Technical Library | 2013-01-17 15:34:33.0
The use of an electroless nickel, immersion gold (ENIG) surface finish comes with the inherent potential risk of Black Pad failures that can cause fracture embrittlement at the interface between the solder and the metal pad. As yet, there is no conclusive agreed solution to effectively eliminate Black Pad failures. The case studies presented are intended to add to the understanding of the Black Pad failure mechanism and to identify both the plating and the subsequent assembly processes and conditions that can help to prevent the likelihood of Black Pad occurring.
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.
Technical Library | 2023-01-06 16:09:03.0
The 4-14 IPC Standards Committee recently created a revision to the IPC4552 specification for Electroless Nickel/Immersion Gold (ENIG) finished Printed Circuit Boards (PCB). Revision A brings a more comprehensive evaluation of metal layer thicknesses measurement, composition and introduces, for the first time, a quality aspect for nickel corrosion which has been historically connected to a defect called black line nickel or black pad.
Events Calendar | Tue Jan 23 00:00:00 EST 2018 - Tue Jan 23 00:00:00 EST 2018 | New Milford, Connecticut USA
FREE Webinar: Eliminate Circuit Board Problems and Failure Modes
Industry News | 2012-01-03 10:40:18.0
Technic has announced the release of Technic EN AT5600, an electroless nickel developed specifically to eliminate black pad and to improve soldering on ENIG coated PCBs. Technic EN AT 5600 is the first electroless nickel that provides lateral growth on copper, yielding a flatter surface with less pronounced grain boundaries instead of the typical nodular, "cauliflower-like" structure from older formulas.
Industry News | 2018-11-27 14:03:14.0
Super PCB is pleased to announce that it offers a variety of quality PCB surface finishes. PCB surface finish is the coating between the PCB and components that provides a solderable surface for components and protects the exposed copper circuitry.
Industry News | 2018-01-16 11:59:10.0
Vision Engineering has teamed up with industry-expert Bob Willis to broadcast a free Electronics Academy Webinar aimed at identifying the issues affecting PCB/SMT assembly and the challenges of achieving Zero Defect Manufacture. The next webinar, Eliminate Printed Circuit Board Problems & Failure Modes will take place on January 23rd at 2:30 EST.
Industry News | 2011-08-19 05:08:40.0
Nickel gold is one of the most popular surface finishes used in the PCB assembly industry with many advantages but also process and reliability issues.
Used SMT Equipment | Pick and Place/Feeders
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Used SMT Equipment | THT Equipment
Spare parts for Universal Radial and Axial through-hole insertion machines Model specifications: (RAD5 6360D, RAD8 6380A, RAD8 XT 6380B, VCD5 6241D, VCD8 6241F, VCD Dual 6292A, SEQ 2596A, SEQ5, SEQ8). UIC Part Number / Part Description 15754 O
