Electronics Forum | Tue Jul 08 18:32:29 EDT 2003 | MA/NY DDave
Hi Wow you are right. This even goes back to one tread started by David F a long time ago. Yet I can't find that anyone really gave a White Paper answer to the original question in any of the SMTnet responses. I do read a lot of subjectives. So Vi
Electronics Forum | Mon Mar 11 11:11:38 EST 2002 | slthomas
Tahnk you for posting the charts. > > They look > very useful, but I have a silly question: In > reflow problems _ What is "leaching" ? Dissolution of the component metallisation into the liquid solder. _ > What is "Halo effect" ? "...a
Electronics Forum | Fri Mar 08 09:27:43 EST 2002 | Amir
hello guys and gals: we know that BGA placement or rework are such a pain in *** oh well! but i was wonder if you can help me to figure: how many BGA do you place on board annualy? (just a bulk park idea) do you rework BGA in house? do you think
Electronics Forum | Fri Mar 08 11:44:00 EST 2002 | poirot
I manufacture industrial ink jet printers. I have a new application to join an unpopulated flex circuit to a light ly populated PCB. Production requirements are rather low. The area To join is 300 solder balls on the flex occupying an area of 5/8 i
Electronics Forum | Sat Mar 09 00:49:19 EST 2002 | Shaun
Hi, I'm currently building a power supply right now and it requires one 14,000uF 40v capacitor. The problem is I dont have a capcitor with that value, and they are hard to find and very expensive to buy. What i was thinking of doing is putting a bunc
Electronics Forum | Wed Mar 13 20:40:02 EST 2002 | davef
Nice maCHEEN, mon. Please explain, �reliably dispensing�. What do you mean? How do measure? How are you sure? Etc. Just as points of reference: * What is the ratio of height to diameter of your dots? * How are you sure that you�re not stringing?
Electronics Forum | Wed Mar 20 11:55:19 EST 2002 | slthomas
Interesting. Ours failed miserably. Of course we toss everything on the stencil at the end of a shift (they are instructed to let it run down to minimal volume on the stencil as they approach quitting time) so it's not an issue. We are more concer
Electronics Forum | Thu Mar 14 09:07:26 EST 2002 | cfraser
I can not tell you what the actual stress limits are. I can tell you that de-paneling PCB's by hand is a very poor choice. I have seen numerous accounts of cracked caps, resistors, and LED�s due to incorrect de-paneling procedures. I would recommend
Electronics Forum | Thu Mar 14 17:10:22 EST 2002 | stepheno
I've been looking at buying a trace repair kit. The one I'm looking at includes some nifty little bits for a dremel or whatever. What I was wondering is, if someone is going to cut traces with a dremel, would you reccommend getting the stand for it
Electronics Forum | Sat Mar 16 18:06:31 EST 2002 | davef
First, you're correct. Trace repair and rework is not for the faint of heart or novices. Second, our "girls" prefer a dental drill type tool [Dremel Flexshaft], rather than the clumsy Dremel type from Wal-Mart. They also like a vice with a unversa
