Industry Directory | Manufacturer
X-Parts Way Technology Co., Limited was established by a team of highly specialized engineers with the aim to provide turnkey solutions for reliable EMS (Electronics Manufacturing Services) .
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.
New Equipment | Education/Training
Get Ahead... Smart decisions and top-notch quality are critical to success — particularly in the highly competitive, ever-changing electronic interconnection industry. Training alone may help with your quality initiatives, but when key employees act
Industry News | 2015-11-04 20:46:46.0
FSInspection today announced that it will provide the X-Mag Machine Vision Station in the Hand Soldering Competition presented by IPC — Association Connecting Electronics Industries® in cooperation with productronica 2015. Skilled competitors will demonstrate their soldering skills on Nov. 10–13 in Hall A2, stand 405, as they compete for cash prizes: 1st place — €300; 2nd place — €200; 3rd place — €100; and a coveted spot at the IPC Hand Soldering World Championship at IPC APEX EXPO® in Las Vegas, Nevada on March 15-17, 2016.
Industry News | 2013-01-17 11:06:48.0
Juki Automation Systems, Inc. today announced its product lineup to be exhibited in Booth #513 at the upcoming IPC APEX EXPO
Electronics Forum | Wed Feb 12 16:48:31 EST 2014 | gmcquoid
We are having an internal debate here related to minimum Conductor Width. Can you have your QA manager review this and advise. IPC-6012C-2010 3.5.1 Conductor Width and Thickness When not specified on the master drawing the minimum conductor width s
Electronics Forum | Thu Jan 12 22:29:10 EST 2023 | rgduval
So, as I understand it, IPC6012 are performance criteria that your board shop should be using. I think you'd want to be using IPC600 for acceptance criteria at incoming inspection. At least, that's what I always did in my CM days. And, since you'r
Electronics Forum | Mon Jun 14 14:39:12 EDT 2004 | davef
HASL Thickness: * HADCO DFM manual specifies a nominal thickness of 50-1500uin with an option for 100-1000uin * Merix DFM manual specifies 30-200uin IPC-6012, Class 1, 2, 3 do not spec a HASL thickness at all but only require that full coverage is m
Electronics Forum | Mon Aug 16 13:18:46 EDT 2004 | davef
You bet our reponse changes. Q2R: Hard gold thickness is 4 to 10 u" for Au and 300 to 400 u" for nickel A2R: This is a hard gold spec?? It looks like a ENIG spec. Although, the Ni is quite heavy, 150 uin is sufficient for most applications. The gol
Electronics Forum | Fri Aug 15 00:51:30 EDT 2008 | boardhouse
Hi Paul, My discloser, I sell for an offshore house, this is Crap.... Section 3.4.3 Annular Ring (External) of IPC-6012A, which also calls out Table 3-5, states that "Plated-through holes identified as vias can have up to 90 degrees breakout of t
IPC is the trade association for the printed wiring board and electronics assembly industries.
Training Provider / Events Organizer / Association / Non-Profit
3000 Lakeside Drive, 309 S
Bannockburn, IL USA
Phone: 847-615-7100