Electronics Forum | Thu Jan 08 10:56:13 EST 2009 | aj
Hi, Is there any PTH Assembly after reflow, we found cracked joints on some BGAs which was caused by operators ing Oupin connectors which were a tight fit. This caused the PCB to flex hence cracking joints. One way of checking for this during test
Electronics Forum | Wed Jan 07 07:50:24 EST 2009 | ludee_circuits
I think so. My customer once assembled resistors 0402 ,by Glue+wave soldering process. But PCB must be printed soldermask bridge between 0402 SMD PADs, otherwise you would encounter short problem. Sorry I don't have any comment for recommended footp
Electronics Forum | Mon Jan 12 14:50:18 EST 2009 | mosborne
A customer of mine has a Quad 4C that will not home in the X. It used to have the problem in the Y then they changed the cards and now that machine will not home in the X when powered up. Anybody have any ideas. I think I know what the problem is, bu
Electronics Forum | Thu Jan 15 15:16:56 EST 2009 | jsherrow
We recently had our customer report a component failure trend of a few percent. Analysis indicates wire bond failure internal to a d-pak caused by what appears to be chlorine contamination. We're running a lead free process with aqueous wash. 700 co
Electronics Forum | Fri Jan 16 12:03:46 EST 2009 | black5629
We are encountering similar problem as yesterdays posting, with solder not sticking to the pads but wicking to the leads on Leaded HAL finish boards, except we have tried two different solder paste lots with similar result. The oven profile and paste
Electronics Forum | Tue Jan 20 10:30:56 EST 2009 | milas
Hi We have just specified the following thicknesses for the Nickel and Gold on an ENIG finish board. The baord is to be manufactured using a lead - free process. My question: Is the thickness we've specificed likely to gie us any issues during manuf
Electronics Forum | Wed Jan 21 06:27:15 EST 2009 | gidster
Seem to be having difficulty with a MPA power source,it powers itself down every now and then. I have changed the relays nc4d and nc2d seems to work for a while but then it rears it's ugly head again, has anybody got any ideas or schematics as the ma
Electronics Forum | Thu Jan 22 10:19:07 EST 2009 | msangabriel
Currently we have a in line washer machine, like Westek, I need to replace it with a smaller footprint machine since my volume for that machine is low now and need to reduce the operation cost of that process. It can be a batch machine. Do you know o
Electronics Forum | Thu Feb 05 16:44:19 EST 2009 | stepheniii
I don't think there is any environment where lead free is as good as "real" solder. When you say "high vacuum" do you also mean low gravity? i.e. space? If so my understanding is when the tin whiskers short out the vapour does not settle down but in
Electronics Forum | Fri Jan 30 18:24:09 EST 2009 | gsala
Buenas dias Jos�, It shoul not be a problem. We had situation like that when in the early 2006 the Lead Free fase in Pb fase out, no pbm on solder joints. Today, after about 3 years, those cards are stil working in the field without any defect. Reg
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