New Equipment | Fabrication Services
Rigid flex printed circuit boards (PCBs) are manufactured by combining rigid and flexible board technologies. These circuit boards are made up of multiple flexible circuit inner layers. An epoxy pre-preg bonding film is used to attach together these
New Equipment | Assembly Services
PNC Inc. has been manufacturing hi-reliability printed circuit boards since 1968. All Military Spec PC boards are manufactured in the security of our Nutley NJ, USA facility. PNC is certified by the Department of Defense to Military Performance Speci
Electronics Forum | Mon Jan 03 16:34:10 EST 2005 | davef
The main advantage if ENIG over HASL is that ENIG is flat and HASL generally is not. The main disadvanages to ENIG over HASL are: * Cost of ENIG is 1.5 - 2X higher than HASL * Selflife is less than HASL * You solder to nickel, rather than copper * E
Electronics Forum | Tue Jan 04 12:37:41 EST 2005 | Cmiller
We have been using this finish almost exclusively for fine pitch boards for about 5 years. Make SURE you use a board house that does the gold plating in-house. There are some potential issues as DaveF stated. The only problem we have encountered is w
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.
Parts & Supplies | Circuit Board Assembly Products
1) 36*36mm/1up, Aluminium type: A5052 2) Thermal conductivity: 0.8-1.3 W/mk, 3) Single sided, 1.6mm 4) White solder mask/ Black Legend 5) Copper weight: 35μm 6) Surface Finish: ENIG 7) Profile: Punch
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 | 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.
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PCB Libraries, Inc. | https://www.pcblibraries.com/forum/ipc7093a-btc-qfn-solder-mask-defined-thermal-pad_topic2154_post11220.html
. Here is a CAD tool sample of a thermal pad with 4 vias: Green = Solder Mask Yellow = Solder Mask Opening Gray = Paste Mask Black Dots
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