Industry News | 2011-10-16 00:20:48.0
Nihon Superior announces that Keith Sweatman will present a paper titled “The Effect of Microalloy Additions on the Morphology and Growth of Interfacial Intermetallic in Low-Ag and No-Ag Pb-Free Solders” at the upcoming SMTA International 2011.
Technical Library | 2013-08-29 19:52:43.0
Au over Ni on Cu is a widely used printed circuit board (PCB) surface finish, under bump metallization (UBM), and component lead metallization. It is generally accepted that less than 3 wt.% Au in Sn-Pb solder joints inhibits formation of detrimental intermetallic compounds (IMC). However, the critical limit for Au content in Pb-free solder joints is not well established. Three surface-mount package platforms, one with a matte Sn surface finish and the others with Ni/Au finish, were soldered to Ni/Au-finished PCB using Sn-3.0Ag 0.5Cu (SAC305) solder, in a realistic manufacturing setting. The assembled boards were divided into three groups: one without any thermal treatment, one subjected to isothermal aging at 125°C for 30 days, and the third group aged at 125°C for 56 days...
Industry News | 2011-12-14 15:03:10.0
Nihon Superior will showcase a new and expanded range of products based on its SN100C® silver-free, lead-free solder in booth East 30-13 at the upcoming Internepcon Japan exhibition. SN100C now has a track record of more than 12 years of successful delivery of high productivity and high reliability.
New Equipment | Solder Materials
Superior Drop Shock Performance AND Thermal Cycling Reliability Current Industry Dilemma The standard set of Pb-free alloys has a dramatic trade-off between thermal cycling and drop testing. Additionally, all these SAC alloys are far inferior to
New Equipment | Solder Materials
Solves: QFN Voiding | Head-in-Pillow | Graping Indium8.9 is an air or nitrogen reflow, no-clean solder paste specifically formulated to accommodate the higher processing temperatures required by the SnAgCu, SnAg, and other alloy systems favored by t
Industry News | 2011-01-14 13:06:07.0
Nihon Superior Co. Ltd. will exhibit in Booth # East 30-14 at the upcoming INTERNEPCON JAPAN, scheduled to take place January 19-21, 2011 at the Tokyo Big Sight in Tokyo, Japan.
Industry News | 2012-03-28 15:59:44.0
Nihon Superior Shanghai Co. Ltd., a subsidiary of Nihon Superior Co. Ltd. will showcase a new and expanded range of products based on its SN100C® silver-free, lead-free solder at the upcoming NEPCON China 2012 exhibition in Shanghai.
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 | 2014-11-06 16:43:24.0
This paper summarizes the results of recent investigations to examine the effect of electroless nickel process variations with respect to Pb-free (Sn-3.0Ag-0.5Cu) solder connections. These investigations included both ENIG and NiPd as surface finishes intended for second level interconnects in BGA applications. Process variations that are suspected to weaken solder joint reliability, including treatment time and pH, were used to achieve differences in nickel layer composition. Immersion gold deposits were also varied, but were directly dependent upon the plated nickel characteristics. In contrast to gold, different electroless palladium thicknesses were independently achieved by treatment time adjustments.
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