Sphere Performance Indium Corporation’s Solder Spheres for PBGA, CBGA, TBGA, µBGA¬ and Flip Chip applications are made by a proprietary manufacturing process that consistently results in high sphericity and accura
Technical Library | 2022-10-31 17:09:04.0
The global transition to lead-free (Pb-free) electronics has led component and equipment manufacturers to transform their tin–lead (SnPb) processes to Pb-free. At the same time, Pb-free legislation has granted exemptions for some products whose applications require high long-term reliability. However, due to a reduction in the availability of SnPb components, compatibility concerns can arise if Pb-free components have to be utilized in a SnPb assembly. This compatibility situation of attaching a Pb-free component in a SnPb assembly is generally termed "backward compatibility." This paper presents the results of microstructural analysis of mixed solder joints which are formed by attaching Pb-free solder balls (SnAgCu) of a ball-grid-array component using SnPb paste. The experiment evaluates the Pb phase coarsening in bulk solder microstructure and the study of intermetallic compounds formed at the interface between the solder and the copper pad.
Used SMT Equipment | Soldering - Wave
The following Ersa N-Wave 330 has 2 full solder pots and various spares. It is included in the Manroland Online Auction scheduled for August 27-28 on www.xlineassets.com. This system will be sold to the highest bidder and is current just decommission
