Electronics Forum | Tue Aug 28 07:36:25 EDT 2007 | davef
If the copper on your PTH is not one thou, you will get blowholes. With the cost of copper going through the ceiling, you will get less than one thou of copper plating from substandard suppliers. Consider baking your boards prior to wave soldering
Electronics Forum | Mon Dec 14 13:20:56 EST 2009 | stepheniii
Xrays go through aluminum quite well. I've xrayed BGAs with heat sinks that were well over an inch tall and they only made faint shadows. What material is the bottom of the PCB? And how are you going to bond to it?
Electronics Forum | Mon Feb 06 19:11:25 EST 2012 | broncomania
Yes. You need to educate your customer... On a side note, hopefully these boards hasn't gone through wave over your LF solder pot.. This will contaminate your solder pot and won't be cheap to fix it.
Electronics Forum | Fri Jun 22 07:16:37 EDT 2012 | brettrenishaw
Spray fluxing yes but have checked the uniformity by using a fluxometer. Also have put boards through with only flux and preheat. no wave up to see if the carrier is being burnt off. I will look into the skip plating issue. Thanks again
Electronics Forum | Tue Nov 01 14:50:05 EDT 2016 | dyoungquist
The bare pcb has lead HASL finish. Components are lead-free and lead-free solder was used to solder the plate-through components. Is this acceptable or will there be reliability issues?
Electronics Forum | Wed Nov 21 05:57:30 EST 2018 | premkumar_haribabu
Hi Robl, Thanks for your qucik reply!! , i understand if we use aggresive flux that we can impove solder wetting over nickel plate vs PCB pads & we need to solder through 12 zones reflow oven. Prem
Electronics Forum | Tue Sep 25 14:25:30 EDT 2001 | davef
Points in response are: * Microstencils work fine with paste, although they are a little fussy to use. * Never have used microstencils for flux. * Like Hussman, we dab the uBGA into a puddle of tacky flux and then place it on the board. * On contro
Electronics Forum | Tue Jul 14 13:47:53 EDT 1998 | Mark Barnett
There's a battle brewing around here regarding the use of press fit connectors in place of their thru hole counterparts because of suuposedly better reliability. Is there any validity to this statement? Up until now, we have only been going with pr
Electronics Forum | Wed Oct 23 14:45:00 EDT 2002 | Tom G
I haven't tried anything like that but had some experience with .8 mm pitch SSOPs. Immersion depth in wave was very critical- had to control Lambda pump speeds within 20 RPM and even then it would change as solder level dropped. Need thieving pads o
Electronics Forum | Mon Nov 11 13:46:43 EST 2002 | ksfacinelli
I have a interesting problem. I have a client that would like us to build 15-20 prototypes of a fairly complex design that contains a Enplas OTB-289-0.8 BGA socket. The problem I have is the customer does not have enough sockets and is asking if we
