Electronics Forum | Mon Apr 28 08:52:10 EDT 2003 | davem
Chrissie, I'm glad you (and your people) made it through the painful process of reworking all those BGA's. Hope all your boards sucessfully pass test. Now on to the larger issue. In my experience, the solder paste screen printing process is (along
Electronics Forum | Thu May 08 11:58:12 EDT 2003 | fmonette
Hi Chrissie, This might be old news to you but I just wanted to make sure that you are aware of all the implications of BGA rework relative to the control of moisture-sensitive components. For example, you need to keep track of the total exposure t
Electronics Forum | Fri Apr 11 14:53:50 EDT 2003 | MA/NY DDave
Hi A lot of good answers. "No verification was done on the part as it was deemed to be a "straight replacement". Sound familiar?" Yes this sounds familiar, yet I am never sure it is a new supplier or component problem. It could be that the old par
Electronics Forum | Tue Apr 15 08:38:23 EDT 2003 | pjc
Don't have any specific links to papers and articles. Try searching on the IPC.org (plus APEX show http://www.goapex.org) and SMTA.org web sites. Any papers and articles on the process from equipment mfg.'s should be taken with a grain of salt. Sold
Electronics Forum | Mon Apr 14 17:21:12 EDT 2003 | davef
We reimburse production people for the co-pay on their health insurance when they include screening for lead in their blood test. Personnel Department has always been opposed to this on the grounds that it�s unfair since front office people don�t re
Electronics Forum | Wed Apr 23 10:27:32 EDT 2003 | bernard
Hi Pete, What you are describing is something that will happen regardless of feeder type or machine type. When taking off a partial reel there is the potiential to lose components. It is minimised by careful handling. Yes I would agree that the Myda
Electronics Forum | Wed Apr 16 16:55:38 EDT 2003 | russ
Thanks for the info, Here is a couple more questions (and you thought you were done) What size are these caps /res? how thick is your stencil? what type of oven are you using? what is the finish of the board? Anyway, it seems like (from a distance)t
Electronics Forum | Fri Apr 18 08:24:49 EDT 2003 | tsongshe
Hello,all.these days I met many skewed transistors after reflow soldering.we 've tried many ways attemting solving it thoroughly...changing the aperture pattern,solder volume and even changing the size of pcb pad,but the results are not very good.eve
Electronics Forum | Fri Apr 18 13:47:19 EDT 2003 | davef
Brian What did we recommend? We just gave you a link so that you can see how to get your pictures on-line, so that we can see what�s going on. Anyhow, if we understand what you saying, [We're slow today. So, please be patient.] your situation is:
Electronics Forum | Thu Apr 24 20:39:01 EDT 2003 | davef
3NaH2PO3 + H2SO4 + 2H2 + Ni^0 Potassium is co-deposited with the nickel, as follows: H2PO2^- + Hads => H2O + OH^- + P 3H2PO2^- + P => H2PO3^- + H2O + 2OH^- Nick Biunno gives a very short, over simplified summary: "Everybody looks at the nickel, b
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