Electronics Forum | Thu Jun 04 16:14:04 EDT 1998 | Terry Burnette
| What methods do people use to dress pads after removing and before replacing the BGA? | We use solder wick and a soldering iron, focusing on not "dragging" the wick across vias. This is laborous and booring. Who has a better way? | Dave F We've bee
Electronics Forum | Tue Aug 13 17:34:44 EDT 2002 | pjc
The Electra is Electrovert's top-of-the-line wave solder machine. Just about the best you could get. Conveyor concerns should focus on the condition of the extruded rails. A machine that new should not have a problem, buy worth a look see. Find out i
Electronics Forum | Fri Oct 14 10:55:07 EDT 2005 | Mika
We have a simular problem with Ni/Au; especially whith pcb thickness more than 1.8mm. Note: These boards have been through reflow process also. 1.)Is there a maximum board thickness where it would be almost impossible to get a decent hole fil? 2.)Wi
Electronics Forum | Thu Sep 16 20:55:35 EDT 1999 | Dave F
| | We have some SMT components with gold plated leads. They're actually LCC led packages. A good solder alloy to use would be Indium / Lead to reduce tin dissolution into the gold and avoid the resultant brittle intermetallic compound. However, a re
Electronics Forum | Wed Jan 19 11:52:34 EST 2000 | Dave F
PC and Erico: Are yinns talking: 1 A component that will not lie flat on the board? 2 A component that will lie flat to the board that you can't get to solder to the pad? 3 A pad that is no longer attached to the board? 4 Something else. Whazit?
Electronics Forum | Wed Oct 03 21:28:38 EDT 2001 | davef
A firm grasp on the sublime. Mike points-out a good reason to describe Claude's problem as "open connections" or "open solder connections"? [Ahhh geez, wut a spoil spurt]
Electronics Forum | Thu Mar 10 04:08:09 EST 2005 | Rob
It has benefits for solderability too, but costs rather a lot of money to convert your machine & you have to buy in nitrogen on a regular basis (unless you have a generator).
Electronics Forum | Mon Nov 26 13:09:20 EST 2007 | realchunks
Even a slight amount of epoxy will prevent a part from soldering. Look at the part after print. If you any trace of you epoxy between the pad and part, you have a potential problem.
Electronics Forum | Thu Jan 29 16:48:49 EST 2009 | slthomas
Looks like a time/temperature problem to me. However, there are a lot of solder fines surrounding the pads in one photo that go beyond what I'd expect from inadequate TAL. Is it possible that the board was misprinted and not completely cleaned, or
Electronics Forum | Wed Sep 23 21:40:29 EDT 2009 | davef
We apply temporary solder mask off line, using a programmable dispense head. Works fine. Purchasing a placement machine with a dispense head usually only works-out well for the sales-type. Not in every case, but usually.
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