New Equipment | Cable & Wire Harness Equipment
Overview The CableCoiler 1300 is a stand-alone, fully synchronized high performance cable coiler for cut and strip machines. It coils all types of round cable with a maximum outer diameter of 12 mm (0.47") in high quality. Coiling diameters from 11
New Equipment | Solder Materials
We have a wide variety of flux-Cored solder, a mix of metal alloy, flux and other elements, that we have put together to match every type of application. This formula is designed so that the incidence of bridging is rare; likew
If you are working with "legacy" data in a Gerber format, DownStream can "Reverse Engineer" it for you. Reverse engineering is the process of starting with Gerber files then adding part and netlist information, to create an intelligent database, whic
Technical Library | 2021-07-20 20:02:29.0
During the manufacturing of printed circuit boards (PCBs) for a Flight Project, it was found that a European manufacturer was building its boards to a European standard that had no requirement for copper wrap on the vias. The amount of copper wrap that was measured on coupons from the panel containing the boards of interest was less than the amount specified in IPC-6012 Rev B, Class 3. To help determine the reliability and usability of the boards, three sets of tests and a simulation were run. The test results, along with results of simulation and destructive physical analysis, are presented in this paper. The first experiment involved subjecting coupons from the panels supplied by the European manufacturer to thermal cycling. After 17 000 cycles, the test was stopped with no failures. A second set of accelerated tests involved comparing the thermal fatigue life of test samples made from FR4 and polyimide with varying amounts of copper wrap. Again, the testing did not reveal any failures. The third test involved using interconnect stress test coupons with through-hole vias and blind vias that were subjected to elevated temperatures to accelerate fatigue failures. While there were failures, as expected, the failures were at barrel cracks. In addition to the experiments, this paper also discusses the results of finite-element analysis using simulation software that was used to model plated-through holes under thermal stress using a steady-state analysis, also showing the main failure mode was barrel cracking. The tests show that although copper wrap was sought as a better alternative to butt joints between barrel plating and copper foil layers, manufacturability remains challenging and attempts to meet the requirements often result in features that reduce the reliability of the boards. Experimental and simulation work discussed in this paper indicate that the standard requirements for copper wrap are not contributing to the overall board reliability, although it should be added that a design with a butt joint is going to be a higher risk than a reduced copper wrap design. The study further shows that procurement requirements for wrap plating thickness from Class 3 to Class 2 would pose little risk to reliability (minimum 5 μm/0.197 mil for all via types).Experimental results corroborated by modeling indicate that the stress maxima are internal to the barrels rather than at the wrap location. In fact, the existence of Cu wrap was determined to have no appreciable effect on reliability.
Industry Directory | Consultant / Service Provider / Manufacturer
RUNLEADER is a professional supplier of hour meter,tachometer,battery indicator etc for Motorcycle, ATV,UTV,Dirt Bike, Pit Bike, Jet Ski, Snowmobile, paramotor engine, dune buggy etc.
Events Calendar | Tue Nov 06 00:00:00 EST 2018 - Thu Nov 08 00:00:00 EST 2018 | Atlanta, Georgia USA
FABTECH
Fully synchronized high-speed coiler for cut & strip machines. Fast and efficient machine for coiling wires, cables, and other round materials at a favorable price/performance ratio.
With the DEK NeoHorizon iX you can’t go wrong. With their advanced features, the new models provide a powerful and highly accurate solution for any application.
Scienscope video coordinate measurement machines are specifically designed for non-contact measurement and inspection of small intricate features on small or large parts. These video measurement systems are a natural step up from measuring microscope
Industry News | 2003-04-28 21:29:00.0
Seeking representation in New England area