Electronics Forum | Wed Aug 17 16:09:08 EDT 2005 | pjc
A skilled hand-soldering operator can easily do the rework. Applying liquid flux and raking the iron tip across the leads removes bridges. Removal and replacement of QFP-64 can be done manually. This is of course for very low volume of this type QFP-
Electronics Forum | Thu Aug 25 06:01:54 EDT 2005 | johnw
Guys I hope you will be able to help. I asked our local Fuji agent for a copy of the calculator for inputing the average deviation values and they wont give me a copy too scared we get to know too much, the ironic thing is I had my own copy but my ha
Electronics Forum | Tue Sep 20 10:32:25 EDT 2005 | slthomas
I would say it depends on the process requirements for the board and the reliability requirements as has already been mentioned. If you do two-sided reflow you might allow for fewer rework attempts, for example. If it's a medical device you might on
Electronics Forum | Mon Oct 03 09:31:31 EDT 2005 | Rob
There's also microflame which uses a mini gas flame to melt the solder. We tried a number of ways then modified some conveyorised robot cells we bought at auction, using wire feed & an iron head, incorporating veriable tinning & preheat, with point
Electronics Forum | Thu Nov 17 15:40:23 EST 2005 | Hoss
We have a board that has been diagnosed with inner layer separation from the barrel wall. This board is .093 thick and 12 layers. Several layers, in some cases, have little or no thermal relief making soldering difficult. We have since switched t
Electronics Forum | Thu Nov 17 20:23:55 EST 2005 | davef
We're with your customer. We believe inner layer separation is not linked to a heating excursion. What you are seeing is separation between the hole wall and the copper plating in the barrel of the hole on an unstressed PTH. Although, it's possibl
Electronics Forum | Fri Dec 02 08:52:05 EST 2005 | pavel_murtishev
Good evening, I�ve just solved very similar soldering issue. In my case the problem was with 0603 chips. Solder joint had same appearance. I suspected that solder do not melted and increased TAL and peak temperature. No result. Next thing I tried to
Electronics Forum | Wed Feb 22 09:48:24 EST 2006 | slaine
Hi Ive checked into this a bit more, there are two coatings im told you can get one is a teflon coating that you paint on then bake, the other is a red oxide (lead free) paint. Also if your using solder pots and they are close grain cast iron they a
Electronics Forum | Tue Mar 07 14:41:42 EST 2006 | bman
"Would you be able to use a piped water eye wash system? That way the water is always fresh." That's what you would think, but I've heard otherwise. If you don't flush them out regularly, the water will sit in the pipes and start coroding them. If
Electronics Forum | Fri May 12 08:50:40 EDT 2006 | Rob
Just come back from Nepcon (electronics show on an obscure little island on the other side of the pond) and had a good chance to look & play with a whole bunch of solder wire. Koki do one that is aprox. 99/0.7/0.3 with 0.03 Cobolt in. They claim th
