Electronics Forum | Fri Aug 23 05:16:16 EDT 2002 | pizzafred
Dear Kovachik, Why used? What is your budget? I have heard from a couple of rep's that there are some new products coming to the market (USA & Canada) with a sample size of 16 x 16 with a 45 deg view for under 55K US Fred
Electronics Forum | Thu Aug 29 09:55:37 EDT 2002 | davef
Sounds like hyper-corrosion of nickel, commonly referred to as 'black pad', in ENIG solderability protected boards. Search the fine SMTnet Archives to get started. Additionally, the July - September 2002 'Journal Of Surface Mount Technolgy' has an
Electronics Forum | Fri Sep 06 09:44:13 EDT 2002 | mhunter
We have found the same problem recently. Is there somewhere that I can post images to, for additional observational opinions.
Electronics Forum | Tue Oct 15 13:35:57 EDT 2002 | Chris Dill
Stress analysis on a component is available ECT (fixture house) Feel free to contact me @ (401)739-7320 x3337 for info. Chris
Electronics Forum | Tue Oct 08 17:33:56 EDT 2002 | dragonslayr
user just posted today. Thre are 5 identical copies of the users question. maybe a little clean up is needed?
Electronics Forum | Wed Oct 02 15:20:55 EDT 2002 | Eric
Is there a steadfast rule of thumb for a good solder joint on an Enig Gold board. I come across this number 217C when discussing BGA profiles. Is this a published number? I sure could use a reference. Anybody feedback is appreciated.
Electronics Forum | Fri Sep 27 08:45:47 EDT 2002 | pr
Chevron marks are sets of lines (at right angles, on either side of component) placed on the board to help verify placement (we used it on BGA's) since you can't look at lead to pad to check placement accuracy. That's the only time I've seen it used.
Electronics Forum | Fri Sep 27 10:54:55 EDT 2002 | yngwie
Thank you pr. It was much appreciated. Is this mark normally act like a global fiducial/local fiducial for mBGA ? Is this a standard mark that can be read by the placement machine? what is the typical size of this mark ? are they masked ? thank y
Electronics Forum | Tue Oct 08 09:51:10 EDT 2002 | larryk
Russ, I use the R562, it has a longer tack time then the Hm531 and have found no problems with voiding on my BGAs. You may want to evaluate this formula also Larry
Electronics Forum | Tue Oct 08 18:54:04 EDT 2002 | BobbyB
Hey Russell. The boys at Air-Vac Engineering can help you solve your problem. Are you using an DRS system. If not, you are probably out of luck and should scrap the boards. Cheers!
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