Industry News | 2021-02-12 16:08:40.0
Nihon Superior Co. Ltd is pleased to announce thatit will exhibit its newly developed TempSave series during the 2021 IPC APEX Virtual EXPO, scheduled to take place March 9-11, 2021 online at www.ipcapexexpo.org. The company also will showcase its NozzleSave alloyalong with SN100CV P608 and LF-C2 P608 solder pastes.
Industry News | 2021-10-07 15:29:25.0
Nihon Superior Co. Ltd. is pleased to announce that it will exhibit its TempSave series in Booth #3301 at the SMTA International Exposition, scheduled to take place Nov. 3-4, 2021 at the Minneapolis Convention Center in Minneapolis, MN. The company also will showcase SN100CV P608 solder paste.
Industry News | 2022-01-03 07:24:21.0
Nihon Superior Co. Ltd. is pleased to announce that it will exhibit its newly developed TempSave series during the 2022 IPC APEX Virtual EXPO, scheduled to take place Jan. 25-27, 2022 at the San Diego Convention Center, San Diego, CA. The company also will showcase its TipSave N alloy along with SN100CV P608 and LF-C2 P608 solder pastes.
Industry News | 2022-10-06 18:19:54.0
Nihon Superior Co. Ltd. is pleased to announce that it will exhibit its TempSave series in Booth #1230 at the SMTA International Exposition, scheduled to take place Nov. 2-3, 2022 at the Minneapolis Convention Center in Minneapolis, MN. The company also will showcase SN100CV P608 solder paste.
Industry News | 2022-12-21 10:42:04.0
Nihon Superior Co. Ltd. is pleased to announce that it will exhibit its TempSave series in Booth #1433 at the IPC APEX Exposition, scheduled to take place Jan. 24-26, 2023 at the San Diego Convention Center in San Diego, CA. The company also will showcase LF-C2 P608 solder paste.
Technical Library | 2018-05-17 11:14:52.0
Intermetallic compound (IMC) growth is being studied in earnest in this past decade because of its significant effect the solder joint reliability. It appears that from numerous investigations conducted, excessive growth of IMC could lead to solder joint failure. Leading to this, many attempts has been made to determine the actual IMC thickness. However, precise and true representation of the growth in the actual 3D phenomenon from 2D cross-section investigations has remained unclear. This paper will focus on the measuring the IMC thickness using 3D surface profilometer (Alicona Focus G4). Lead free solder, Sn3.0Ag0.5Cu (SAC305) was soldered onto copper printed circuit board (Cu PCB). The samples were then subjected to thermal cycle (TC) storage process with temperature range from 0 °C to 100 °C for 200 cycles and up to 1000 cycles were completed.
Technical Library | 2020-10-27 02:02:17.0
Solder powder size is a popular topic in the electronics industry due to the continuing trend of miniaturization of electronics. The question commonly asked is "when should we switch from Type 3 to a smaller solder powder?" Solder powder size is usually chosen based on the printing requirements for the solder paste. It is common practice to use IPC Type 4 or 5 solder powders for stencil designs that include area ratios below the recommended IPC limit of 0.66. The effects of solder powder size on printability of solder paste have been well documented. The size of the solder powder affects the performance of the solder paste in other ways. Shelf life, stencil life, reflow performance, voiding behavior, and reactivity / stability are all affected by solder powder size. Testing was conducted to measure each of these solder paste performance attributes for IPC Type 3, Type 4, Type 5 and Type 6 SAC305 solder powders in both water soluble and no clean solder pastes. The performance data for each size of solder powder in each solder paste flux was quantified and summarized. Guidance for choosing the optimal size of solder powder is given based on the results of this study.
Technical Library | 2022-10-31 17:25:37.0
Mixed formulation solder alloys refer to specific combinations of Sn-37Pb and SAC305 (96.5Sn–3.0Ag–0.5Cu). They present a solution for the interim period before Pb-free electronic assemblies are universally accepted. In this work, the surfaces of mixed formulation solder alloys have been studied by in situ and real-time Auger electron spectroscopy as a function of temperature as the alloys are raised above the melting point. With increasing temperature, there is a growing fraction of low-level, bulk contaminants that segregate to the alloy surfaces. In particular, the amount of surface C is nearly _50–60 at. % C at the melting point. The segregating impurities inhibit solderability by providing a blocking layer to reaction between the alloy and substrate. A similar phenomenon has been observed over a wide range of (SAC and non-SAC) alloys synthesized by a variety of techniques. That solder alloy surfaces at melting have a radically different composition from the bulk uncovers a key variable that helps to explain the wide variability in contact angles reported in previous studies of wetting and adhesion. VC 2011 American Vacuum Society. [DOI: 10.1116/1.3584821]
Technical Library | 2022-12-05 16:28:06.0
The work evaluates the impact of latent heat (LH) absorbed or released by a solder alloy during melting or solidification, respectively, on changes of dimensions of materials surrounding of the solder alloy. Our sample comprises a small printed circuit board (PCB) with a blind via filled with lead-free alloy SAC305. Differential scanning calorimetry (DSC) was employed to obtain the amount of LH per mass and a thermomechanical analyzer was used to measure the thermally induced deformation. A plateau during melting and a peak during solidification were detected during the course of dimension change. The peak height reached 1.6 μm in the place of the heat source and 0.3 μm in the distance of 3 mm from the source. The data measured during solidification was compared to a numerical model based on the finite element method. An excellent quantitative agreement was observed which confirms that the transient expansion of PCB during cooling can be explained by the release of LH from the solder alloy during solidification. Our results have important implications for the design of PCB assemblies where the contribution of recalescence to thermal stress can lead to solder joint failure.
Industry News | 2009-04-13 16:28:45.0
ITASCA, IL � April 2009 � Kester's Peter Biocca, along with Carlos Rivas of SMT Dynamics, will present a paper titled, �Case Study on the Validation of SAC305 and SnCu Based Solders in SMT, Wave and Hand-soldering at the Contract Assembler Level,� at the upcoming 13th Annual Atlanta Expo scheduled to take place at 1 p.m. on Thursday, April 16, 2009 at the Gwinnett Civic Center in Duluth, GA.
