Technical Library | 2024-06-19 13:59:50.0
The solderability of a nickel-palladium-gold (Ni-Pd-Au) finish on a Cu substrate was evaluated for the Pb-free solder, 95.5Sn-3.9Ag-0.6 Cu (wt.%, abbreviated Sn-Ag-Cu) and the eutectic 63Sn-37 Pb (Sn-Pb) alloy. The solder temperature was 245ºC. The flux was a rosin-based mildly activated (RMA) solution. The Ni-Pd-Au finish was tested in the as-fabricated condition as well as after exposure to one of the following accelerated storage (shelf life) regiments:
Technical Library | 2013-01-17 15:37:21.0
A problem exists with electroless nickel / immersion gold (ENIG) surface finish on some pads, on some boards, that causes the solder joint to separate from the nickel surface, causing an open. The solder has wet and dissolved the gold. A weak tin to nickel intermetallic bond initially occurs, but the intermetallic bond cracks and separates when put under stress. Since the electroless nickel / immersion gold finish performs satisfactory in most applications, there had to be some area within the current chemistry process window that was satisfactory. The problem has been described as a 'BGA Black Pad Problem' or by HP as an 'Interfacial Fracture of BGA Packages…'[1]. A 24 variable experiment using three different chemistries was conducted during the ITRI (Interconnect Technology Research Institute) ENIG Project, Round 1, to investigate what process parameters of the chemical matrix were potentially satisfactory to use and which process parameters of the chemical matrix need to be avoided. The ITRI ENIG Project has completed Round 1 of testing and is now in the process of Round 2 TV (Test Vehicle) build.
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Nihon has been a leader in soldering and brazing since 1966. Nihon manufactures SMT solder joining materials e.g. lead-free solder (SN100C:Sn-Cu-Ni-Ge etc): solder paste, solder spheres, flux cored solder wire, solder bar, etc.
ALPHA® TETRABOND™ is the culmination of "frameless" stencil development; an elegantly simple system designed to enhance the rigidity of the foil, making safe mounting and demounting an easier proposition. Innovatively encompassed in a thin, one piece
New Equipment | Fabrication Services
6 Layer Rigid-Flex PCB Material: FR-4(KB)+Polyimide(DuPont) No of layer: 6 Layer Board thickness: 1.6mm Copper thickness: 35um/1oz Surface finishing: ENIG, gold 0.05-0.1um, Nickel 3-5um Solder mask: Matt Green Other technology: FR-4 Stiffner
Industry News | 2014-08-28 11:46:07.0
Nihon Superior Co. Ltd. announces that Keith Sweatman will present the paper titled ”Enhancing the Impact Properties of Tin-Copper and Tin-Copper-Nickel Lead-Free Solders with Trace Additions of Zinc, Indium and Gold” at the upcoming SMTA International exhibition.
New Equipment | Test Equipment
Printed Circuit Boards(PCBs) are used to electrically connect electronic components using conductive pathways, traces, etched from copper sheets laminated onto a non-conductive substrate. Our manufacturing processes utilise the latest techniques an
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AGI is an Internationally known supplier of PCB Assembly Tooling. AGI manufactures wave solder pallets, SMT Fixtures, Kitting Carts and etc... for PCB Assembly. Let us help you with your tooling need
New Equipment | Surface Finish
Technic supplies precious metal and tin and tin alloyed products that are used to preserve as well as enhance soldering and bonding through all levels of interconnection. Technic is well established as a leader in Final Finish Solutions for printed
RCX Series Resistors Versatile Wrap-Around Chip With resistance values from 1ohm to 1Teraohm, RCX Series resistors are ideal for a wide variety of applications. Wraparound terminations are perfect for epoxy or solder attachmen
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